Catalyst regeneration method with characteristic of discharge reduction
A catalyst and regenerator technology, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult separation of flue gas, greenhouse effect, high cost, and achieve uniform activity distribution, Good economic and social benefits, device modification and the effect of less investment
Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
Due to the difficulty and high cost of flue gas separation, under normal conditions, the flue gas enters the energy recovery system and is directly discharged, resulting in a greenhouse effect
Method used
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Embodiment
[0026] The embodiment is carried out on a medium-sized catalytic cracking unit, as shown in the accompanying drawing. According to the regeneration method proposed by the present invention, the catalyst is regenerated. The properties of the catalyst are listed in Table 2. The oxygen-enriched gas, water vapor and carbon dioxide gas are fed into the regenerator. , the average residence time of the catalyst is 2 minutes, the weight ratio of water vapor to oxygen-enriched gas is 0.05, and the apparent linear velocity of the gas is 1.0m / s. The regenerated catalyst enters the reactor and contacts with the feedstock oil listed in Table 1. The catalytic cracking reaction was carried out, and the regeneration conditions, reaction conditions, carbon content of the regenerated catalyst and flue gas composition are listed in Table 3.
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The invention relates to a catalyst regeneration method with characteristic of discharge reduction, which is characterized in that a catalyst to be generated is contacted with oxygen-rich gas, water vapor and carbon dioxide gas in a dense-phase fluidized bed reactivator, a coke combustion reaction is generated under the condition that the temperature is 550-750 DEG C and the average stay time of the catalyst is 0.5-10.0 minutes, the regenerated catalyst is introduced in a reactor, the flue gas is divided into two parts through a cyclone separator, one part is circulated to an air inlet system of the reactivator and is mixed with oxygen-rich gas, and the other part is introduced in a flue gas energy recovery system for recovering carbon dioxide without discharge. The method can reach zero discharge of carbon, oxygen with 40% volume fraction can fully combust the coke to totally generate CO2, N2 is not contained in flue gas, CO2 is recovered for convenient recycle, and the catalyst regeneration method has good economic benefit and social benefit, catalyst regeneration environment is mild, and the catalyst activity distribution is more uniform.
Description
technical field [0001] The invention relates to a method for regenerating coke of a carbon-containing catalyst in the catalytic cracking process. Background technique [0002] In October 2009, the country announced the action goal of controlling greenhouse gas emissions: that is, by 2020, the country's unit GDP CO 2 Emissions are reduced by 40% to 45% compared to 2005, and it is clearly proposed that carbon dioxide emissions per unit of GDP will be reduced by 17% during the "Twelfth Five-Year Plan" period. Therefore, it is particularly important to effectively reduce carbon emissions in the process of petroleum refining and chemical production. Capture, storage and management of CO 2 It will become an important task for the refinery in the future. Carbon emissions in heavy oil processing are mainly carbon emissions from catalytic cracking coking, hydrogen production, and energy consumption in the process. The catalytic cracking unit is the core production unit of the refi...
Claims
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Login to View More IPC IPC(8): B01J38/36B01J38/40
Inventor 王新许友好龚剑洪崔守业
Owner CHINA PETROLEUM & CHEM CORP