Method for analyzing mixed light hydrocarbons by conjunctive use of ten-way valve and six-way valve
A combined analysis and six-way valve technology, applied in the field of chromatographic analysis, can solve the problems of high error probability and unsuitability for micro analysis, and achieve the effects of reduced hardware costs, reliable quantitative results, and strong flexibility
Inactive Publication Date: 2010-11-24
SHANDONG DAQI CHEM SCI & TECH
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This method is characterized by low requirements on instruments and chromatographic separation systems or conditions, and the optimization of the instruments or analysis conditions of each dedicated system is extremely convenient, but it requires multiple injections and correlation calculations, so the probability of introducing errors is relatively high , not suitable for microanalysis requirements
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[0017] like figure 1 As shown, the analysis system is composed of two sampling analysis systems, System I and System II. System I includes ten-port valve 1, which is connected to pre-column 2, analytical column 3 and damping column 4 respectively, and analytical column 3 is emptied. The damping column 4 is connected to the thermal conductivity detector 5, which is mainly used for the analysis of permanent gases; the system II includes a six-way valve 8, which is connected to a capillary analysis column 10 and a hydrogen flame ionization detector 11, which can be used for hydrocarbon gases Or other gas sample analysis that can be quantitatively detected by FID; ten-way valve 1 and six-way valve 8 are connected. Quantitative tubes (7, 9) are also respectively arranged on it.
[0018] figure 2 It is the full analysis spectrum of C4 liquefied gas, specifically the liquefied gas after etherification, which is detected by the external standard method, and the results are as follo...
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The invention discloses a method for analyzing mixed light hydrocarbons by the conjunctive use of a ten-way valve and a six-way valve, which belongs to the field of chromatographic analysis. In the method, an analysis system is involved. The method is characterized in that: the analysis system consists of two feeding analysis systems I and II, wherein the system I comprises the ten-way valve which is connected with a pre-column, an analysis column and a damping column respectively; the damping column is connected with a thermal conductivity detector, and is mainly used for analyzing permanent gases; the system II comprises the six valve which is connected with a capillary analytical column and a flame ionization detector, and can be used for analyzing hydrocarbon gases or other gas samples which can be quantitatively detected by the flame ionization detector; and the ten-way valve is connected with the six-way valve. In the method, based on the conjunctive use of the electric ten-way valve and the six-way valve, the pre-column is utilized to perform back plushing to realize once feeding detection fast and in parallel, so the analysis speed, the amount of information, reliability, application flexibility and the like are greatly improved.
Description
technical field [0001] The method belongs to the field of chromatographic analysis, and is specifically a method for jointly analyzing mixed low-carbon hydrocarbons by using a ten-way valve and a six-way valve. Background technique [0002] Chromatographic analysis is the most commonly used analysis method in chemical production, especially in the overall analysis of various low-carbon hydrocarbon gases such as refinery gas, liquefied petroleum gas, catalytic reforming gas, catalytic cracking gas, coking gas, steam cracking gas, etc. . In the past, single-column multiple gas chromatographs were often used for analysis. The basic idea is to use several independent chromatographs to measure different components in gas samples, and then correlate calculations to obtain complete gas composition analysis results. This method is characterized by low requirements on instruments and chromatographic separation systems or conditions, and the optimization of the instruments or analysi...
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Inventor 宋金富许秋燕高福利王衍法
Owner SHANDONG DAQI CHEM SCI & TECH