A catalyst regeneration method for reducing carbon dioxide emissions

Abstract

The invention discloses a catalyst regeneration method capable of reducing carbon dioxide discharge. The catalyst regeneration method is characterized in that a catalyst with coke is subjected to pure oxygen-used partial regeneration in a first regenerator; the partially regenerated catalyst goes through an external circulating pipe, then enters into a second regenerator below the first regenerator and then is subjected to pure oxygen-used residual coke burning; the catalyst discharged from the first regenerator is fed into an external cooler, then is cooled and then is returned to the second regenerator; after cyclone separation, flue gas orderly enters into a flue gas energy recovery system and a carbon dioxide separation system and after carbon dioxide separation, a capturing process is carried out; and the regenerated catalyst is directly returned into a reactor for recycle. The catalyst regeneration method realizes complete regeneration of a catalyst and uniform distribution of catalyst activity so that coke as a catalytic cracking by-product and a dry gas yield are reduced. The catalyst regeneration method greatly reduces carbon emission and even realizes zero emission of carbon.

Description

technical field [0001] The invention relates to a method for regenerating carbon-containing catalysts in hydrocarbon processing. More specifically, the present invention relates to a catalyst regeneration method for realizing carbon dioxide emission reduction in the catalytic cracking process of heavy oil. Background technique [0002] Today, the development of the global oil refining industry is facing many challenges such as oil price fluctuations, the trend of worsening crude oil quality, improved oil product quality specifications, stricter requirements for energy conservation and emission reduction, and the rapid development of biofuels. Reducing carbon dioxide emissions and mitigating climate change have become the key factors for the oil refining industry to transform the economy. The way of growth and the only way to maintain sustainable development. In October 2009, the country announced the action goal of controlling greenhouse gas emissions, that is, by 2020, the...

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Problems solved by technology

For example, the highest activity recovery of the regenerated catalyst can be achieved during regeneration, but when the regenerated catalyst participates in the reaction, it may cause high coke and dry gas yields due to its high activity, which is undesirable

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