CN108519301A - It is a kind of to utilize thermogravimetric analyzer evaluation coal and the reactive method of biomass char - Google Patents
It is a kind of to utilize thermogravimetric analyzer evaluation coal and the reactive method of biomass char Download PDFInfo
- Publication number
- CN108519301A CN108519301A CN201810198948.0A CN201810198948A CN108519301A CN 108519301 A CN108519301 A CN 108519301A CN 201810198948 A CN201810198948 A CN 201810198948A CN 108519301 A CN108519301 A CN 108519301A
- Authority
- CN
- China
- Prior art keywords
- reaction
- sample
- max
- time
- rate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Thermogravimetric analyzer evaluation coal and the reactive method of biomass char are utilized the present invention relates to a kind of, it mainly solves the problems, such as that current coke burning/gasification activity evaluation index is comprehensive and accuracy is insufficient, can preferably realize the reasonable characterization of coal and biomass char burning/gasification reactivity；The specific rate of reaction curve that can effectively reflect sample activity is obtained first, then several characteristic points are chosen on curve, eventually by the organic assembling of the parameter corresponding to these characteristic points, structure one can carry out comprehensively and the reaction composite index of accurate characterization example reaction activity；Above-mentioned reaction composite index combines multiple parameters that can reflect sample combustion/gasification behavior various aspects feature, difficulty or ease and intensity that the intrinsic burning of sample/gasification reaction occurs can be characterized comprehensively, be the more satisfactory index that overall merit is carried out to coal and the intrinsic reactivity of biomass char.
Description
Technical field
The invention belongs to energy and environment technical field, it is related to coal and biomass char burning/gasification activity evaluation side
The improvement of method concretely relates to a kind of utilizing the thermogravimetric analyzer evaluation coal and reactive method of biomass char.
Background technology
All using coal or biomass as raw material, using thermochemical study as the burning of basic principle and gasification process system
In, raw material experienced dry, volatile matter precipitation（Pyrolysis）With reformation and three processes of burning/gasification of coke.Have very
Multiphase is closed studies have shown that compared with dry and pyrolysis, and the rate of burnt burning/gasification reaction is very low, is entire thermal conversion processes
In the slowest step, therefore determine the efficiency of entire process system.By taking air-flow bed coal-gasification process as an example, the drying of coal
And pyrolysis time only account for entire vaporization time less than 5%, and During Char Gasification occupy time be more than 95%.Therefore, nothing
By the design and operation for reactor in actual industrial system, or for the characterization of fuel fundamental characteristics in scientific research and
Analysis, the evaluation of coal and biomass char burning/gasification activity all have significance.
It can be by the generally accepted coal of vast scientific research and engineers and technicians institute however, there is no formation one kind so far
And the evaluation method of biomass char burning/gasification activity.Currently, tube furnace and thermogravimetric analyzer are test and evaluation coke combustion
The most frequently used instrument of burning/gasification activity.The method that existing technology evaluates the gasification activity of coal tar using upright tube furnace
For：Under 750 ~ 1100 DEG C of constant temperature, make coal tar sample and CO within a certain period of time2Reaction, with CO after reaction2Reduction
RateαEvaluation indexes of the percentage CRI (%) of (%) or coke quality loss as example reaction.However, above-mentioned test and commenting
Valence method has the following defects：(1) require the grain size of coal tar sample in mm magnitudes, and accumulation reaches certain thickness in the reactor
Degree, which adds the resistances of the inside and outside diffusion of particle in reaction process, keep intrinsic chemical reaction rate anti-to total packet procedures
It answers the contribution degree of rate to reduce, anticipates to the characterization of the intrinsic reactivity of sample to weaken finally obtained reactive data
Justice；(2) reactive evaluation index used by is the description of the sample cumulant within a specified time participating in reaction, without
It can reflect the difficulty or ease and intensity that sample during this period of time reacts, therefore can not comprehensively characterize the reaction of sample
Activity；(3) desired sample usage amount is big (tens to several hectograms), and test equipment is complicated, complex for operation step, therefore limits
The popularization and application of method.
Compared with tube furnace, thermogravimetric analyzer has sample usage amount small, uniform temperature fields, and data precision is high, and operation is just
The advantages that sharp, therefore paid attention to by more professional technicians.Based on thermogravimetric analyzer, many indexs are suggested and are used for coke
The characterization of charcoal burning/gasification activity, such as：Ignition temperature, maximum weight loss rate and its corresponding temperature, initial reaction speed
Rate, average response rate, specific rate of reaction, half-life period reaction rate, apparent activation energy, efficiency of carbon con version reach corresponding when 50%
TemperatureT 0.5Or the timeτ 0.5, reactivity index 0.5/τ 0.5、0.38/τ 0.5And 2/τ 0.5Deng.However, These parameters are answered
With there are still some problems：(1) some indexs are to measure at relatively high temperatures (such asτ 0.5), the speed of intrinsic chemical reaction at this time
Rate is very fast, thus the opposite contribution degree for improving the total packet procedures reaction rate of the inside and outside diffusion couple of sample particle, makes index to sample
The symbolical meanings of intrinsic reactivity weaken.(2) when test temperature is higher than coke preparation temperature, the thermal effect of reactive test process
Should be by the additional variation of introducing sample chemical structure, the data to prevent from reflecting that sample really reacts living well
Property.(3) These parameters only the unilateral difficulty or ease for reflecting coke burning/gasification reaction (such as ignition temperature, maximum weight loss rate institute
Corresponding temperature, apparent activation energy,T 0.5、τ 0.5、0.5/τ 0.5、0.38/τ 0.5And 2/τ 0.5) or intensity (such as maximum weightless speed
Rate, initial reaction rate, average response rate, specific rate of reaction and half-life period reaction rate), and can not be to the reaction of sample
Property is comprehensively characterized.
In conclusion being based on thermogravimetric analyzer, exploitation is a kind of can be to intrinsic burning/gasification reaction of coal and biomass char
Property carry out thoroughly evaluating method, no matter for practical engineering application or for basic scientific research all have significance.
Invention content
The technical issues of in order to solve proposed in background technology, it is test that the present invention provides one kind with thermogravimetric analyzer
Instrument, being capable of convenient and efficient and all-sidedly and accurately evaluation coal and biomass char burning/gasification activity method.
In order to achieve the above object, the present invention provides a kind of reactive using thermogravimetric analyzer evaluation coal and biomass char
Method is characterized in that：Concrete operation step is as follows：
(1) coal of 4 ~ 7 mg or biomass char sample is evenly laid out in crucible, form a thin sample layer；
(2) it is 50 ~ 80 mLmin in flow-1High-purity N2In atmosphere, by sample with 10 ~ 60 DEG C of min-1Heating rate
110 DEG C are heated to from room temperature, and 10 min are stopped to obtain the dry matrices amount m of sample at 110 DEG C1；
(3) keep atmosphere constant, with 10 ~ 40 DEG C of min-1Heating rate heat the sample to 350 ~ 650 DEG C of reaction temperature
Degree, and stopping 2 min makes temperature of reactor field stablize；
(4) by atmosphere by N2Switch to the high pure air or CO of same traffic2, and sample is enabled to keep 100 ~ 150 in reaction temperature
Min, this is reactive test phase；
(5) by atmosphere by high pure air or CO2Switch to high-purity O2, and by sample with 10 ~ 20 DEG C of min-1Heating rate add
Heat is to 800 ~ 850 DEG C and stops 20 min, enables remaining sample organic matter complete oxidation and obtains quality m grey in sample2；
(6) in entire test process, for the quality of sample by real-time continuous record, it is the reaction time to form horizontal axistSample weight loss
(TG) curve seeks first derivative to get to the weight loss rate of sample (DTG) curve to this curve；
(7) specific rate of reaction curve is obtained by TG and DTG curves in accordance with the following methods：The longitudinal axis is specific rate of reactionR, unit is
s-1,R = (-1/w) × (dw/dt), in formulawFor the dry ash free basis matter of sample described in reactive test phase any time
Amount, unit mg；(dw/dt) be withwThe weight loss rate of sample, unit mgs described in the corresponding moment-1；When horizontal axis is reaction
Betweent, unit min；(8) main reaction stage maximum specific rate of reaction is found on specific rate of reaction curveR maxAnd its it is corresponding
Timet max；
(9) reaction initial time is foundt s, the kickback time startedt 50%, reaction the end timet fAnd half-peak breadthΔt 1/2；
(10) it calculatest sWitht fBetween average specific rate of reactionR mean；
(11) according toR c =[R max·R mean]/(t max·Δt 1/2) definition, calculate reaction composite indexR c , as evaluation sample
The reactive final index of product.
Compared with prior art, the present invention has the advantages that：
1, used reaction temperature is relatively low, effectively prevents the variation for the sample chemical structure that fuel factor is brought, to larger
The prototype structure and property of sample are kept to degree, therefore the data obtained can preferably reflect that the actual response of sample is lived
Property.
2, used reaction temperature is relatively low, and the intrinsic chemical reaction rate of sample is relatively low, to advantageously ensure that test
The control mechanism of overall reaction process be chemical reaction, therefore the data obtained can effectively reflect the intrinsic reaction of sample
Activity.
3, used reactive evaluation index --- reaction composite indexR c Combine it is multiple can describe sample combustion/
The parameter of gasification behavior various aspects feature, in definitionR maxWithR meanThe intensity of reaction is characterized,t maxWithΔt 1/2
The difficulty or ease and intensity of reaction are then characterized, thereforeR c It is the overall merit to example reaction, it being capable of all-sidedly and accurately table
Levy the intrinsic reactivity of sample.
Description of the drawings
Fig. 1 is the specific rate of reaction curve of the embodiment of the present invention one；
Fig. 2 is the specific rate of reaction curve of the embodiment of the present invention two；
Fig. 3 is the specific rate of reaction curve of the embodiment of the present invention three；
Fig. 4 is the specific rate of reaction curve of the embodiment of the present invention four；
Fig. 5 is the numerical value of the parameter and reaction composite index corresponding to the characteristic point of each embodiment；
The shape of above-mentioned four kinds of specific rate of reaction curves is most representative, they choose the characteristic point institute of the foregoing description each other
Difference, specific choosing method will be described in greater detail below the method for corresponding parameter.
Specific implementation mode
The invention will be further described in the following with reference to the drawings and specific embodiments.
As shown in Figs 1-4, thermogravimetric analyzer evaluation coal and the reactive side of biomass char being utilized the present invention provides a kind of
Method, wherein：Less sample is positioned over ratio of height to diameter (height:Basal diameter) in smaller crucible, under lower reaction temperature
It has an effect with reaction gas and weightlessness occurs, several characteristic points are chosen on obtained specific rate of reaction curve, pass through these spies
The organic assembling of the corresponding parameter of sign point, structure one can carry out comprehensively and the reaction of accurate characterization example reaction activity
Composite index.
The sample is coal tar or biomass char, and usage amount is 4 ~ 7 mg.
The ratio of height to diameter of the crucible is 1:5~1:3, basal diameter is 13 ~ 17 mm, and material is high purity aluminium oxide or platinum
Gold.
The reaction temperature is kept constant in reactive test phase, is 350 ~ 450 DEG C for combustion reaction test,
It it is 450 ~ 650 DEG C for gasification activity test；Under the same terms, biomass char selects relatively low reaction temperature.
The reaction gas is high pure air for combustion reaction test, is high-purity CO for gasification activity test2,
Flow is 50 ~ 80 mLmin-1。
The longitudinal axis of the specific rate of reaction curve is specific rate of reactionR, unit s-1,R = (-1/w) × (dw/dt), in formulawFor the dry ash free basis quality of sample described in reactive test phase any time, unit mg；(dw/dt) be
WithwThe weight loss rate of sample, unit mgs described in the corresponding moment-1；Horizontal axis is the reaction timet, unit min.
Parameter corresponding to the characteristic point is：Main reaction stage maximum specific rate of reactionR max, unit s-1；It is maximum
Specific rate of reactionR maxThe corresponding timet max, unit min；React initial timet s--- react the ratio of sample described in early period
Reaction rateRRise to main reaction stage maximum valueR max10% corresponding to time, unit min；The kickback time startedt 50%--- react the specific rate of reaction of sample described in early periodRRise to main reaction stage maximum valueR max50% corresponding to time,
Unit is min；React the end timet f--- the specific rate of reaction of sample described in the reaction later stageRIt is reduced to main reaction stage maximum valueR max10% corresponding to time, unit min；t sWitht fBetween average specific rate of reactionR mean, unit s-1；Half-peak breadthΔt 1/2--- correspond toR / R max =1/2 time interval, unit min.
The reaction composite index isR c =[R max·R mean]/(t max·Δt 1/2), unit s-2·min-2, in formulaR max、R mean、t maxWithΔt 1/2Respectively the main reaction stage maximum specific rate of reaction, average specific rate of reaction, high specific
Time corresponding to reaction rate and half-peak breadth.
The concrete operation step that the reactivity evaluation of coal and biomass char is carried out using the above method is as follows：
(1) coal of 4 ~ 7 mg or biomass char sample is evenly laid out in crucible, a thin sample layer is formed, sample layer is put down
Equal thickness is between 0.2mm---0.4mm.
(2) it is 50 ~ 80 mLmin in flow-1High-purity N2In atmosphere, by sample with 10 ~ 60 DEG C of min-1Heating speed
Rate is heated to 110 DEG C from room temperature, and stops 10 min at 110 DEG C to obtain the dry matrices amount m of sample1。
(3) keep atmosphere constant, with 10 ~ 40 DEG C of min-1Heating rate heat the sample to 350 ~ 650 DEG C of reaction
Temperature, and stopping 2 min makes temperature of reactor field stablize.
(4) by atmosphere by N2Switch to the high pure air or CO of same traffic2, and enable sample reaction temperature keep 100 ~
150 min, this is reactive test phase.
(5) by atmosphere by high pure air or CO2Switch to high-purity O2, and by sample with 10 ~ 20 DEG C of min-1Heating speed
Rate is heated to 800 ~ 850 DEG C and stops 20 min, enables remaining sample organic matter complete oxidation and obtains quality grey in sample
m2。
(6) in entire test process, for the quality of sample by real-time continuous record, it is the reaction time to form horizontal axistSample
Weightless (TG) curve seeks first derivative to get to the weight loss rate of sample (DTG) curve, finally according to before to this curve
The specific rate of reactionRDefinition calculated to get to the specific rate of reaction curve of sample.
(7) parameter corresponding to the series of features point of the foregoing description is chosen on specific rate of reaction curve：Main reaction rank
The maximum specific rate of reaction of sectionR max, maximum specific rate of reactionR maxThe corresponding timet max, reaction initial timet s, kickback
Time startedt 50%, reaction the end timet f, average specific rate of reactionR meanAnd half-peak breadthΔt 1/2, then according to the foregoing description
Reaction composite indexR c Definition calculated, obtain the final index for evaluating example reaction.
Embodiment 1
The burning specific rate of reaction curve of certain high response coal tar is as shown in Figure 1.With the extension in reaction time, curve is generally
Presentation first increases the trend reduced afterwards, and specific rate of reaction value is in Unimodal Distribution, and peak is broad, covers reactive test phase
Most of the time.The curve of this kind of shape is to be surveyed according to concrete operation step (1) ~ (6) of the foregoing description of the present invention
Try obtained most common type.Such as：The biomass char or coal tar of preparation are pyrolyzed at 400-500 DEG C；For such
Specific rate of reaction curve completes the concrete operation step (7) of the foregoing description of the present invention in accordance with the following methods：
(a) main reaction stage maximum specific rate of reaction is foundR maxAnd its corresponding timet max；
(b) reaction initial time is foundt s, the kickback time startedt 50%, reaction the end timet fAnd half-peak breadthΔt 1/2；
(c) it calculatest sWitht fBetween average specific rate of reactionR mean；
(d) according toR c =[R max·R mean]/(t max·Δt 1/2) definition, calculate reaction composite indexR c , as evaluation sample
The reactive final index of product.
Embodiment 2
The burning specific rate of reaction curve of certain hypoergia coal tar is as shown in Figure 2.With the extension in reaction time, curve is generally
Presentation is first increased and is reduced afterwards, then increases the trend reduced again, and specific rate of reaction value is in bimodal distribution, wherein first peak is sharper
It is narrow, and second peak is broad, the latter covers the most of the time of reactive test phase.Such as：It is pyrolyzed at 400-500 DEG C
The deliming coal tar of preparation；The shape of this class ourve is more special, discloses reactivity there are two types of containing in sample and differs greatly
Component：The first is the lower fatty component of active higher and content, is the source at sharper narrow specific rate of reaction peak；The
Two kinds are the higher fragrance component of active relatively low and content, are the sources at broad specific rate of reaction peak.Due to latter
Component is the bulk composition in coke chemical constitution, and its specific rate of reaction has dominated the most of the time in reaction test stage,
Therefore the peak at second peak is chosen to determine main reaction stage maximum specific rate of reactionR maxAnd its corresponding timet max.For such specific rate of reaction curve, the concrete operation step of the foregoing description of the present invention is completed in accordance with the following methods
(7)：
(a) peak for finding broad specific rate of reaction peak determines main reaction stage maximum specific rate of reactionR maxAnd its
The corresponding timet max；
(b) reaction initial time is foundt sWith the kickback time startedt 50%；
(c) the reaction end time is determinedt fAnd half-peak breadthΔt 1/2：Due to this response by analogy rate curve phase after the reaction
There is no presentations significantly to decline,t fThe last end time of reactive test phase is chosen, andΔt 1/2=2·(t max-t 50%)；
(d) it calculatest sWitht fBetween average specific rate of reactionR mean；
(e) according toR c =[R max·R mean]/(t max·Δt 1/2) definition, calculate reaction composite indexR c , as evaluation sample
The reactive final index of product.
Embodiment 3
The burning specific rate of reaction curve of certain hypoergia coal tar is as shown in Figure 3.With the extension in reaction time, curve is generally
Presentation first increases the trend reduced afterwards, and specific rate of reaction value is in Unimodal Distribution, and peak is broad, covers reactive test phase
Most of the time.However, unlike curve type shown in Fig. 1, such curve amplitude very little that the phase declines after the reaction.
Such as：The coal tar of preparation is pyrolyzed at 750-850 DEG C；The curve of this kind of shape is for the hypoergia for preparing at relatively high temperatures
Coke is relatively conventional.For such specific rate of reaction curve, the tool of the foregoing description of the present invention is completed in accordance with the following methods
Body operating procedure (7)：
(a) main reaction stage maximum specific rate of reaction is foundR maxAnd its corresponding timet max；
(b) reaction initial time is foundt sWith the kickback time startedt 50%；
(c) the reaction end time is determinedt fAnd half-peak breadthΔt 1/2：Due to this response by analogy rate curve phase after the reaction
There is no presentations significantly to decline,t fThe last end time of reactive test phase is chosen, andΔt 1/2=2·(t max-t 50%)；
(d) it calculatest sWitht fBetween average specific rate of reactionR mean；
(e) according toR c =[R max·R mean]/(t max·Δt 1/2) definition, calculate reaction composite indexR c , as evaluation sample
The reactive final index of product.
Embodiment 4
The burning specific rate of reaction curve of certain hypoergia coal tar is as shown in Figure 4.With the extension in reaction time, entirely reacting
Property test phase, dull raised trend is generally presented in curve.Such as：The coal tar or biology of preparation are pyrolyzed at 950-1050 DEG C
Matter is burnt；The curve of this kind of shape is common in the reactivity test of the less reactive char prepared under excessive temperature.For this type
The specific rate of reaction curve of type completes the concrete operation step (7) of the foregoing description of the present invention in accordance with the following methods：
(a) main reaction stage maximum specific rate of reaction is foundR maxAnd its corresponding timet max：Due to this response by analogy speed
Rate curve does not have extreme point and dull raising,t maxThe last end time of reactive test phase is chosen,R maxIt choosest maxInstitute is right
The specific rate of reaction value answered.
(b) reaction initial time is foundt sWith the kickback time startedt 50%；
(c) the reaction end time is determinedt fAnd half-peak breadthΔt 1/2：Due to this response by analogy rate curve phase after the reaction
There is no present downward trend,t fThe last end time of reactive test phase is chosen, andΔt 1/2=2·(t max- t 50%)；
(d) it calculatest sWitht fBetween average specific rate of reactionR mean；
(e) according toR c =[R max·R mean]/(t max·Δt 1/2) definition, calculate reaction composite indexR c , as evaluation sample
The reactive final index of product.
Fig. 5 is the parameter and reaction composite index corresponding to the characteristic point of each embodiment obtained according to the method described above
Numerical value.
The above-mentioned purpose to embodiment description, which is easy for those skilled in the art, can fully understand and have
Effect uses the present invention.Person skilled in the art obviously can easily various be repaiied by what is made to these embodiments
Change, general principle described herein is applied in other embodiment without having to go through creative labor.Therefore, of the invention
It is not limited to the above embodiments, those skilled in the art's enlightenment according to the present invention does not depart from the modification that scope is made
It all should be within protection scope of the present invention.
Claims (7)
1. a kind of utilizing thermogravimetric analyzer evaluation coal and the reactive method of biomass char, it is characterised in that：Concrete operation step
It is as follows：
(1) coal of 4 ~ 7 mg or biomass char sample is evenly laid out in crucible, form a thin sample layer；
(2) it is 50 ~ 80 mLmin in flow-1High-purity N2In atmosphere, by sample with 10 ~ 60 DEG C of min-1Heating rate from
Room temperature is heated to 110 DEG C, and stops 10 min at 110 DEG C to obtain the dry matrices amount m of sample1；
(3) keep atmosphere constant, with 10 ~ 40 DEG C of min-1Heating rate heat the sample to 350 ~ 650 DEG C of reaction temperature
Degree, and stopping 2 min makes temperature of reactor field stablize；
(4) by atmosphere by N2The reaction gas of same traffic is switched to, and sample is enabled to keep 100 ~ 150 min in reaction temperature, this is
For reactive test phase；
(5) atmosphere is switched into high-purity O by reaction gas2, and by sample with 10 ~ 20 DEG C of min-1Heating rate be heated to 800 ~
It 850 DEG C and 20 min of stop, enables remaining sample organic matter complete oxidation and obtains quality m grey in sample2；
(6) in entire test process, for the quality of sample by real-time continuous record, it is the reaction time to form horizontal axistSample weight loss
(TG) curve is sought first derivative to this curve and is obtained to get to the weight loss rate of sample (DTG) curve, then by TG and DTG curves
To specific rate of reaction curve, the selection for the parameter corresponding to series of features point；
(7) main reaction stage maximum specific rate of reaction is found on specific rate of reaction curveR maxAnd its corresponding timet max；
(8) reaction initial time is foundt s, the kickback time startedt 50%, reaction the end timet fAnd half-peak breadthΔt 1/2；
(9) it calculatest sWitht fBetween average specific rate of reactionR mean；
(10) according toR c =[R max·R mean]/(t max·Δt 1/2) definition, calculate reaction composite indexR c , as evaluation sample
The reactive final index of product.
2. according to claim 1 existed using thermogravimetric analyzer evaluation coal and the reactive method of biomass char, feature
In：The ratio of height to diameter of the crucible is 1:5~1:3, basal diameter is 13 ~ 17 mm, and material is high purity aluminium oxide or platinum.
3. according to claim 2 existed using thermogravimetric analyzer evaluation coal and the reactive method of biomass char, feature
In：The reaction temperature is kept constant in reactive test phase, is 350 ~ 450 DEG C for combustion reaction test, for
Gasification activity test is 450 ~ 650 DEG C；Under the same terms, biomass char selects relatively low reaction temperature.
4. according to claim 3 existed using thermogravimetric analyzer evaluation coal and the reactive method of biomass char, feature
In：The reaction gas is high pure air for combustion reaction test, is high-purity CO for gasification activity test2, flow
For 50 ~ 80 mLmin-1。
5. according to claim 4 existed using thermogravimetric analyzer evaluation coal and the reactive method of biomass char, feature
In：The longitudinal axis of the specific rate of reaction curve is specific rate of reactionR, unit s-1,R = (-1/w) × (dw/dt), formula
InwFor the dry ash free basis quality of sample described in reactive test phase any time, unit mg；(dw/dt) be withwAccordingly
The weight loss rate of sample described in moment, unit mgs-1；Horizontal axis is the reaction timet, unit min.
6. according to claim 5 existed using thermogravimetric analyzer evaluation coal and the reactive method of biomass char, feature
In：Parameter corresponding to the characteristic point is：Main reaction stage maximum specific rate of reactionR max, unit s-1；High specific reacts
RateR maxThe corresponding timet max, unit min；React initial timet s--- react the ratio reaction speed of sample described in early period
RateRRise to main reaction stage maximum valueR max10% corresponding to time, unit min；The kickback time startedt 50%——
React the specific rate of reaction of sample described in early periodRRise to main reaction stage maximum valueR max50% corresponding to time, unit is
min；React the end timet f--- the specific rate of reaction of sample described in the reaction later stageRIt is reduced to main reaction stage maximum valueR max's
Time corresponding to 10%, unit min；t sWitht fBetween average specific rate of reactionR mean, unit s-1；Half-peak breadthΔ t 1/2--- correspond toR/R max=1/2 time interval, unit min.
7. according to claim 6 existed using thermogravimetric analyzer evaluation coal and the reactive method of biomass char, feature
In：The reaction composite index isR c =[R max·R mean]/(t max·Δt 1/2), unit s-2·min-2, in formulaR max、R mean、t maxWithΔt 1/2Respectively the main reaction stage maximum specific rate of reaction, average specific rate of reaction, high specific reaction
Time corresponding to rate and half-peak breadth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810198948.0A CN108519301B (en) | 2018-03-12 | 2018-03-12 | Method for evaluating coal and biomass coke reactivity by using thermogravimetric analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810198948.0A CN108519301B (en) | 2018-03-12 | 2018-03-12 | Method for evaluating coal and biomass coke reactivity by using thermogravimetric analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108519301A true CN108519301A (en) | 2018-09-11 |
| CN108519301B CN108519301B (en) | 2020-12-29 |
Family
ID=63433567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810198948.0A Active CN108519301B (en) | 2018-03-12 | 2018-03-12 | Method for evaluating coal and biomass coke reactivity by using thermogravimetric analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108519301B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766173A (en) * | 2019-04-02 | 2020-10-13 | 宝武炭材料科技有限公司 | Method for evaluating coke quality for lithium battery negative electrode material |
| CN113324868A (en) * | 2021-05-18 | 2021-08-31 | 北京科技大学 | Method for evaluating oxidizing property of magnetite |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1963453A (en) * | 2006-12-01 | 2007-05-16 | 太原理工大学 | Method for research carbocoal constriction performance in pyrogenation processing of coal |
| CN101271053A (en) * | 2007-12-07 | 2008-09-24 | 辽宁工程技术大学 | Self-ignition fatalness decision method of coal |
| JP4309780B2 (en) * | 2004-02-20 | 2009-08-05 | 新日本製鐵株式会社 | Method for estimating strength after hot coke reaction and method for producing coke |
| CN103045780A (en) * | 2013-01-07 | 2013-04-17 | 北京科技大学 | Method for measuring coke reactivity index and strength after reaction of tuyere coke |
| CN203396772U (en) * | 2013-08-13 | 2014-01-15 | 鞍山市科翔仪器仪表有限公司 | Reactivity and post-reaction strength tester for double-furnace lump cokes |
| US20140109469A1 (en) * | 2012-10-24 | 2014-04-24 | Fred L. Jones | Process for minimizing dioxin formation during waste and biomass utilization |
| CN103940697A (en) * | 2014-03-26 | 2014-07-23 | 北京科技大学 | Test method for blast furnace coke reactivity |
| CN104142282A (en) * | 2014-07-30 | 2014-11-12 | 冀中能源集团有限责任公司 | Method for analyzing on-fire activation energy of spontaneous combustion characteristic of low-coalification-degree coal |
| CN104850755A (en) * | 2015-06-03 | 2015-08-19 | 上海明华电力技术工程有限公司 | Combustion stability determining method based on thermal decomposition |
| CN105181515A (en) * | 2015-10-19 | 2015-12-23 | 广东电网有限责任公司电力科学研究院 | Method and system for detecting combustion dynamic characteristics of pulverized coal in boiler hearth |
| CN105203579A (en) * | 2015-09-14 | 2015-12-30 | 中国环境科学研究院 | Thermal analysis determination method for plant biomass lignin content |
| CN105445141A (en) * | 2016-01-28 | 2016-03-30 | 河南农业大学 | Method for rapidly predicting component content and photosynthetic hydrogen production potential of different types of straw biomass |
| CN105527312A (en) * | 2016-01-04 | 2016-04-27 | 中国科学院过程工程研究所 | Method for analyzing melting characteristics of biomass ash |
| CN105823863A (en) * | 2016-03-28 | 2016-08-03 | 华北电力大学（保定） | Coal quality on-line industrial analysis and measurement method based on constant temperature thermogravimetric analysis |
| CN106383934A (en) * | 2016-09-05 | 2017-02-08 | 中国矿业大学 | Construction method of coke quality prediction model and coking and coal blending method |
| CN106896033A (en) * | 2017-04-26 | 2017-06-27 | 安徽理工大学 | A kind of method of the content of organic matter in measure gangue |
| CN107632107A (en) * | 2017-08-14 | 2018-01-26 | 华中科技大学 | A kind of Burning Behavior For Pulverized Coal quick determination method |
| CN107677763A (en) * | 2017-10-12 | 2018-02-09 | 国网河北能源技术服务有限公司 | One kind simulation coal dust firing and flue gas pollutant generation test system and method |
| CN107764681A (en) * | 2017-10-16 | 2018-03-06 | 深圳市贝特瑞新能源材料股份有限公司 | A kind of fast appraisement method of burnt raw material |
-
2018
- 2018-03-12 CN CN201810198948.0A patent/CN108519301B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4309780B2 (en) * | 2004-02-20 | 2009-08-05 | 新日本製鐵株式会社 | Method for estimating strength after hot coke reaction and method for producing coke |
| CN1963453A (en) * | 2006-12-01 | 2007-05-16 | 太原理工大学 | Method for research carbocoal constriction performance in pyrogenation processing of coal |
| CN101271053A (en) * | 2007-12-07 | 2008-09-24 | 辽宁工程技术大学 | Self-ignition fatalness decision method of coal |
| US20140109469A1 (en) * | 2012-10-24 | 2014-04-24 | Fred L. Jones | Process for minimizing dioxin formation during waste and biomass utilization |
| CN103045780A (en) * | 2013-01-07 | 2013-04-17 | 北京科技大学 | Method for measuring coke reactivity index and strength after reaction of tuyere coke |
| CN203396772U (en) * | 2013-08-13 | 2014-01-15 | 鞍山市科翔仪器仪表有限公司 | Reactivity and post-reaction strength tester for double-furnace lump cokes |
| CN103940697A (en) * | 2014-03-26 | 2014-07-23 | 北京科技大学 | Test method for blast furnace coke reactivity |
| CN104142282A (en) * | 2014-07-30 | 2014-11-12 | 冀中能源集团有限责任公司 | Method for analyzing on-fire activation energy of spontaneous combustion characteristic of low-coalification-degree coal |
| CN104850755A (en) * | 2015-06-03 | 2015-08-19 | 上海明华电力技术工程有限公司 | Combustion stability determining method based on thermal decomposition |
| CN105203579A (en) * | 2015-09-14 | 2015-12-30 | 中国环境科学研究院 | Thermal analysis determination method for plant biomass lignin content |
| CN105181515A (en) * | 2015-10-19 | 2015-12-23 | 广东电网有限责任公司电力科学研究院 | Method and system for detecting combustion dynamic characteristics of pulverized coal in boiler hearth |
| CN105527312A (en) * | 2016-01-04 | 2016-04-27 | 中国科学院过程工程研究所 | Method for analyzing melting characteristics of biomass ash |
| CN105445141A (en) * | 2016-01-28 | 2016-03-30 | 河南农业大学 | Method for rapidly predicting component content and photosynthetic hydrogen production potential of different types of straw biomass |
| CN105823863A (en) * | 2016-03-28 | 2016-08-03 | 华北电力大学（保定） | Coal quality on-line industrial analysis and measurement method based on constant temperature thermogravimetric analysis |
| CN106383934A (en) * | 2016-09-05 | 2017-02-08 | 中国矿业大学 | Construction method of coke quality prediction model and coking and coal blending method |
| CN106896033A (en) * | 2017-04-26 | 2017-06-27 | 安徽理工大学 | A kind of method of the content of organic matter in measure gangue |
| CN107632107A (en) * | 2017-08-14 | 2018-01-26 | 华中科技大学 | A kind of Burning Behavior For Pulverized Coal quick determination method |
| CN107677763A (en) * | 2017-10-12 | 2018-02-09 | 国网河北能源技术服务有限公司 | One kind simulation coal dust firing and flue gas pollutant generation test system and method |
| CN107764681A (en) * | 2017-10-16 | 2018-03-06 | 深圳市贝特瑞新能源材料股份有限公司 | A kind of fast appraisement method of burnt raw material |
Non-Patent Citations (4)
| Title |
|---|
| 傅杰文等: "污泥与煤在CO2/O2及N2/O2气氛条件下的混燃特性分析", 《环境科学学报》 * |
| 刘敬勇等: "不同来源污泥混燃特性及其综合燃烧性能评价", 《环境科学学报》 * |
| 唐子君: "城市污水污泥与煤混烧的热重试验研究", 《动力工程学报》 * |
| 邵志伟等: "O2/CO2气氛下污泥与烟煤混合燃烧特性", 《浙江大学学报（工学版）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766173A (en) * | 2019-04-02 | 2020-10-13 | 宝武炭材料科技有限公司 | Method for evaluating coke quality for lithium battery negative electrode material |
| CN113324868A (en) * | 2021-05-18 | 2021-08-31 | 北京科技大学 | Method for evaluating oxidizing property of magnetite |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108519301B (en) | 2020-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Structural features and gasification reactivity of biomass chars pyrolyzed in different atmospheres at high temperature | |
| El-Seesy et al. | Investigation of the effect of adding graphene oxide, graphene nanoplatelet, and multiwalled carbon nanotube additives with n-butanol-Jatropha methyl ester on a diesel engine performance | |
| Di Blasi et al. | Reactivities of some biomass chars in air | |
| López et al. | Oxy-combustion of corn, sunflower, rape and microalgae bioresidues and their blends from the perspective of thermogravimetric analysis | |
| Viswanathan et al. | Comprehensive study of engine characteristics of novel biodiesel from curry leaf (Murraya koenigii) oil in ceramic layered diesel engine | |
| Maček et al. | Ni–YSZ SOFC anodes—Minimization of carbon deposition | |
| Jones et al. | A comprehensive biomass combustion model | |
| CN108519301A (en) | It is a kind of to utilize thermogravimetric analyzer evaluation coal and the reactive method of biomass char | |
| CN108398022B (en) | For small-scale production coke and the Experiment Coke Oven and application method of gelatinous layer sample | |
| Aldana et al. | Thermogravimetric characterization and gasification of pecan nut shells | |
| CN108217649A (en) | A kind of coal activated carbon stove preparing active carbon method | |
| Subbarayan et al. | Experimental investigation of evaporation rate and exhaust emissions of diesel engine fuelled with cotton seed methyl ester and its blend with petro-diesel | |
| Seebold et al. | Thermophysical and chemical properties of bioliq slags | |
| Li et al. | Carburization behaviour of Mn–Cr–O spinel in high temperature hydrocarbon cracking environment | |
| CN105623685B (en) | A kind of continuous biomass raw material In-stiu catalysis gas, charcoal coproduction method and apparatus | |
| Zhang et al. | High temperature pyrolysis behaviour and kinetics of lump coal in COREX melter gasifier | |
| CN105136851B (en) | A kind of device and method for measuring fuel factor in carbonaceous macromolecular isothermal thermal process reactor | |
| Cong et al. | Comprehensive analysis of industrial-scale heating plants based on different biomass slow pyrolysis technologies: Product property, energy balance, and ecological impact | |
| Xu et al. | Combustion behaviors and characteristic parameters determination of sassafras wood under different heating conditions | |
| Zhou et al. | Sub-particle scale study on the melting behavior of Zhundong coal ash based on the heterogeneous distribution of elements | |
| Williams et al. | The fundamentals of biocarbon formation at elevated pressure: From 1851 to the 21st century | |
| CN106753476A (en) | A kind of quick cooling type fixture bed experiment apparatus and method for being pyrolyzed and gasifying dual-purpose | |
| CN203241396U (en) | Biomass briquette weightless combustion experiment table | |
| Xanthopoulou et al. | Deep oxidation of methane using catalysts and carriers produced by self-propagating high-temperature synthesis | |
| Qi et al. | Investigation on pulverized coal combustion behavior by non-isothermic integral thermogravimetry method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |