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Method for regenerating coking catalyst

A catalyst and coking technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high energy consumption and operating costs, improve recycling efficiency, prevent tail burning, regeneration the effect of safe operation of the

Pending Publication Date: 2021-11-19
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there are many mature carbon dioxide recovery methods, such as physical absorption method, chemical absorption method, membrane separation method, etc. Among them, chemical adsorption method is the most widely used method, but there are also problems of high energy consumption and operating costs

Method used

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  • Method for regenerating coking catalyst
  • Method for regenerating coking catalyst
  • Method for regenerating coking catalyst

Examples

Experimental program
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Embodiment 1

[0044] like figure 1 As shown, in the start of the catalytic cracking device, the components of the air are separated by the space separation device, separating high purity oxygen and other gases; positively passing high purity oxygen into the combustion furnace, contacting the fuel oil High purity carbon dioxide; after mixing the resulting high purity carbon dioxide with high purity oxygen at 4: 1, after mixing in the mixer, instead of the main wind, enter the catalytic cracking regenerator to promote the burn to the standby agent The focus reaction produces a regenerative flue gas of high carbon dioxide content; the recycled flue gas discharged from the regeneration system is under the control of the main wind control system, and the mixer is circulated back into the mixer, and gradually replaces the carbon dioxide generated by the combustion furnace. Initial operating conditions of the regenerator are shown in Table 1, the regeneration flue gas composition is shown in Table 2. ...

Embodiment 2

[0046] like figure 2 As shown, in the stable operating stage of the catalytic cracking device, the components of the air are separated by the space separation device, separating high purity oxygen and other gases; at the control system of the main control system, high purity oxygen and part Regenerator smoke (mainly CO 2 The molar ratio of 1: 5 is mixed in the mixer, and the catalytic cracking regenerator is transferred to the firing reaction, and the carbon dioxide content is high. Initial operating conditions of the regenerator are shown in Table 1, the regeneration flue gas composition is shown in Table 2.

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Abstract

The invention discloses a method for regenerating a coking catalyst. The method is characterized in that mixed gas of oxygen and carbon dioxide is used for replacing traditional air (mixed gas of oxygen and nitrogen) to serve as main air of a regenerator, a regenerant is promoted to perform scorching regeneration, the oxygen and coke on a spent catalyst are subjected to a combustion reaction, the content of carbon dioxide in the generated flue gas can reach 95% or above, carbon dioxide with high purity can be obtained without a complex trapping process, and the recycling efficiency of carbon dioxide is greatly improved. According to the invention, the heat capacity of carbon dioxide is about 60% higher than that of nitrogen, and carbon dioxide replaces nitrogen to circulate in the regenerator, so that more heat can be taken away, and the heat load of the regenerator and the heat collector is reduced; the carbon monoxide content in the regenerated flue gas can be effectively controlled, so that tail combustion caused by high carbon monoxide concentration is prevented, and the operation of the regenerator is safer; and the main air does not contain nitrogen, so that the nitrogen is prevented from reacting with oxygen at high temperature to generate NOx pollution gas.

Description

Technical field [0001] The present invention relates to the field of petrochemical technology, and in particular, to a regeneration method of a coking catalyst. Background technique [0002] Many human production and life behaviors continue to consume a large number of carbonized hydrofossate energy, more than 60% of the greenhouse gases produced by carbonite energy consumption is carbon dioxide. According to the assessment report released by the United Nations Climate Change Special Committee (IPCC), the average temperature in the global surface has increased by 0.74 ° C for nearly 100 years, and the next 100 years may also rise 1.1-6.4 ° C. The scientific community has generally believed that a large number of greenhouse gas emissions such as carbon dioxide fuel caused by fossil fuels have been the main reason for global warming. Since the greenhouse effect is becoming more serious, there have been climate disasters caused by climate warming around the world: the melting of gla...

Claims

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Application Information

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IPC IPC(8): B01J38/12B01J38/04B01J38/02
CPCB01J38/12B01J38/04B01J38/02
Inventor 孟凡东孙世源闫鸿飞武立宪张亚西张瑞风杨鑫
Owner CHINA PETROLEUM & CHEM CORP
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