Pretreatment method for adsorptive desulfurizing agent

An adsorption desulfurization and pretreatment technology, applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve problems such as long reaction time, achieve mild operating conditions, high penetration sulfur capacity, and reduce the effect of hydrothermal treatment.

Active Publication Date: 2017-12-26
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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  • Pretreatment method for adsorptive desulfurizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Put the adsorption desulfurizer 1 into a 200mL fixed-bed isothermal reactor. When the pressure is 0.6MPa, under the hydrogen atmosphere, the volume ratio of hydrogen to catalyst is 210:1 to establish a cycle. Raise the temperature to 260°C and stay for 3 hours, raise the temperature to 300°C and stay for 5 hours, raise the temperature to 350°C and stay for 3.5 hours, raise the temperature to 410°C and stay for 1 hour. The reaction process conditions are: reactor temperature 355°C, reaction pressure 0.7MPa, volumetric space velocity 5.5h -1 , the volume ratio of hydrogen to oil is 0.4; the desulfurization rate of the product is 88%, the octane number loss is 0.7 units, and the breakthrough sulfur capacity is 26%.

Embodiment 2

[0054] Put the adsorption desulfurizer 2 into a 500mL fixed-bed adiabatic reactor. When the pressure is 0.7MPa, under the atmosphere of hydrogen-containing gas, the volume ratio of hydrogen to catalyst is 450:1 to establish a cycle, and the temperature rise rate is 8°C / h. Raise the temperature from room temperature to 260°C and stay for 1.5h, raise the temperature to 300°C and stay for 2h, raise the temperature to 350°C and stay for 1h, raise the temperature to 410°C and stay for 4.5h. The reaction process conditions are: reactor temperature 355°C, reaction pressure 0.7MPa, volumetric space velocity 5.5h -1 , the volume ratio of hydrogen to oil is 0.4; the desulfurization rate of the product is 93%, the octane number loss is 0.6 units, and the breakthrough sulfur capacity is 33%.

Embodiment 3

[0056] Put the adsorption desulfurizer 3 into a 500mL fixed-bed isothermal reactor. When the pressure is 0.5MPa, under a hydrogen atmosphere, the volume ratio of hydrogen to catalyst is 160:1 to establish a cycle. The heating rate is 10°C / h. The temperature was raised to 260°C and stayed for 5 hours, the temperature was raised to 300°C and stayed for 2.5 hours, the temperature was raised to 350°C and stayed for 5 hours, the temperature was raised to 410°C and stayed for 3 hours. The reaction process conditions are: reactor temperature 355°C, reaction pressure 0.7MPa, volumetric space velocity 5.5h -1 , the volume ratio of hydrogen to oil is 0.4; the desulfurization rate of the product is 85%, the octane number loss is 0.6 units, and the breakthrough sulfur capacity is 34%.

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Abstract

The invention relates to a pretreatment method for an adsorptive desulfurizing agent. The method adopts a fixed bed reactor. The main components of the adsorptive desulfurizing agent are zinc oxide containing zinc-aluminum spinel, nickel oxide and molybdenum oxide. In terms of oxides, the adsorptive desulfurizing agent contains 40-85wt% of zinc oxide containing zinc-aluminum spinel, 10-35wt% of nickel oxide, and 0-25wt% of molybdenum oxide. And the specific surface area of the adsorptive desulfurizing agent is 150-220m<2>/g. The pretreatment technological conditions of the adsorptive desulfurizing agent are: in a hydrogen atmosphere or an atmosphere hydrogen-containing gas, a hydrogen/catalyst volume ratio of 150-500, a reduction temperature of 15-450DEG C, and a reduction pressure of 0.5-3.0MP. The pretreatment method has the characteristics of high desulphurization selectivity and high breakthrough sulfur capacity, and small octane number loss.

Description

technical field [0001] The invention relates to a pretreatment method of adsorption desulfurization agent, which is suitable for the reduction treatment of 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 hydrodesul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/28B01D53/02B01J20/30
CPCB01D53/02B01D2257/302B01J20/06B01J20/08B01J20/28061B01J2220/42
Inventor 姚文君常晓昕李自夏冯琪吴杰王廷海向永生刘敏李景锋王书峰刘蕾
Owner PETROCHINA CO LTD
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