Inferior heavy oil contact cracking-gasification combined treatment method

A technology of contact cracking and low-quality heavy oil, applied in chemical instruments and methods, sustainable manufacturing/processing, granular/powdered fuel gasification, etc., to increase concentration, reduce gasification reaction temperature, and avoid high-temperature hydrothermal deactivation Effect

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a combination process of contact cracking-gasification of inferior heavy oil with low gasification temperature and good contact agent stability on the basis of relatively mature heavy oil processing and coke gasification technologies in the prior art method

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  • Inferior heavy oil contact cracking-gasification combined treatment method
  • Inferior heavy oil contact cracking-gasification combined treatment method
  • Inferior heavy oil contact cracking-gasification combined treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The cracking catalyst containing Y molecular sieve (the brand name is MMC-2, produced by Qilu Catalyst Branch of Sinopec Corporation) and CaO with nanometer size are carried out after mixing, beating, spray drying and roasting with a weight ratio of 1:1 by using spray drying technology, Defined as contact agent-1.

[0052] In a fixed fluidized bed reactor, the contact agent-1 was contacted and reacted with the vacuum residue (see Table 1 for its properties), the reaction temperature was 500°C, the agent-oil ratio was 18.0, and the weight hourly space velocity was 4.0h -1 . The reaction temperature of the gasification reactor is 600°C, and the volume ratio of oxygen and water vapor is 45:55. The distribution of cracking and gasification reaction products is shown in Table 2. After partial gasification, the carbon content of the contact agent is 0.42wt%, and it enters the regenerator, and is regenerated by feeding oxygen at a regeneration temperature of 850°C.

Embodiment 2

[0057] After the waste catalytic cracking catalyst containing Y molecular sieve (trade name MLC-500, produced by Qilu Catalyst Branch of Sinopec Corporation) and MgO were mechanically mixed at a weight ratio of 5:1, the mixture was defined as contact agent-2.

[0058] In a fixed fluidized bed reactor, the contact agent-2 is contacted and reacted with the vacuum residue, the reaction temperature is 480°C, the agent-oil ratio is 10.0, and the weight hourly space velocity is 10.0h -1 , the reaction temperature of the gasification reactor is 700°C, and the volume ratio of oxygen and water vapor is 30:70. The distribution of cracking and gasification reaction products is shown in Table 2. After partial gasification, the carbon content of the contact agent is 0.50wt%, and it enters the regenerator, and is regenerated by feeding oxygen at a regeneration temperature of 900°C.

Embodiment 3

[0063] Cracking Catalyst MLC-500 and Ca(OH) Containing Y Molecular Sieve 2 After mechanical mixing at a weight ratio of 1:5, the mixture was defined as contact agent-3.

[0064] In a fixed fluidized bed reactor, the contact agent-3 is contacted and reacted with the vacuum residue, the reaction temperature is 560°C, the agent-oil ratio is 5.0, and the weight hourly space velocity is 20.0h -1 , the reaction temperature of the gasification reactor is 650°C, and the volume ratio of oxygen and water vapor is 40:60. The distribution of cracking and gasification reaction products is shown in Table 2. After partial gasification, the contact agent has a carbon content of 0.75wt%, enters the regenerator, and is regenerated by feeding oxygen at a regeneration temperature of 950°C.

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Abstract

The invention discloses an inferior heavy oil contact cracking-gasification combined treatment method. The inferior heavy oil contact cracking-gasification combined treatment method comprises the following steps that 1, inferior heavy oil is fed into a contact cracking reactor, undergoes a contact cracking reaction with a contact agent to produce reaction oil gas and a carbon-containing contact agent; and after gas-solid separation, the reaction oil gas is fed into a follow-up separation system and the carbon-containing contact agent is fed into a gasifier; 2, in the gasifier, carbon of the carbon-containing contact agent obtained by the step 1 and a gasification agent undergo a binding reaction at a low gasification temperature to produce synthesis gas rich in CO and H2; simultaneously a CO2 capture material of the carbon-containing contact agent absorbs CO2 produced by the binding reaction; and the reacted carbon-containing contact agent enters into a regenerator; and 3, oxygen-containing gas is fed into the regenerator; residual carbon of the reacted carbon-containing contact agent and oxygen undergo a reaction at a high reaction temperature and burn completely; the CO2 capture material binding with CO2 releases CO2 so that the reacted carbon-containing contact agent recovers activity; and the regenerated carbon-containing contact agent returns back to the contact cracking reactor. Through the inferior heavy oil contact cracking-gasification combined treatment method, a light oil yield of a cracking reaction is improved; a gasification reaction temperature is reduced; and contact agent hydro-thermal inactivation and structure damage are avoided.

Description

technical field [0001] The invention relates to a processing method of inferior heavy oil, more specifically, relates to a method combining cracking of inferior heavy oil and hydrogen production. Background technique [0002] In recent years, petroleum resources have become increasingly heavy, and the content of residual carbon and metals in crude oil has increased. The catalytic cracking process requires the metal content (Ni+V) in the heavy hydrocarbon oil feedstock to be less than 25 μg g -1 , so the problem of inferior heavy oil processing has become increasingly prominent. In view of the increasingly heavy oil resources and the increasing demand for environmentally friendly fuel oil products, major oil companies and scientific research institutions at home and abroad focus on the efficient use of heavy oil, such as how to improve the yield of liquid products, how to use inferior petroleum coke, etc. A lot of research work has been done, and a series of new heavy oil p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C01B3/16C10J3/46
CPCY02P20/52Y02P30/00
Inventor 张书红李延军王子军汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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