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Heavy oil upgrading method capable of preparing methane

A processing method, methane production technology, applied in the direction of chemical instruments and methods, only multi-stage series refining and cracking process treatment, hydrocarbons, etc., can solve problems such as tail combustion safety issues, maintain self-heating balance, reduce carbon The effect of emissions

Active Publication Date: 2014-02-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the safety problem of tail combustion in the existing process of contact cracking-gasification synthesis gas, as well as the problem of sulfur recovery and sulfur emission when processing inferior heavy oil

Method used

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  • Heavy oil upgrading method capable of preparing methane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The catalytic cracking catalyst with the trade name of CRC-1 was mechanically mixed with the gasification catalyst GC-3 at a mass ratio of 1:1, with a residual carbon value of 15.10% by weight, a metal content of 50 μg / g, and a sulfur content of 1.12% (by mass) The contact cracking reaction of heavy oil occurs in the contact cracking unit, and the process conditions of the contact cracking reaction are: cracking temperature 460°C, space velocity 10h -1 , the agent-oil ratio is 10, the water-oil ratio is 0.1, and the coke content of the resulting spent agent is 1.8% by weight.

[0050] The raw agent enters the fluidized bed gasifier after being stripped. The gas linear velocity of the gasifier is 0.25m / s, the gasification temperature is 620°C, and the pressure is 1.2Mpa. Water vapor is fed in as the gasification agent, and gasification and methanation reactions occur. After gas-solid separation in the gasifier, a semi-regenerated contact agent and gasification gas conta...

Embodiment 2

[0053] The catalytic cracking catalyst whose trade name is CRC-1 is mechanically mixed with the gasification catalyst GC-1, the mass ratio of the two is 3:7, and then the carbon residue value is 18.10% by weight, the metal is 200 μg / g, and the sulfur content is 1.12% (mass) heavy oil undergoes a contact cracking reaction in the contact cracking unit, and the process conditions of the contact cracking reaction are: cracking temperature 500°C, space velocity 20h -1 , the agent-oil ratio is 7, the water-oil ratio is 0.2, and the coke content of the resulting spent agent is 2.5% by weight.

[0054] The raw agent enters the fluidized bed gasifier after being stripped. The linear velocity of the gas in the gasifier is 0.12m / s, the gasification temperature is 520°C, and the pressure is 5Mpa. Water vapor is introduced as a gasification agent, and gasification and methanation reactions occur. After the gas-solid separation in the gasifier, a semi-regenerated contact agent and gasifica...

Embodiment 3

[0057] The silicon-aluminum material MFC-1 and heavy oil with a residual carbon value of 35.0% by weight, a metal content of 425 μg / g, and a sulfur content of 3.12% (mass) undergo a contact cracking reaction in a contact cracking unit. The process conditions for the contact cracking reaction are: cracking temperature 520℃, space velocity 50h -1 , the agent-to-oil ratio is 20, the water-to-oil ratio is 0.5, and the coke content of the resulting spent agent is 2.8% by weight.

[0058] The raw agent enters the fluidized bed gasifier after being stripped. The linear velocity of the gas in the gasifier is 0.4m / s, the gasification temperature is 650°C, and the pressure is 9Mpa. Water vapor is introduced as a gasification agent, and gasification and methanation reactions occur. After gas-solid separation in the gasifier, a semi-regenerated agent and gasification gas with a carbon content of 0.92% by weight are obtained. After the gasification gas is dehydrated, CH 4 The molar conte...

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Abstract

The invention discloses a heavy oil upgrading method capable of preparing methane. The heavy oil upgrading method comprises following steps: light oil is obtained after contact cracking of low-quality heavy oil, and at the same time, an obtained coked catalyst is delivered into a gasification unit; in the gasification unit, coke on the coked catalyst and a gasification agent are subjected to gasification and methanation reaction so as to obtain a gasification gas containing CH4, CO, H2 and CO2, wherein sulfur in the gasification gas mainly comes from H2S; the gasification gas is delivered into desulphurizing equipment for desulphuration, and then the gasification gas is further separated, obtained CH4 is removed, and obtained CO and H2 are delivered back to the gasification unit; an obtained a semi-regenerative contact agent is delivered into a regeneration unit, and in the presence of oxygen, complete combustion of carbon residue on the semi-regenerative contact agent is realized so as to obtain a complete-regenerative contact agent and smoke, wherein sulfur in the smoke mainly comes from SOx; the smoke is delivered through a alkali washing device, or is processed using a sulfur transferring agent so as to achieve emission standards, and then is discharged, and the complete-regenerative contact agent is delivered back to a contact cracking reactor. The heavy oil upgrading method is capable of realizing utilization of petroleum resources with high efficient and little pollution.

Description

technical field [0001] The invention belongs to a method for processing inferior heavy oil. More specifically, it is a combined processing method that organically combines heavy oil contact cracking and gasification regeneration. Background technique [0002] In recent years, petroleum resources have become increasingly heavy, and the content of residual carbon, sulfur and metals has increased. The residual catalytic cracking feedstock requirement (Ni+V) <25μg·g -1 , generally 10 μg·g -1 There are also restrictions on the sulfur content. For example, the residual oil fluidized catalytic cracking (RFCC) process of Shiwei Company requires that the sulfur content in the feedstock oil be 0.2~2.4% (by mass), so the problem of processing inferior heavy oil or residual oil is becoming increasingly prominent. The shortage of oil resources, high international oil prices, poor quality of oil resources, heavy oil and increasingly stringent environmental protection requirements ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C10J3/46C07C9/04C07C1/00
Inventor 申海平张书红王子军龙军朱玉霞李延军李子锋朱丙田汪燮卿杨雪
Owner CHINA PETROLEUM & CHEM CORP
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