Thermal cracker, thermal cracking gas chromatograph and thermal cracking analysis method

A technology of gas chromatograph and gas chromatographic column, which is applied in the field of pyrolysis gas chromatograph and its pyrolysis analysis, can solve the problems of low temperature, slow heating rate, poor sample analysis reproducibility, etc., achieve fast analysis speed, eliminate Error, the effect of improving reproducibility

Active Publication Date: 2011-09-21
上海市计算技术研究所
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Problems solved by technology

However, only the R200 pyrolyzer produced by Shanghai Kechuang Instrument Co., Ltd. in China uses the traditional hot wire heating method in th

Method used

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  • Thermal cracker, thermal cracking gas chromatograph and thermal cracking analysis method
  • Thermal cracker, thermal cracking gas chromatograph and thermal cracking analysis method
  • Thermal cracker, thermal cracking gas chromatograph and thermal cracking analysis method

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Embodiment 1

[0065]Now industrial production of ethylene mostly uses heavy oil as raw material. After the heavy oil is cracked, not only ethylene, but also propylene, diolefins and aromatics with relatively large molecular weight are produced. Therefore, the evaluation of raw materials is of great significance in the industrial production of ethylene. The classic evaluation method is to measure the component ratio in the cracking product through pilot production, such as the ratio of paraffins, olefins, cyclic hydrocarbons, and aromatics. This method, although useful, is costly and time-consuming. The product cannot be analyzed by conventional gas chromatography because naphtha requires high temperatures to be completely cracked. Utilizing the pyrolysis gas chromatograph in the present invention can be very convenient for him to evaluate the raw materials.

[0066] like Figure 4 It is a pyrolysis spectrum of naphtha raw material for ethylene production. It can decompose each component of...

Embodiment 2

[0068] Comparative experiment: Instrument: GC-MS coupled instrument, capillary gas chromatography column 30m×0.32mm×0.25μm,

[0069] Reagents: polystyrene powder (to be tested), toluene, ethylbenzene, polystyrene standard sample.

[0070] Working conditions: carrier gas: nitrogen, flow rate: 2-4mL / min, prepare standard solutions of toluene, ethylbenzene, and styrene respectively, and use DMF as the standard solution.

[0071] Experimental method: the internal standard method is used to draw the standard brick experimental curve, and then the solution prepared with accurately weighed polyethylene powder is used for the same sample injection operation each time, and a parallel experiment is carried out, and then the analysis data results of each time are analyzed. Take measurements. The results showed that the RSD of the above 6 groups of data was less than 5.6%.

[0072] like Image 6 Shown are the analytical spectra drawn under the conditions: 1. Propylene, 2. Propane, 3. 1...

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Abstract

The invention relates to a thermal cracker, a thermal cracking gas chromatograph and a thermal cracking analysis method, which relate to the technical field of thermal cracking gas chromatography. The thermal cracker comprises a sample feeding device, a thermal cracking chamber, an electrical heating furnace, a carrier gas circuit and a control system, wherein the sample feeding device is connected with the thermal cracking chamber; the carrier gas circuit is connected with the upper end of the thermal cracking chamber; the electrical heating furnace is arranged at the periphery of the thermal cracking chamber; a sample carrying element is arranged in the thermal cracking chamber; the sample feeding device comprises a sample cup for containing a sample to be tested and a control button; and the control system is connected with the electrical heating furnace and used for controlling the temperature and the time of the electrical heating furnace. The sample feeding passage of the sample feeding device of the thermal cracker is vertical to a horizontal plane, so that secondary reaction can be minimized, the reproducibility of a chromatogram can be ensured, and the difference caused by manual operation can be eliminated maximally. The thermal cracking gas chromatograph comprises a capillary gas chromatographic column, wherein the outlet of the thermal cracker is connected with the capillary gas chromatographic column.

Description

technical field [0001] The invention relates to the technical field of thermal cracking gas chromatography, in particular to a thermal cracker, a thermal cracking gas chromatograph using the thermal cracker and a thermal cracking analysis method thereof. Background technique [0002] Pyrolysis gas chromatography technology is developed on the basis of pyrolysis and gas chromatography. The application field of pyrolysis chromatography technology extends to material analysis, petrochemical plasticization, criminal / fire scene identification, optoelectronics / semiconductor, product quality control / quality assurance, food industry, etc., and is currently widely used in polymers, additives, coatings Ink analysis, cloth, cosmetics, lubricating oil, paper and related quality assurance and quality control surface pollutant detection, it has become an important means of polymer material analysis. [0003] Pyrolysis technology is a kind of sample pretreatment technology, which can deco...

Claims

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Application Information

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IPC IPC(8): G01N30/04G01N30/06G01N30/16G01N30/02
Inventor 王勇军
Owner 上海市计算技术研究所
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