CN109406647A - A kind of gas chromatography analysis method measuring multi-component complex mixture - Google Patents
A kind of gas chromatography analysis method measuring multi-component complex mixture Download PDFInfo
- Publication number
- CN109406647A CN109406647A CN201811109050.8A CN201811109050A CN109406647A CN 109406647 A CN109406647 A CN 109406647A CN 201811109050 A CN201811109050 A CN 201811109050A CN 109406647 A CN109406647 A CN 109406647A
- Authority
- CN
- China
- Prior art keywords
- tcd
- fid
- component
- methane
- peak area
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
Abstract
The present invention is a kind of gas chromatography analysis method for measuring multi-component complex mixture.The core of this method is that external standard method and internal standard method is respectively adopted in the analysis detection of data correlation and product between thermal conductivity cell detector and hydrogen flame detector independently to carry out, it can also be to avoid the error of data correlation between two detectors, so that final calculated result is more accurate reliable in the case where chromatographic column can not be kept completely separate complex reaction product.This method can solve multi-component complex product as separating the problem of data are difficult to accurate correlation between different detectors caused by difficulty, requirement of the product analysis in the process to column performance is greatly reduced, there is good applicability and accuracy in the analytical calculation of multi-component complex product system.
Description
Technical field
The present invention provides a kind of chromatogram ration analysis methods for multi-component complex mixture, and in particular to arrives
The quantitative calculating of each component and the calculating of methane conversion and selectivity of product in methane aromatization product.
Background technique
The aromatic hydrocarbon products such as benzene, toluene are large basic chemicals important in modern chemical industry, at present mainly with petroleum
It is prepared for raw material route.It is in recent years larger and cheap with reserves due to crude oil reserve relative shortage and higher cost
Natural gas is great attention of the raw material route by academia and industrial circle.Wang Linsheng etc. [patent publication No. CN1102359A] is first
Secondary report can convert one step of methane to the aromatic hydrocarbon products such as benzene with Mo/HZSM-5 catalyst under anaerobic atmosphere, and react aobvious
Good selectivity is shown, the anaerobic aromatization of methane has attracted rapidly extensive concern both domestic and external since then.Methane anaerobic aromatization
Changing reaction product includes H2、CH4、C2H4、C2H6、C6H6、C7H8、C8H10、C10H8Etc. main components, since said components property is poor
It is different larger, generally, for light component H2、CH4、C2H4、C2H6Usually mainly by filling post separation and by thermal conductivity detector (TCD) into
Row analysis, and the heavy constituent of C6 or more then mainly separate by capillary chromatographic column and be divided by hydrogen flame detector
Analysis.Shu Yuying etc. applied patent " analysis method for the low-carbon alkanes anaerobic dehydrogenation aromatization reaction products such as methane " [in
State's patent 98114298.2].Shen Wenjie etc. has applied for " a kind of twin columns dual detector data from gas chromatography processing method ", and [China is specially
Benefit 03107379.4].The two realizes the full carbon analysis of oxygen-free aromatization reaction of methane product, all with CH4Believe as TCD and FID
Number associated bridge.But since methane can not separate in OV-101 capillary column with ethylene, ethane, cause in fid detector
In CH4Peak overlaps with ethylene, ethane peak, makes CH4Peak area measurement inaccuracy, so that TCD be made to be associated with production with FID signal
Raw error.When the low-carbon components content such as C2 is less in methane non oxidative aromatization product, the low-carbon components total peak area such as methane and C2
It approximate can regard as with the peak area of methane equal, the association of two detector datas can be based on the total of the low-carbons such as methane and C2
Peak area calculates, and the influence to final calculation result is little.However the distribution of methane aromatizing product is with the difference of catalyst
Larger difference is had, when the content of light component C2 is more, association error is larger, and calculated result can generate large error.Therefore
In the case of methane cannot separate very well in the chromatography column with low-carbon components such as C2, it is anti-how methane aromatizing to be accurately calculated
The content of product each component is answered, and the methane conversion, arenes selectivity and carbon deposit that finally calculate methane aromatization contain
Amount is just particularly important.
Summary of the invention
Being not completely separated present invention aim to address components certain in oxygen-free aromatization reaction of methane system causes
In the case where can not carrying out accurate correlations to two detector datas, provide a kind of pair of methane aromatizing production concentration measurement and
The method that methane conversion, aromatics yield and selectivity are accurately calculated.
Technical solution of the present invention is as follows.
A kind of gas chromatography analysis method measuring multi-component complex mixture, includes the following steps:
(1) by external standard method to pure component methane in thermal conductivity cell detector (TCD) and hydrogen flame detector (FID) letter
It number is associated, the peak area S based on methane in two detectors of TCD and FIDTCDAnd SFID, calculate the association factor F of methane
=STCD/SFID；
(2) using methane as reference substance, relative friction index of the test substance component in TCD and FID is measured；
(3) peak area of multi-component complex mixture corresponding component in TCD and FID is measured；
(4) respectively by each substance peak area detected in TCD and FID multiplied by corresponding relative friction index；
(5) by the association factor F of methane in (1), FID spectrogram peak area is transformed into TCD spectrogram corresponding peak face
Product；
(6) by the peak area of each substance in unified TCD, the molar concentration of each component in complex mixture is calculated.
A kind of gas chromatography analysis method measuring multi-component complex mixture, the specific steps are as follows:
(1) by external standard method to pure component methane in thermal conductivity cell detector (TCD) and hydrogen flame detector (FID) letter
It number is associated, the peak area based on methane in two detectors of TCD and FIDWithCalculate methane
Association factor:
(2) using methane as reference substance, relative friction index of the test substance component in TCD and FID is measured:
Using CH4 as reference substance, the relative friction index of any component i can be indicated in TCD detector are as follows:
M in formulai,Respectively indicate component i and CH in TCD detector4Mole, ATCD,i,Table respectively
Show component i and CH in TCD detector4Peak area；
Using CH4 as reference substance, the relative friction index of any component j can be indicated in fid detector are as follows:
M in formulaj,Respectively indicate component j and CH in fid detector4Mole, AFID,j,It respectively indicates
Component j and CH in fid detector4Peak area；
(3) peak area of multi-component complex mixture corresponding component in TCD and FID is measured；
(4) each substance peak area detected in TCD and FID is obtained multiplied by corresponding relative friction index respectively
ATCD,i·fTCD,iAnd AFID,j·fFID,j
(5) by the association factor F of methane in (1), FID spectrogram peak area is transformed into TCD spectrogram corresponding peak face
Product: AFID,j·fFID,j·F
(6) unify the peak area of each substance in TCD:
(7) molar content of multi-component complex mixing species each component is calculated:
The molar fraction of i component in mixture are as follows:
The molar fraction of methane in mixture are as follows:
The molar fraction of j component in mixture are as follows:
In the above method, in step (2), each gas relative friction index in TCD detector are as follows:
Each gas relative friction index of fid detector are as follows:
Compared with prior art, present invention has an advantage that
Advantage of the invention is that working as the feelings that oxygen-free aromatization reaction of methane product cannot be kept completely separate by double chromatographic columns
Also the accurate analysis to its product may be implemented under condition.One of the key of methane aromatizing product analysis be methane in TCD and
Signal is interrelated in fid detector.Since methane cannot fully achieve in capillary chromatographic column with low-carbon components such as C2
Separation, causes peak area when in metering methane fid detector bigger than normal, so as to cause methane in present analysis method at two
The association of signal generates error in detector.Core of the present invention is separately to carry out signal association process and product analysis process.
Association process is to be associated using the standard gas prepared by external standard method, so as to avoid product complicated in reaction process due to nothing
Method realizes the influence being kept completely separate to methane peak area quantification in capillary chromatographic column, makes association of the methane in two detectors
It is more accurate.Therefore, real reaction process is not necessarily to pay close attention to the separation degree of methane and low-carbon components in capillary chromatographic column, only needs
Pay close attention to capillary chromatographic column to the separation of aromatic hydrocarbons can, this requires chromatography significantly the column performance of capillary chromatographic column
Relax, there is very big operating flexibility in type selecting, simplify separation of the capillary chromatographic column to admixture of gas in gas-chromatography
Technique.This method can be generalized to the analysis detection of multi-component complex reaction product in other similar systems.
Detailed description of the invention
Peak area figure of Fig. 1 various concentration methane in TCD and fid detector；
Fig. 2 is methane anaerobic aromatization yield comparison diagram on 6wt%Mo/HZSM-5 catalyst.
Specific embodiment
The present invention will be further specifically described in detail with reference to specific embodiments, but embodiments of the present invention are not
It is limited to this, for not specifically specified technological parameter, can refer to routine techniques progress.
(1) external standard method is associated with
By carrying out separation detection to methane aromatizing product standard gas, standard gas component is as shown in table 1.Standard gas is through RB-5 capillary
Column and HayeSep D packed column respectively enter hydrogen flame detector and thermal conductivity cell detector after being separated, and measure each gas group
The peak area divided.
1 methane aromatizing product standard gas concentration of table
(1) methane association factor F is calculated
A series of peak area of the methane of concentration in TCD and fid detector is measured, as shown in table 2.By the peak in table 2
Area carries out data and is fitted to obtain Fig. 1.Calculate the signal degree of association of the methane in two detectors, the association factor of namely for methane.
2 various concentration methane of table peak area in TCD and fid detector
Calculate association factor of the methane in TCD and FID:
(2) relative friction index measures
Using methane as standard substance, the relative friction index of any component i can be indicated in sample are as follows:Wherein MiWithRespectively component i and CH4Mole, AiWithRespectively component i and CH4
Peak area.The relative friction index for measuring various substances in TCD and FID respectively, as shown in the following table 3 and table 4.
Each gas relative friction index in 3 TCD detector of table
Each gas relative friction index of 4 fid detector of table
(3) methane aromatizing standard gas testing result
Peak area of each gas component of methane aromatizing standard gas in TCD detector and fid detector, as a result such as 5 He of table
Shown in table 6.
The gas component peak area of 5 TCD detector of table detection
The gas component peak area of 6 fid detector of table detection
(4) peak area for respectively detecting TCD and FID is multiplied by relative friction index
TCD peak area * relative friction index
CH48393158.3*1=8393158.3
H27951998.6*0.3=2385599.6
N2284872.9*3.32=945778
C2H448709.4*1.25=60886.8
C2H655087.6*1.01=55638.5
FID peak area * relative friction index
C6H68713.9*0.16=1394.2
C7H83270.7*0.15=490.6
(5) FID peak area is gone into the corresponding peak area of TCD by association factor F
C6H61394.2*12.55=17497.2
C7H8490.6*12.55=6157
(6) total peak area that TCD is detected after converting:
CH4+H2+N2+C2H4+C2H6+C6H6+C7H8=8393158.3+2385599.6+945778+60886.8+55638.5
+ 17497.2+6157=11864715.7
(7) molar concentration of the various components of standard gas is calculated
CH48393158.3/11864715.7*100%=70.74%
H22385599.6/11864715.7*100%=20.11%
N2945778/11864715.7*100%=7.97%
C2H460886.8/11864715.7*100%=0.513%
C2H655638.5/11864715.7*100%=0.469%
C6H617497.2/11864715.7*100%=0.148%
C7H86157/11864715.7*100%=0.052%.
(8) standard gas concentration calculation value is compared with the actual value of standard gas concentration, analyzes the size of relative error, calculated
As a result such as the following table 7
The analysis result of 7 Standard Gases of table
It can be seen from Table 7 that being associated using substance peak of the external standard method to TCD and FID, gas concentration calculated
It is little with calibrating gas actual concentrations difference, it is believed that this gas chromatography analysis method is more accurate.Next to methane virtue
Methane conversion, arenes selectivity, the carbon distribution etc. of structureization reaction are calculated.
(2) internal standard method product analysis
Embodiment 1
Oxygen-free aromatization reaction of methane interpretation of result and calculating 2wt%Mo/HZSM- on 2wt%Mo/HZSM-5 catalyst
5 are prepared using infusion process.Oxygen-free aromatization reaction of methane carries out in the quartz ampoule fixed bed reactors that internal diameter is 9mm, is catalyzed
Agent loading amount is 0.3g, is handled 30 minutes at 700 DEG C with Ar, then switches 90%CH4/ 10%N2Unstripped gas is reacted.Methane gas
Body air speed is 1500ml*gcat -1*h-1, reaction pressure 1atm.Reaction product is divided after RB-5 and HayeSep D post separation
Not Jin Ru hydrogen flame and conductance cell detection, measure each gas component peak area respectively.With methane in 2wt% catalyst reaction
For the analysis and calculating of 120min.
Thermal conductivity cell detector data:
Hydrogen flame detector data:
Conductance cell detects unstripped gas peak area and content:
(1) TCD peak area * relative friction index
H2: 2651344.5*0.3=795403.4
N2: 232105.5*3.32=770590.3
CH4: 5722961.4*1=5722961.4
C2H4: 4260.6*1.25=5325.8
C2H6: 4297.3*1.01=4340.3
(2) FID peak area * relative friction index
C6H6: 19457.9*0.16=3113.3
C7H8: 1705.4*0.15=255.8
C10H8: 5378.9*0.1=537.9
(3) FID peak area is gone in corresponding TCD by transforming factor F:
C6H6: 3113.3*12.55=39071.9
C7H8: 255.8*12.55=3210.3
C10H8: 537.9*12.55=6750.6
(4) total peak area that TCD is detected after converting:
795403.4+770590.3+5722961.4+5325.8+4340.3+39071.9+3210.3+6750.6=
7347654
(5) content of each component:
H2: 795403.4/7347654*100%=10.8%
N2: 770590.3/7347654*100%=10.5%
CH4: 5722961.4/7347654*100%=77.9%
C2H4: 5325.8/7347654*100%=0.074%
C2H6: 4340.3/7347654*100%=0.06%
C6H6: 39071.9/7347654*100%=0.532%
C7H8: 3210.3/7347654*100%=0.044%
C10H8: 6750.6/7347654*100%=0.092%
(6) methane conversion:
Respectively indicate the molar flow of inlet and outlet methane
The selectivity of i component:
Nc,iIndicate the carbon number that i component contains, such as C6H6Nc=6
Ji,outIndicate i component in the molar flow in exit
The yield of i component:
Methane conversion:
Selectivity:
SC2=(2* (0.074+0.06) * 10.7/10.5)/(89.3-77.9*10.7/10.5) * 100%=2.75%
Coking: SC=1-2.75%-32.8%-3.16%-9.45%=51.84%
Products collection efficiency:
YC2=11.1%*2.75%=0.31%
Coking: YC=11.1%*51.84%=5.75%
8 methane of table anaerobic aromatization on 2wt%Mo/HZSM-5 catalyst analyzes result
Embodiment 2
The analysis result of oxygen-free aromatization reaction of methane on 4wt%Mo/HZSM-5 catalyst
4wt%Mo/HZSM-5 is prepared using infusion process.Oxygen-free aromatization reaction of methane is solid in the quartz ampoule that internal diameter is 9mm
It is carried out in fixed bed reactor, catalyst loading 0.5g, is handled 30 minutes at 700 DEG C with Ar, then switch 90%CH4/ 10%N2
Unstripped gas is reacted.Methane gas air speed is 1200ml*gcat -1*h-1, reaction pressure 1atm.Reaction product passes through RB-5
With respectively enterd after HayeSep D post separation hydrogen flame and conductance cell detection, measure each gas component peak area.Then analysis meter
Calculate the conversion ratio of methane and the selectivity such as table 9 of product in oxygen-free aromatization reaction of methane.
9 methane of table anaerobic aromatization on 4wt%Mo/HZSM-5 catalyst analyzes result
Embodiment 3
Oxygen-free aromatization reaction of methane interpretation of result and calculating on 6wt%Mo/HZSM-5 catalyst
6wt%Mo/HZSM-5 is prepared using infusion process.Oxygen-free aromatization reaction of methane is solid in the quartz ampoule that internal diameter is 9mm
It is carried out in fixed bed reactor, catalyst loading 0.5g, is handled 30 minutes at 700 DEG C with Ar, then switch 90%CH4/ 10%N2
Unstripped gas is reacted.Methane gas air speed is 900ml*gcat -1*h-1, reaction pressure 1atm.Reaction product by RB-5 and
Hydrogen flame and conductance cell detection are respectively enterd after HayeSep D post separation, measure each gas component peak area.Analytical calculation methane
The conversion ratio of oxygen-free aromatization reaction methane and the selectivity such as table 10 of product.
10 methane of table anaerobic aromatization on 6wt%Mo/HZSM-5 catalyst analyzes result
It is compared by the result calculated with 98114298.2 method of Chinese patent, due to capillary color in association process
Spectrum column eliminates the influence of low-carbon alkene to quantifying for methane, and the practical peak area of methane is not than eliminating in hydrogen flame detector
Want less than normal before influence so that the final results of calculation of aromatics yield be intended to it is bigger than normal.The result that two methods calculate
It is illustrated in fig. 2 shown below, the calculated result of this method is more accurate.
Claims (3)
1. a kind of gas chromatography analysis method for measuring multi-component complex mixture, which comprises the steps of:
(1) by external standard method to pure component methane in thermal conductivity cell detector (TCD) and hydrogen flame detector (FID) signal into
Row association, the peak area S based on methane in two detectors of TCD and FIDTCDAnd SFID, calculate the association factor F=of methane
STCD/SFID；
(2) using methane as reference substance, relative friction index of the test substance component in TCD and FID is measured；
(3) peak area of multi-component complex mixture corresponding component in TCD and FID is measured；
(4) respectively by each substance peak area detected in TCD and FID multiplied by corresponding relative friction index；
(5) by the association factor F of methane in (1), FID spectrogram peak area is transformed into corresponding peak area in TCD spectrogram；
(6) by the peak area of each substance in unified TCD, the molar concentration of each component in complex mixture is calculated.
2. measuring the gas chromatography analysis method of multi-component complex mixture according to claim 1, which is characterized in that specific
Steps are as follows:
(1) by external standard method to pure component methane in thermal conductivity cell detector (TCD) and hydrogen flame detector (FID) signal into
Row association, the peak area based on methane in two detectors of TCD and FIDWithCalculate the association of methane
The factor:
(2) using methane as reference substance, relative friction index of the test substance component in TCD and FID is measured:
Using CH4 as reference substance, the relative friction index of any component i can be indicated in TCD detector are as follows:
M in formulai,Respectively indicate component i and CH in TCD detector4Mole, ATCD,i,Respectively indicate TCD
Component i and CH in detector4Peak area；
Using CH4 as reference substance, the relative friction index of any component j can be indicated in fid detector are as follows:
M in formulaj,Respectively indicate component j and CH in fid detector4Mole, AFID,j,Respectively indicate FID
Component j and CH in detector4Peak area；
(3) peak area of multi-component complex mixture corresponding component in TCD and FID is measured；
(4) each substance peak area detected in TCD and FID is obtained into A multiplied by corresponding relative friction index respectivelyTCD,i·
fTCD,iAnd AFID,j·fFID,j
(5) by the association factor F of methane in (1), FID spectrogram peak area is transformed into corresponding peak area in TCD spectrogram:
AFID,j·fFID,j·F
(6) unify the peak area of each substance in TCD:
(7) molar content of multi-component complex mixing species each component is calculated:
The molar fraction of i component in mixture are as follows:
The molar fraction of methane in mixture are as follows:
The molar fraction of j component in mixture are as follows:
3. measuring the gas chromatography analysis method of multi-component complex mixture according to claim 1, which is characterized in that step
(2) in, each gas relative friction index in TCD detector are as follows:
Each gas relative friction index of fid detector are as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811109050.8A CN109406647A (en) | 2018-09-21 | 2018-09-21 | A kind of gas chromatography analysis method measuring multi-component complex mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811109050.8A CN109406647A (en) | 2018-09-21 | 2018-09-21 | A kind of gas chromatography analysis method measuring multi-component complex mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109406647A true CN109406647A (en) | 2019-03-01 |
Family
ID=65465196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811109050.8A Pending CN109406647A (en) | 2018-09-21 | 2018-09-21 | A kind of gas chromatography analysis method measuring multi-component complex mixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109406647A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505188A (en) * | 2020-03-20 | 2020-08-07 | 合肥固泰自动化有限公司 | Volatile organic compounds VOCs multichannel on-line monitoring system |
| CN112834562A (en) * | 2021-01-04 | 2021-05-25 | 吉林大学 | Device and method for detecting helium concentration in heat-conducting mixed gas |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247103A (en) * | 1998-09-09 | 2000-03-15 | 中国科学院大连化学物理研究所 | Process for analyzing resultants from non-oxygen dehydroaromatization reaction of low-carbon alkanes (methane) |
| CN1532546A (en) * | 2003-03-25 | 2004-09-29 | 中国科学院大连化学物理研究所 | Data processing method of double column double detector gas chromatograply |
| CN102650624A (en) * | 2011-02-28 | 2012-08-29 | 中国石油化工股份有限公司 | Analysis method for hydrocarbon gas mixture with oxygen compounds |
| JP2013068501A (en) * | 2011-09-22 | 2013-04-18 | Shimadzu Corp | Gas chromatograph detector |
| CN103293258A (en) * | 2012-02-24 | 2013-09-11 | 青岛海洋地质研究所 | Device and method for analyzing composition of natural gas hydrate gas |
| CN106153431A (en) * | 2016-07-21 | 2016-11-23 | 中国科学院山西煤炭化学研究所 | The detection method of a kind of quick mensuration raw gas composition and device thereof |
-
2018
- 2018-09-21 CN CN201811109050.8A patent/CN109406647A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247103A (en) * | 1998-09-09 | 2000-03-15 | 中国科学院大连化学物理研究所 | Process for analyzing resultants from non-oxygen dehydroaromatization reaction of low-carbon alkanes (methane) |
| CN1532546A (en) * | 2003-03-25 | 2004-09-29 | 中国科学院大连化学物理研究所 | Data processing method of double column double detector gas chromatograply |
| CN102650624A (en) * | 2011-02-28 | 2012-08-29 | 中国石油化工股份有限公司 | Analysis method for hydrocarbon gas mixture with oxygen compounds |
| JP2013068501A (en) * | 2011-09-22 | 2013-04-18 | Shimadzu Corp | Gas chromatograph detector |
| CN103293258A (en) * | 2012-02-24 | 2013-09-11 | 青岛海洋地质研究所 | Device and method for analyzing composition of natural gas hydrate gas |
| CN106153431A (en) * | 2016-07-21 | 2016-11-23 | 中国科学院山西煤炭化学研究所 | The detection method of a kind of quick mensuration raw gas composition and device thereof |
Non-Patent Citations (2)
| Title |
|---|
| BUDIMAN, H 等: "Comparison between GC-TCD and GC-FID for the determination of propane in gas mixture", 《INTERNATIONAL SYMPOSIUM ON APPLIED CHEMISTRY 2015》 * |
| 薛连海 等: "气相色谱FID、TCD在外标定量法中应注意的问题", 《吉林化工学院学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505188A (en) * | 2020-03-20 | 2020-08-07 | 合肥固泰自动化有限公司 | Volatile organic compounds VOCs multichannel on-line monitoring system |
| CN112834562A (en) * | 2021-01-04 | 2021-05-25 | 吉林大学 | Device and method for detecting helium concentration in heat-conducting mixed gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101887051B (en) | Online chromatographic analysis method | |
| US10215737B2 (en) | Apparatus for and method of gas analysis | |
| CN102253136B (en) | Method for analyzing carbon isotopes of micro single hydrocarbons in natural gas | |
| CN201440135U (en) | Multifunctional gas chromatograph gas path flow | |
| CN101887052B (en) | Online chromatographic analysis device | |
| CN109073617B (en) | Method for detecting and quantifying oxygen in oxidizable compounds | |
| Kamiński et al. | Determination of carbon monoxide, methane and carbon dioxide in refinery hydrogen gases and air by gas chromatography | |
| CN109406647A (en) | A kind of gas chromatography analysis method measuring multi-component complex mixture | |
| CN101893610A (en) | Method for analyzing mixed light hydrocarbons by conjunctive use of ten-way valve and six-way valve | |
| CN100507557C (en) | Method for online analyzing mixture containing arene | |
| CN103257186B (en) | Method of determining content of oxygen-containing compounds in F-T synthetic oil by GC/O-FID | |
| CN113125603A (en) | Performance detection system of transformer oil chromatographic on-line monitoring device | |
| CN204154690U (en) | For the synthesis of the tripping device of gas producing light olefins product | |
| Wang et al. | Quantified MS analysis applied to combinatorial heterogeneous catalyst libraries | |
| Gravelle | Application of adsorption calorimetry to the study of heterogeneous catalysis reactions | |
| CN212586315U (en) | Carbon isotope separation and enrichment device for hydrocarbon gas components in natural gas | |
| CN101131355A (en) | Method for fast measuring carbon content in solid catalyst | |
| CN102650624B (en) | Analysis method for hydrocarbon gas mixture with oxygen compounds | |
| CN101819192A (en) | Method for detecting naphthalene content in washing oil by gas chromatography | |
| CN106483242B (en) | A kind of method of evaluating performance of preparing propylene by dehydrogenating propane catalyst | |
| CN2569134Y (en) | Hydrogen content detector | |
| CN207488247U (en) | Methanol-to-olefins product two-dimensional gas chromatography on-line measuring device | |
| CN109856286B (en) | Method for detecting trace benzene in methyl tert-butyl ether | |
| CN117054540A (en) | Method for detecting dissolved gas in insulating oil of oil-filled electrical equipment | |
| CN117007709A (en) | Device for detecting dissolved gas in insulating oil of oil-filled electrical equipment |
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 |