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Method for analyzing composition of alcohol-containing gasoline and alcohol adsorption material used thereby

An adsorption material and gasoline technology, which is applied in the field of analyzing the composition of alcohol-containing gasoline, and can solve problems such as complex operation procedures

Active Publication Date: 2005-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method sets adsorption traps for various substances in the carrier gas path, including alcohol traps, polar columns, non-polar columns, olefin traps, molecular sieve columns, ether-alcohol-aromatic traps and a hydrogenation catalyst section, which can be used for Determination of the content of alkanes, olefins, benzene, aromatics, ethers, and alcohols in gasoline, but the operation process is too complicated, and for gasoline with an olefin content higher than 13%, it needs to be diluted to determine

Method used

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  • Method for analyzing composition of alcohol-containing gasoline and alcohol adsorption material used thereby
  • Method for analyzing composition of alcohol-containing gasoline and alcohol adsorption material used thereby
  • Method for analyzing composition of alcohol-containing gasoline and alcohol adsorption material used thereby

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preparation example Construction

[0020] The preparation method of the alcohol adsorption material of the present invention is: mix diatomite powder with an appropriate amount of water, the mass ratio of water to diatomite is 0.5-6.5:1, stir evenly, and make block or other shapes, such as making Form into pellets, strips, granules, and then dry at a temperature of 20-120°C. After drying, it is calcined at 500-1000°C, preferably 600-900°C. The calcined block diatomite is pulverized into particles of 0.18-0.30 mm to obtain the carrier.

[0021] The above carrier is impregnated with anhydrous calcium chloride aqueous solution, the impregnation temperature is 20-100°C, preferably 20-50°C, the time is preferably 0.5-3.0 hours, the concentration of the calcium chloride aqueous solution used for impregnation is 1.0-40% by mass, during impregnation The liquid / solid volume ratio of the impregnation liquid to the carrier is 0.9-2.0:1, preferably 0.9-1.2:1. After impregnation, the solid is dried at 80-180° C. for prefe...

example 1

[0031] Preparation of the support for the alcohol trap used in the method of the invention.

[0032] Mix diatomite raw ore powder (produced by Shanwang Chemical Co., Ltd. in Linqu, Shandong) and deionized water at a mass ratio of 1:1, dry at 110°C for 5 hours, roast at 900°C for 7 hours, and place in the deionized water while it is hot. Cool in sub water. Filter, dry at 110°C for 5 hours, pulverize with a ball mill, sieve into particles of 0.18-0.3 mm, wash with deionized water until no powder appears, and dry at 120°C for 5 hours to obtain carrier Z 1 , and its physical and chemical properties are listed in Table 1. The pore diameter, pore volume, and pore distribution in Table 1 were measured by mercury intrusion porosimetry, and the specific surface area was measured by low-temperature nitrogen adsorption method.

example 2

[0034] Prepare carrier Z by the method for example 1 2 , the difference is that the calcination temperature is 950°C, and the prepared carrier Z 2 The physical and chemical properties are listed in Table 1.

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Abstract

The multidimensional gas chromatographic process of analyzing the composition of alcohol containing gasoline includes injecting gasoline sample into multidimensional gas chromatograph to separate aliphatic hydrocarbon and arene from alcohol, leading the aliphatic hydrocarbon flowing out from the polar chromatographic column to olefin well for adsorbing olefin therein, detecting the saturated hydrocarbon from the olefin well, detaching olefin well from the carrier gas flow path, detecting benzene in alcohol well, reverse blowing the polar chromatographic column with carrier gas, adsorbing alcohol in the alcohol well, detecting arene, desorbing and detecting olefin and desorbing and detecting alcohol. The alcohol adsorbing material includes CaCl2 20-50 wt% and diatomite as carrier 50-80 wt%. The said process can detect hydrocarbon, benzene, arene, olefin and alcohol content in gasoline effectively.

Description

technical field [0001] The invention relates to a method for analyzing the composition of gasoline by using multi-dimensional gas chromatography, specifically, a method for analyzing the composition of alcohol-containing gasoline. Background technique [0002] With the increasing requirements for environmental protection, the national vehicle exhaust emission standards are becoming more and more stringent. Therefore, refineries are required to produce high-quality gasoline to reduce emissions of harmful substances. my country's new unleaded gasoline standard (GB17930-1999) stipulates that the aromatics content is ≤40 (volume)%, the olefin content is ≤35 (volume)%, the sulfur content is ≤0.08 (volume)%, and the benzene content is ≤2.5 (volume)%. [0003] In order to meet the above standards and improve the combustion performance of gasoline, oxygen-containing compounds such as methyl tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE), tert-amyl methyl ether (TAME), diiso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/30G01N30/46
Inventor 高秀香徐广通陆婉珍
Owner CHINA PETROLEUM & CHEM CORP
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