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A kind of regeneration method of adsorption desulfurization agent

A technology for adsorption desulfurization and regeneration of gas, applied in catalyst regeneration/reactivation, separation method, filter regeneration, etc., can solve problems such as long reaction time, achieve good regeneration effect, meet industrial operation requirements, and reduce the time of hydrothermal treatment process. Effect

Active Publication Date: 2019-12-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the co-precipitation method, although the invention uses two precipitations, the specific surface area of ​​the prepared LDH material is higher, but the reaction time of the invention is longer, and the reaction time given in the examples is more than 10 hours

Method used

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  • A kind of regeneration method of adsorption desulfurization agent

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Put the adsorption desulfurizer 1 into a 200mL fixed-bed adiabatic reactor to desulfurize the catalytic cracking gasoline raw material. The reaction process conditions are: reactor temperature 360°C, reaction pressure 0.5MPa, volume space velocity 7.2h -1 , The volume ratio of hydrogen to oil is 0.3. When the adsorption sulfur capacity reaches saturation during the desulfurization process, the adsorption desulfurization agent 1 is regenerated. The process conditions are as follows: in a nitrogen atmosphere, at a heating rate of 25 °C / h, from room temperature to 260 °C, and stay for 8 hours; Regenerate the catalyst afterwards, the regeneration gas used is an oxygen-containing gas (gas composition includes oxygen and nitrogen, wherein the oxygen volume content accounts for 16% of the total gas), and the bed temperature is raised to 310 ° C at a heating rate of 15 ° C / h, starting slowly Cut in 10% of the regeneration gas and establish circulation; then raise the bed temp...

Embodiment 2

[0053] Put the adsorption desulfurizer 2 into a 200mL fixed-bed isothermal reactor to desulfurize the catalytic cracking gasoline raw material. The reaction process conditions are: reactor temperature 360°C, reaction pressure 0.5MPa, volume space velocity 7.2h -1 , The volume ratio of hydrogen to oil is 0.3. When the adsorption sulfur capacity reaches saturation during the desulfurization process, the adsorption desulfurization agent 2 is regenerated. The process conditions are: in a nitrogen atmosphere, at a heating rate of 15 °C / h, from room temperature to 260 °C, and stay for 4 hours; Afterwards, the catalyst is regenerated, the regeneration gas used is air, the bed temperature is raised to 310°C at a heating rate of 5°C / h, and 10% regeneration gas is started to be slowly cut in and circulation is established; then the bed temperature is raised to 490°C, and then Cut in the regeneration gas step by step according to the ratio of 30%, 50%, 70%, until 100%. The volume ratio ...

Embodiment 3

[0055] Put the adsorption desulfurizer 3 into a 500mL fixed-bed isothermal reactor to desulfurize the catalytic cracking gasoline raw material. The reaction process conditions are: reactor temperature 360°C, reaction pressure 0.5MPa, volume space velocity 7.2h -1 , The volume ratio of hydrogen to oil is 0.3. When the adsorption sulfur capacity reaches saturation during the desulfurization process, the adsorption desulfurization agent 3 is regenerated. The process conditions are: in a nitrogen atmosphere, at a heating rate of 20°C / h, from room temperature to 260°C, and stay for 5h; Afterwards, the catalyst is regenerated, and the regeneration gas used is air, and the bed temperature is raised to 310° C. at a heating rate of 20° C. / h, and 10% regeneration gas is slowly cut in and a cycle is established; then the bed temperature is raised to 490° C., and then Cut in the regeneration gas step by step according to the ratio of 30%, 50%, 70%, until 100%. The volume ratio of the reg...

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Abstract

The invention relates to a regenerating method for an adsorption desulfurizer. A fixed bed reactor is adopted; and the adsorption desulfurizer comprises gahnite-containing zinc oxide, nickel oxide and molybdenum oxide, and the specific surface area of the adsorption desulfurizer is 150-220 m<2> / g. Regenerating technology conditions of the adsorption desulfurizer are as follows: the temperature rises to 260 DEG C from room temperature in a nitrogen atmosphere according to a heating rate of 15-30 DEG C / h, and stays at the 260 DEG C for 2-10 h, the temperature of a bed rises to 310 DEG C according to a heating rate of 5-20 DEG C / h, 10% air or an oxygen-containing gas is slowly introduced, and a cycle is established to regenerate a catalyst; and the regenerating pressure is 0.2-1.0 MPa. The regenerating method afresh recovers the desulfurization activity of the sulfur adsorption capacity-saturated inactivated catalyst in the desulfurization process through treatment in order to meet industrial operating requirements.

Description

technical field [0001] The invention relates to a regeneration method of an adsorption desulfurization agent, which is suitable for the regeneration treatment of a zinc oxide adsorption desulfurization agent containing zinc-aluminum spinel. Background technique [0002] Compared with foreign gasoline, the sources of gasoline in my country are complex and their properties are quite different, mainly in the content of sulfur and olefins, among which the content of sulfur is significantly higher than that of foreign countries. In order to improve the current situation of environmental pollution, it is particularly important to carry out research on deep desulfurization of gasoline in China and obtain an effective desulfurization method. Since about 70% of domestic gasoline is FCC gasoline, the key to domestic gasoline desulfurization lies in the desulfurization of FCC gasoline. At present, the desulfurization of catalytic cracked gasoline in my country is mainly through the hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/08B01J20/30B01J23/94B01J38/02B01J38/20C10G25/00C10G45/04
CPCB01J20/06B01J20/08B01J20/3458B01J23/94B01J38/02B01J38/20C10G25/003C10G45/04
Inventor 姚文君张忠东李景锋初伟李自夏王兴梅王廷海向永生吴杰刘敏王书峰
Owner PETROCHINA CO LTD
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