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A catalyst regeneration method for reducing carbon dioxide emissions

A carbon dioxide and catalyst technology, which is applied in the regeneration field 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 investment, and reducing the greenhouse effect

Active Publication Date: 2015-09-23
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 for reducing carbon dioxide emissions
  • A catalyst regeneration method for reducing carbon dioxide emissions
  • A catalyst regeneration method for reducing carbon dioxide emissions

Examples

Experimental program
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Embodiment

[0034] 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. Wherein the internal diameter of the charred tank is 20 cm, and the internal diameter of the dense phase bed is 50 cm. The catalyst is regenerated according to the regeneration method proposed by the present invention, and pure oxygen gas is fed into the coke pot and the dense-phase bed respectively, and at the same time, the flue gas from the cyclone separation system of the regenerator is returned to the bottom of the dense-phase bed. The temperature of the scorching pot is 650°C, and the temperature of the dense bed of the regenerator is 640°C. The residence time of the catalyst in the burnt pot was 60 seconds, and the average residence time in the dense bed was 2 minutes. The superficial linear velocity of gas in the charred tank is 1.4m / s, and...

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Abstract

The invention discloses a catalyst regeneration method used for reducing carbon dioxide release. The catalyst regeneration method comprises following steps: a carbon-containing catalyst is subjected to partial regeneration in a charring tank using pure oxygen, and then is delivered into a dense phase bed layer of a regenerator via a dilute phase tube so as to remove residual coke via combustion, wherein the dense phase bed layer is provided with a heat supplying device so as to control temperature of the dense phase bed layer; smoke is subjected to cyclone separation, is successively delivered into a smoke energy recovery system, and a carbon dioxide separating system for carbon dioxide separation, and is collected; and an obtained regenerated catalyst is directly delivered back into a reactor for recycling. The catalyst regeneration method is capable of realizing complete regeneration of the catalyst, reducing carbon release greatly, and even realizing zero carbon release. Catalyst activity distribution is more uniform, so that catalytic cracking product coke yield and dry gas yield are reduced.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/14
CPCY02P30/40
Inventor 许友好王新李首先龚剑洪
Owner CHINA PETROLEUM & CHEM CORP
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