CN104194808A - Method for catalytic pyrolysis of rice hulls - Google Patents
Method for catalytic pyrolysis of rice hulls Download PDFInfo
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- CN104194808A CN104194808A CN201410391217.XA CN201410391217A CN104194808A CN 104194808 A CN104194808 A CN 104194808A CN 201410391217 A CN201410391217 A CN 201410391217A CN 104194808 A CN104194808 A CN 104194808A
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- rice husk
- croci
- catalysis
- catalyse pyrolysis
- pyrolysis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The invention discloses a method for catalytic pyrolysis of rice hulls, belonging to the technical field of energy sources. By taking Wuyunjing No.7 rice hulls as an experimental raw material, the weight loss ratios (DT) before and after catalysis, the weight loss rate (DTG) and change of activation energy are calculated by virtue of adding ferric oxide powder as a catalyst. Experimental results show that the rice hulls can be more thoroughly pyrolyzed under the catalytic effect of ferric oxide, the activation energy is decreased by about 10%, and the rice hulls are more fully utilized.
Description
Technical field
The present invention relates to a kind of method for rice husk catalyse pyrolysis, belong to energy technology field.
Background technology
Rice husk is one of important agricultural wastes, only China's output of 4,000 ten thousand tons of just having an appointment every year.As a kind of reproducible biomass resource, rice husk is typically used as fuel and directly burns so that heat to be provided, but utilizes grade relatively low.Pyrolysis is one of hot spot technology of current biomass research, by pyrolysis, rice husk can be converted into high-grade combustible gas and easily storage, transportation and the high tar of energy density, and the industrial gac being in great demand and the soft silica with high added value.
Pyrolysis refers in the situation that there is no the participation of oxygen-containing gas medium, thereby the simple heat of utilizing makes the organism generation decomposition in biomass remove volatile matter, and forms the process of solid-state semicoke or coke.Pyrolysis product comprises three kinds of gas, liquid and solids, and wherein gas can directly be used as fuel; Liquid can pass through further separation and extraction fuel made oil and industrial chemicals; Solid can be used as the required gac of Chemical Manufacture etc.
The interior conditions such as the external conditionss such as temperature of reaction, temperature rise rate and gas residence time and biomass chemical composition, size and heat conductivility all can exert an influence to ultimate yield, component and the proportion of biomass pyrolytic characteristic and each phase product, China grasps the fundamental characteristics of rice husk thermal decomposition at present substantially, therefore but also relatively less for the research that how to improve degree of pyrolysis, to have the catalyzer of catalyse pyrolysis effect be the emphasis of Study on Pyrolysis in preparation.
Summary of the invention
The object of the present invention is to provide a kind of method for rice husk catalyse pyrolysis.Choose No. 7 rice husks of military fortune round-grained rice as experimental raw, by adding croci as catalyzer, calculating its catalysis front and back rate of weight loss (DT), weight loss rate (DTG) and activation energy changes, experimental result shows, rice husk can pyrolysis under the katalysis of ferric oxide more thorough, activation energy has reduced 10% left and right, is more conducive to making full use of of rice husk.
Realizing technical scheme of the present invention is:
For a new application for catalysis rice husk thermal decomposition, described catalyzer is croci, and particle diameter is >=100 orders.Experiment material is No. 7 rice husks of military fortune round-grained rice, utilizes pulverizer to be ground into particle diameter≤1mm, dry 24h at 105 ℃.Experiment is carried out under permanent differential thermal balance.
In the present invention, cross and add croci for the catalyse pyrolysis of rice husk, concrete steps are as follows:
1) rice husk is pulverized, and in loft drier, dry obtaining is dried base, filters out croci simultaneously;
2) rice husk and croci are mixed, and stir;
3) respectively the rice husk before and after catalysis is carried out to Pyrolysis Experiment research, and experimental data is analyzed.
Step 1) in, rice husk powder particle diameter is≤1mm, and drying temperature is 95-105 ℃, and be 16-24h time of drying; Croci particle diameter >=100 order.
Step 2), in, the quality of croci accounts for the 10%-20% of rice husk quality.
Step 3), in, experiment research is non-isothermal method, respectively with 5 ℃/min, 10 ℃/min, 15 ℃/min, 20 ℃/min heated sample to 700-1000 ℃; Calculating catalysis front and back rate of weight loss, weight loss rate and activation energy changes.Interpretation method is Coats-Redfern method.
Compared with prior art, its remarkable advantage is in the present invention:
(1) ferric oxide is comparatively cheap as catalyzer, thereby catalysis cost is lower.
(2) ferric oxide easily obtains, and without processing treatment, simplifies catalytic step.
(3) compare with conventional basic metal catalysis, ferric oxide is comparatively stable, is applicable to recycled for multiple times.
Accompanying drawing explanation
Fig. 1 rice husk thermal decomposition TG curve.
Fig. 2 rice husk catalyse pyrolysis TG curve.
The ln[G of Fig. 3 rice husk (α)/T
2]-1/RT linear relationship chart.
Ln[G (the α)/T of Fig. 4 rice husk catalysis
2]-1/RT linear relationship chart.
Embodiment
For a new application for catalysis rice husk thermal decomposition, described catalyzer is croci, and particle diameter is >=100 orders.Experiment material is No. 7 rice husks of military fortune round-grained rice, utilizes pulverizer to be ground into particle diameter≤1mm, dry 24h at 105 ℃.Experiment is carried out under permanent differential thermal balance.
In the present invention, cross and add croci for the catalyse pyrolysis of rice husk, concrete steps are as follows:
1) rice husk is pulverized, and in loft drier, dry obtaining is dried base, filters out croci simultaneously;
2) rice husk and croci are mixed, and stir;
3) respectively the rice husk before and after catalysis is carried out to Pyrolysis Experiment research, and experimental data is analyzed.
Step 1) in, rice husk powder particle diameter is≤1mm, and drying temperature is 95-105 ℃, and be 16-24h time of drying; Croci particle diameter >=100 order.
Step 2), in, the quality of croci accounts for the 10%-20% of rice husk quality.
Step 3), in, experiment research is non-isothermal method, respectively with 5 ℃/min, 10 ℃/min, 15 ℃/min, 20 ℃/min heated sample to 700-1000 ℃; Calculating catalysis front and back rate of weight loss, weight loss rate and activation energy changes.Interpretation method is Coats-Redfern method.
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Embodiment 1
Produce the rice husk of particle diameter≤1mm, at 105 ℃, be dried, be 24h time of drying, take 5.0mg rice husk and 1mg croci, after fully mixing, add in differential thermal balance, utilize non-isothermal method respectively with 5 ℃/min, 10 ℃/min, 15 ℃/min, 20 ℃/min heated sample to 1000 ℃, obtain weight-loss curve, and obtain respectively weight-loss curve curve, as Fig. 1 and Fig. 2.
More known by two figure, when temperature reaches 390 ℃, the weightlessness of pure rice husk is about about 60%-65%, and the weightlessness of rice husk that adds ferric oxide catalysis is about 53%-58% left and right, and description of test adds ferric oxide can make rice husk thermal decomposition more thorough.
Utilize Coats-Redfern method to calculate the activation energy of catalysis front and back, its integrated form is ln[G (α)/T
2]=ln[(AR)/(Β E)]-E/ (RT), makes ln[G (α)/T
2]-1/RT relation curve, as Fig. 3 and Fig. 4, its slope is activation energy.
According to calculating, the activation energy 117.47KJ/mol of rice husk thermal decomposition, the activation energy that adds the rice husk thermal decomposition of ferric oxide catalysis is 104.97KJ/mol.Experiment draws by adding the catalysis of ferric oxide, makes the activation energy of rice husk thermal decomposition reduce by 10% left and right, makes reaction be more prone to occur, and is conducive to industrial scale operation.
Embodiment 2
Produce the rice husk of particle diameter≤1mm, at 95 ℃, be dried, be 16h time of drying, take 5.0mg rice husk and 2mg croci, after fully mixing, add in differential thermal balance, utilize non-isothermal method respectively with 5 ℃/min, 10 ℃/min, 15 ℃/min, 20 ℃/min heated sample to 800 ℃, obtain weight-loss curve, and obtain respectively weight-loss curve curve.
Embodiment 3
Produce the rice husk of particle diameter≤1mm, at 100 ℃, be dried, be 20h time of drying, take 5.0mg rice husk and 1.5mg croci, after fully mixing, add in differential thermal balance, utilize non-isothermal method respectively with 5 ℃/min, 10 ℃/min, 15 ℃/min, 20 ℃/min heated sample to 900 ℃, obtain weight-loss curve, and obtain respectively weight-loss curve curve.
Claims (5)
1. for a method for rice husk catalyse pyrolysis, it is characterized in that, by adding croci for the catalyse pyrolysis of rice husk, concrete steps are as follows:
1) rice husk is pulverized, and in loft drier, dry obtaining is dried base, filters out croci simultaneously;
2) rice husk and croci are mixed, and stir;
3) respectively the rice husk before and after catalysis is carried out to Pyrolysis Experiment research, and experimental data is analyzed.
2. the method for rice husk catalyse pyrolysis according to claim 1, is characterized in that step 1) in, rice husk powder particle diameter is≤1mm, and drying temperature is 95-105 ℃, and be 16-24h time of drying; Croci particle diameter >=100 order.
3. the method for rice husk catalyse pyrolysis according to claim 1, is characterized in that step 2) in, the quality of croci accounts for the 10%-20% of rice husk quality.
4. the method for rice husk catalyse pyrolysis according to claim 1, is characterized in that step 3) in, experiment research is non-isothermal method, respectively with 5 ℃/min, 10 ℃/min, 15 ℃/min, 20 ℃/min heated sample to 700-1000 ℃; Calculating catalysis front and back rate of weight loss, weight loss rate and activation energy changes.
5. the method for rice husk catalyse pyrolysis according to claim 4, is characterized in that, interpretation method is Coats-Redfern method.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680003A (en) * | 2015-02-11 | 2015-06-03 | 中原工学院 | Prediction method for hydrothermal coke yield |
| CN105419829A (en) * | 2015-10-09 | 2016-03-23 | 青海威德生物技术有限公司 | Method for preparing biomass gas by pyrolyzing chicory residues |
| CN109097077A (en) * | 2018-10-19 | 2018-12-28 | 上海理工大学 | A kind of method of CO yield in reduction catalytic pyrolysis of biomass |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717651A (en) * | 2008-10-09 | 2010-06-02 | 陈志文 | Pyrolyzing system using oxygen-containing medium |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717651A (en) * | 2008-10-09 | 2010-06-02 | 陈志文 | Pyrolyzing system using oxygen-containing medium |
Non-Patent Citations (3)
| Title |
|---|
| 付鹏等: "非等温热重分析研究生物质催化气化特性", 《电站系统工程》 * |
| 卢红伟: "生物质催化热解实验研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 谢新苹等: "Py-GC/MS对稻壳催化裂解液体产物分析", 《现代化工》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680003A (en) * | 2015-02-11 | 2015-06-03 | 中原工学院 | Prediction method for hydrothermal coke yield |
| CN104680003B (en) * | 2015-02-11 | 2017-07-14 | 中原工学院 | A kind of Forecasting Methodology of hydro-thermal coke yield |
| CN105419829A (en) * | 2015-10-09 | 2016-03-23 | 青海威德生物技术有限公司 | Method for preparing biomass gas by pyrolyzing chicory residues |
| CN105419829B (en) * | 2015-10-09 | 2018-05-11 | 青海威德生物技术有限公司 | A kind of method for being pyrolyzed witloof residue and preparing biogas |
| CN109097077A (en) * | 2018-10-19 | 2018-12-28 | 上海理工大学 | A kind of method of CO yield in reduction catalytic pyrolysis of biomass |
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