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A Catalytic Cracking Method for Reducing Carbon Dioxide Emissions

A technology of catalytic cracking and carbon dioxide, which is applied in the direction of catalytic cracking, cracking, only multi-stage series refining and cracking process treatment, etc., can solve the problems such as no regeneration method, shorten the residence time, improve regeneration efficiency, and consume energy Reduced effect

Active Publication Date: 2015-09-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, US4542114 and US5565089 both adopt conventional catalytic cracking regenerators, and there is no mention in the patent of using tubular, pure O 2 and without recycling CO 2 this way of regeneration

Method used

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  • A Catalytic Cracking Method for Reducing Carbon Dioxide Emissions
  • A Catalytic Cracking Method for Reducing Carbon Dioxide Emissions
  • A Catalytic Cracking Method for Reducing Carbon Dioxide Emissions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This test was carried out on a small fixed fluidized bed device with a catalyst loading of 100 g. The raw catalyst used in the test is an industrial raw catalyst obtained from the Petrochemical General Plant of Shengli Oilfield Branch. The catalyst brand is COKC-1, which is produced by Qilu Zhoucun Catalyst Factory.

[0046] Table 1 Physicochemical properties of COKC-1 catalyst

[0047]

[0048] The test procedure is as follows: Weigh 100g of the above-mentioned raw catalyst, put it into a fixed fluidized bed reactor, and feed pure O 2 Fluidization is maintained while increasing the temperature. When the temperature rises to 650°C, the N 2 switch to O 2 Carry out coking, online analysis of reactor outlet CO 2 concentration to determine the ignition temperature. Using air instead of pure oxygen, a similar test was carried out under the same conditions and temperature program. The test results are shown in Table 2.

[0049] Table 2 Air and pure oxygen comparison...

Embodiment 2

[0054] The test was carried out on a medium-sized riser catalytic cracking test unit with a treatment capacity of 2kg / h. The catalyst and raw oil used in the test were all obtained from the General Petrochemical Plant of Shengli Oilfield Company. The main properties of the balancer are shown in Table 1, and the properties of the raw oil are shown in Table 3. The test procedure is briefly described as follows:

[0055] After the raw oil is preheated to 200°C, it is injected into the reactor through the high-efficiency atomizing nozzle located at the bottom of the riser reactor, and contacts and reacts with the high-temperature catalyst pre-lifted by steam from the regenerator. The mixture of oil, gas and catalyst flows along the riser Uplink; the reaction oil gas is separated from the catalyst in the settler, and the oil gas enters the subsequent separation system through the oil transfer line, and is further separated into cracked gas, gasoline, diesel and other products, and ...

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Abstract

The invention discloses a catalytic cracking method for reducing carbon dioxide emission, in order to solve the problems of trapping and economic utilization of CO2 in the catalytic cracking process. The method comprises steps of: injecting a preheated hydrocarbon feedstock into a reactor riser; contacting and reacting the feedstock with a regenerated catalyst to generate an oil gas product and a spent catalyst; stripping the spent catalyst, sending the spent catalyst into a regeneration riser, contacting the spent catalyst with sectionally entered pure oxygen for a charring regeneration reaction to generate flue gas with high CO2 concentration and the regenerated catalyst; and sending the regenerated catalyst into a reactor for recycling. The method can realize a CO2 concentration higher than 95v% in dehydrated flue gas, thus realizing trapping and economic utilization.

Description

technical field [0001] The invention relates to the field of catalytic cracking of hydrocarbon oil, and relates to a catalytic cracking method for reducing carbon dioxide emission. Background technique [0002] The catalytic cracking unit is the most important CO 2 sources of atmospheric emissions. According to statistics, in 2005 my country's refinery CO 2 Direct emissions totaled 31.14 million tons, of which combustion emissions were 15.512 million tons and process emissions were 15.634 million tons. Catalytic cracking regeneration of charred CO 2 The emissions were 1223.57, accounting for 78.26% of process emissions and 39.29% of direct emissions. my country promises that by 2020, carbon dioxide emissions per unit of GDP will drop by 40% to 50% compared with 2005. Therefore, in recent years, people have been working on the development of new catalytic cracking technologies to reduce CO emissions as much as possible. 2 to reduce its impact on the environment. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/06C10G11/20C10G11/18
CPCY02P30/40
Inventor 李秋芝孟凡东王龙延闫鸿飞陈曼桥樊麦跃
Owner CHINA PETROLEUM & CHEM CORP