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A combined processing method for heavy oil with concurrent methane production

A technology for combined processing and methane production, which is applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve problems such as high reaction temperature, regeneration and recovery of gasification catalysts, and complicated preparation of gasification feedstock, so as to avoid Effects of tail combustion, easy recovery of sulfur, and reduction of carbon emissions

Active Publication Date: 2016-01-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to overcome the high reaction temperature of petroleum coke produced in the existing processing process of inferior heavy oil in the process of producing high value-added products such as hydrogen, and the regeneration and recovery of gasification catalyst in the process of producing methane from petroleum coke gasification, and the preparation of gasification feedstock Complicated issues

Method used

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  • A combined processing method for heavy oil with concurrent methane production
  • A combined processing method for heavy oil with concurrent methane production

Examples

Experimental program
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Effect test

Embodiment 1

[0050] 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.

[0051] The raw agent enters the gasification unit after being stripped. The pressure of the gasification unit is 1.2Mpa. The raw agent enters the gasifier from the upper part of the reduction zone, and the gasification agent enters the oxidation zone of the gasifier from the bottom of the gasifier. In the oxidation zone, the temperature is 680°C, oxygen is 12.3% (mole), water is 87.7% (mole), the...

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 gasification unit after stripping, the pressure of the gasification unit is 5.0Mpa, the raw agent enters the gasifier from the upper part of the reduction zone, and the gasification agent enters the oxidation zone of the gasifier from the bottom of the gasifier. In the oxidation zone, the temperature is 635°C, oxygen is 18.0% (mole), water is 82.0% (mole), the g...

Embodiment 3

[0056] 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.

[0057] The raw agent enters the gasification unit after stripping. The pressure of the gasification unit is 8.1Mpa. The raw agent enters the gasifier from the upper part of the reduction zone, and the gasification agent enters the oxidation zone of the gasifier from the bottom of the gasifier. In the oxidation zone, the temperature is 700°C, oxygen is 10.0% (mole), water is 90.0% (mole), the gas linear velocity is 1.8m / s, and the gas residence time is 0.8 seconds. combustion. In the reduction zone, the ...

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Abstract

The invention discloses a heavy oil combined processing method capable of preparing methane. The heavy oil combined processing 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 device, wherein the gasification device is divided into an oxidation zone and a reduction zone, the coked catalyst is delivered into the gasification device through the upper part of the reduction zone, and a gasification agent is delivered into the oxidation zone through the bottom of the gasification device; in the gasification device, coke on the coked catalyst is 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 separated so as to obtain CH4 which can be used as natural gas; and a regenerative contact agent generated in the gasification device is delivered back to a contact cracking reactor. The heavy oil combined processing 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, and simultaneously produces methane. 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 env...

Claims

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Application Information

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Patent Type & Authority Patents(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陈振宇
Owner CHINA PETROLEUM & CHEM CORP
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