A kind of regeneration method of desulfurization adsorbent

A technology of adsorbent and metal, which is applied in the field of regeneration of desulfurization adsorbent, can solve the problems of inability to restore the adsorbent, increase the cost of regeneration, and inapplicability, and achieve the elimination of by-products, avoiding the reduction of activity, and avoiding the loss of sulfur capacity Effect

Active Publication Date: 2021-12-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can obtain relatively pure and highly dispersed ZnO, but because this process requires additional use of a large amount of water and sulfuric acid and ammonium carbonate / ammonium bicarbonate raw materials, it will inevitably increase the regeneration cost, and will also produce ammonium sulfate by-products and A large amount of waste water, and for containing SiO 2 and Al 2 o 3 For the shaped desulfurization adsorbent used as a binder or carrier, it is difficult to obtain pure ZnO products, and the adsorbent cannot be restored, so this method is not suitable for the regeneration process of the shaped desulfurization adsorbent in the actual industry

Method used

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  • A kind of regeneration method of desulfurization adsorbent
  • A kind of regeneration method of desulfurization adsorbent
  • A kind of regeneration method of desulfurization adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0094] Regeneration of deactivated desulfurization adsorbent:

[0095] Take 5g of inactivated desulfurization adsorbent Cat-1 and put it in a tubular reactor. 2 , the gas pressure is 0.1MPa, the air velocity is 3.6L h -1 g -1 Under the conditions of purging for 12h, then at a temperature of 500 ° C, the gas is 3% O 2 / N 2 Mixed gas, gas pressure 0.1MPa, airflow space velocity 3.6L h -1 g -1 Roasting under the conditions of 12h, get regenerated desulfurization adsorbent, denoted as Cat-2.

Embodiment 2

[0097] Take 5g of inactivated desulfurization adsorbent Cat-1 and put it in a tubular reactor, and regenerate the deactivated adsorbent with the same regeneration method as in Example 1, except that the roasting time is changed from 12h to 24h, to obtain the regenerated desulfurization adsorbent agent, denoted as Cat-3.

Embodiment 3

[0099] Take 5g of inactivated desulfurization adsorbent Cat-1 and put it in a tubular reactor, and use the same regeneration method as in Example 1 except that the roasting time is changed from 12h to 36h to regenerate the deactivated adsorbent to obtain the regenerated desulfurization adsorbent agent, denoted as Cat-4.

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Abstract

The invention discloses a regeneration method for a desulfurization adsorbent, which specifically comprises the following steps: (1) purging under inert gas conditions to remove organic matter and other reducing substances attached to the surface of the deactivated desulfurization adsorbent; High-temperature roasting under oxygen gas conditions to remove carbon and sulfur components in the adsorbent; (3) high-temperature roasting under inert gas conditions to make the by-product zinc oxysulfate generated in step (2) react with unreacted zinc sulfide to form Regenerate the target product zinc oxide, further improve the regeneration effect of the deactivated adsorbent, and complete the regeneration of the adsorbent. The adsorbent regeneration method of the present invention can not only effectively restore the activity and sulfur capacity of the desulfurization adsorbent, but also eliminate the by-products generated during the regeneration reaction, and is especially suitable for the adsorbent regeneration process in the adsorption desulfurization process.

Description

technical field [0001] The invention relates to a regeneration method of a desulfurization adsorbent. Background technique [0002] The sulfur compounds in the fuel will generate sulfur oxides SO after combustion x On the one hand, it will form acid rain to pollute the environment, on the other hand, it will also poison the three-way catalyst in the automobile exhaust gas conversion system, affecting the NO in the exhaust gas. x , CO and hydrocarbons are effectively converted, causing air pollution. As people pay more and more attention to environmental protection, relevant environmental protection laws and regulations are becoming stricter, and the sulfur content index of fuel oil is limited. In recent years, my country's automotive fuel standards have increasingly strict requirements for sulfur content restrictions. Beijing and other regions took the lead in implementing the National V standard in 2012, requiring gasoline and diesel sulfur content to be lower than 10ppmw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/06
Inventor 李灿蒋宗轩张伟刘铁峰刘欣毅
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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