A catalyst regeneration method that reduces carbon dioxide emissions and improves selectivity

A carbon dioxide and catalyst technology, which is applied in the regeneration of carbon-containing catalysts, can solve problems such as high coke and dry gas yields, and achieve the effects of reducing coke and dry gas yields, reducing floor space, and reducing carbon emissions

Active Publication Date: 2016-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • A catalyst regeneration method that reduces carbon dioxide emissions and improves selectivity
  • A catalyst regeneration method that reduces carbon dioxide emissions and improves selectivity
  • A catalyst regeneration method that reduces carbon dioxide emissions and improves selectivity

Examples

Experimental program
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Embodiment

[0036] The embodiment is carried out on a catalytic cracking demonstration unit, as shown in the accompanying drawing. The demonstration plant does not have a flue gas energy recovery system and a carbon dioxide separation system. The inner diameter of the burnt tube is 5 cm, and the inner diameter of the dense-phase bed is 50 cm. The catalyst is regenerated according to the regeneration method proposed by the present invention. Pure oxygen gas is fed into the burnt tube and the dense-phase bed respectively, and at the same time, part of the flue gas from the cyclone separation system of the regenerator is returned to the bottom of the dense-phase bed. The temperature in the middle of the burnt tube is 640°C, and the temperature of the dense-phase bed in the regenerator is 650°C. The residence time of the catalyst in the burnt tube was 12 seconds, and the average residence time in the dense bed was 2 minutes. The superficial linear velocity of gas in the burnt tube is 1.5m / s...

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Abstract

The invention relates to a catalyst regeneration method able to reduce carbon dioxide emission and improve selectivity. The method includes: letting a char-containing catalyst move upward in a charring pipe under carrying by a pure oxygen gas to undergo coke combustion reaction, keeping the charring ratio in the charring pipe at 30-50%, making the catalyst coming from the charring pipe burn up the residual coke through pure oxygen, subjecting the flue gas to cyclone separation, then letting the separated flue gas enter a flue gas energy recovery system and a carbon dioxide separation system, separating carbon dioxide and then performing capturing, subjecting the regenerated catalyst to cooling and activation, then leading the regenerated catalyst into a reactor to undergo recycling. The method not only can make the catalyst regenerate completely and make the catalyst activity distribution more uniform so as to reduce the catalytic cracking by-product coke and dry gas yields, but also can greatly reduce carbon emission, or even reach zero carbon emission.

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 reducing carbon dioxide emissions and improving catalyst selectivity in the heavy oil catalytic cracking process. 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,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/20B01J29/90
Inventor 龚剑洪王新崔守业
Owner CHINA PETROLEUM & CHEM CORP
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