A Method for Analyzing Hydrogen Supply Ability of Narrow Fraction of Petroleum Cracking Products

A technology for oil cracking and hydrogen supply capacity, applied in the fields of analysis materials, material separation, instruments, etc., it can solve the problems of cumbersome calculation process and not very intuitive, and achieve the effect of using less sample.

Active Publication Date: 2022-02-01
PETROCHINA CO LTD
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Problems solved by technology

The calculation process is also relatively very cumbersome and not very intuitive

Method used

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  • A Method for Analyzing Hydrogen Supply Ability of Narrow Fraction of Petroleum Cracking Products
  • A Method for Analyzing Hydrogen Supply Ability of Narrow Fraction of Petroleum Cracking Products
  • A Method for Analyzing Hydrogen Supply Ability of Narrow Fraction of Petroleum Cracking Products

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Effect test

Embodiment 1

[0055] Distill and cut the cracked liquid product of Canadian oil sand bitumen residue (VTB) to obtain gasoline fraction (IBP-200°C, yield 13.6wt%), diesel fraction (200°C-350°C, 22.9wt%), light gas oil fraction (350°C-420°C, yield 9.10wt%) and heavy wax oil fraction (420°C-500°C, 12.1wt%) were analyzed as test samples to evaluate the hydrogen supply capacity of different fractions. Gasoline was directly analyzed by PONA column GC. The diesel fraction was directly analyzed by GC / FI-TOF-MS. Light wax oil and heavy wax oil adopt alumina as stationary phase respectively, take n-heptane and toluene as flushing solvent, are separated into light wax oil-saturated fraction (yield 36.4wt%) and light wax oil-aromatic fraction (yield 36.4wt%) Yield 63.6wt wt%), heavy wax oil-saturated fraction (yield 20.3wt%) and heavy wax oil aromatic fraction (yield 64.2wt%). After separation, the product was analyzed by GC / FI-TOF-MS. After data processing, the content of the compound in each fract...

Embodiment 2

[0057] The deoiled bitumen (DOA) cracking liquid product of Canadian oil sands bitumen residue (VTB) is distilled and cut to obtain gasoline fraction (IBP-200°C, yield 10.3wt%), diesel fraction (200°C-350°C, 14.5wt%) %), light wax oil fraction (350°C-420°C, yield 7.0wt%) and heavy wax oil fraction (420°C-500°C, 9.5wt%) were analyzed as test samples to evaluate the hydrogen supply capacity of different fractions . Gasoline was directly analyzed by PONA column GC. The diesel fraction was directly analyzed by GC / FI-TOF-MS. Light wax oil and heavy wax oil adopt alumina as stationary phase respectively, take n-heptane and toluene as flushing solvent, be separated into light wax oil-saturated fraction (yield 29.2wt%) and light wax oil-aromatic fraction (yield 29.2wt%) yield 63.9wt%), heavy wax oil-saturated fraction (yield 17.6wt%) and heavy wax oil aromatic fraction (yield 64.3wt%). After separation, the product was analyzed by GC / FI-TOF-MS. After data processing, the content o...

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Abstract

A method for analyzing the hydrogen supply capacity of a narrow fraction of petroleum cracking products, comprising the following steps: S1: analyzing the narrow fractions of petroleum cracking products by chromatography and chromatography-mass spectrometry; S2: performing data post-processing on the analysis results in S1 Wherein, the post-processing of the data comprises the following steps: 1) the chromatographic-mass spectrometry analysis results in S1 are summarized according to the hydrocarbon carbon number and the hydrogen deficiency index Z in the oil product; 2) the hydrocarbons with different carbon numbers corresponding to the deficiency The hydrogen index Z is classified according to the type of hydrocarbon; 3) calculate the proportion of compounds with tetralin structure and decahydronaphthalene structure; 4) compare the proportion of compounds with hydrogen supply capacity in different fractions of the same source, Determine suitable fractions as hydrogen donors. The method is convenient, intuitive, and uses a small amount of samples. Simple calculations on the analytical data can determine the hydrogen supply capacity of the fractions, which is of great significance for the selection of hydrogen supply fractions in the hydrogen supply thermal cracking process.

Description

technical field [0001] The invention relates to a method for quickly analyzing the strength of hydrogen supply capacity of narrow fractions in petroleum cracking products. Background technique [0002] At present, it is generally believed that the thermal reaction of hydrocarbons in heavy oil is a free radical chain reaction, and the hydrocarbon radical is generated by the C-C bond homolysis in the hydrocarbon molecule, which has unpaired electrons. The thermal reaction proceeds in two directions at the same time, one is cracking and the other is condensation. The former is the cracking of larger molecules into smaller molecules, while the latter is the dehydrogenation and polycondensation of smaller molecules into larger molecules. In the thermal conversion products of petroleum, in addition to producing distillate oil and gas which are lighter than the raw materials, products heavier than the raw materials are bound to be produced, until coke. Taking certain measures in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 王丽涛史权刘银东赵锁奇张艳梅韩爽卢竟蔓许倩于志敏崔晨曦张东明张浩然鄂宇恒
Owner PETROCHINA CO LTD
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