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Catalyst for decomposing hydrogen sulfide by photocatalysis and preparation method of hydrogen and liquid sulfur by employing same

A catalyst and hydrogen sulfide technology, applied in the field of catalysis, can solve problems such as difficult separation and complex sulfur recovery process, and achieve the effects of high activity, easy realization of reaction conditions, and easy control of the reaction

Active Publication Date: 2012-11-07
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the sulfur contained in hydrogen sulfide is not fully recycled and utilized in the process of photocatalytic decomposition of hydrogen sulfide in the prior art, and the process of recovering sulfur is relatively complicated and the separation is relatively difficult. A catalyst for photocatalytically decomposing hydrogen sulfide and a method for using the catalyst to decompose hydrogen sulfide to prepare hydrogen and liquid sulfur that is easily separated from the catalyst

Method used

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  • Catalyst for decomposing hydrogen sulfide by photocatalysis and preparation method of hydrogen and liquid sulfur by employing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 140g Na 2 Ta 2 o 7 and 44g Ba(OH) 2 Mix and stir at room temperature for 6 hours, and then dry in an oven at 110°C for 6 hours for later use; assuming that the mass percentage of NiO in the finished catalyst is 7.5%, take 0.2027mol Ni(NO 3 ) 2 Prepare a solution, impregnate with the above mixed sample, dry in an oven at 110°C for 6 hours after impregnation, and roast at 650°C for 4 hours to obtain the catalyst required for the reaction. The catalyst was ground to 40 mesh particles as the reaction catalyst. The mass percentage of the carrier in the finally obtained catalyst was 70.3%, the mass percentage of the active component was 22.1%, and the mass percentage of the auxiliary agent was 7.5%.

Embodiment 2

[0027] 50g NH 4 VO 3 and 45g LiOH were mixed and stirred at room temperature for 6 hours, and then dried in an oven at 110°C for 6 hours for later use; Fe in the finished catalyst 2 o 3 Calculated as 5% by mass, take 0.0625mol Fe(OH) 3 Prepare a solution, impregnate with the above mixed sample, dry in an oven at 110°C for 6 hours after impregnation, and roast at 650°C for 4 hours to obtain the catalyst required for the reaction. The catalyst was ground to 80 mesh particles as the reaction catalyst. The mass percent content of the carrier in the finally obtained catalyst is 50%, the mass percent content of the active component is 45%, and the mass percent content of the auxiliary agent is 5%.

Embodiment 3

[0029] 85g NaNbO 3 and 10gNa 2 CO 3 Mix and stir at room temperature for 6 hours, then dry in an oven at 110°C for 6 hours for later use; 3 o 4 Calculated as 5% by mass, take 0.0622mol Co(NO 3 ) 2 Prepare a solution, impregnate with the above mixed sample, dry in an oven at 110°C for 6 hours after impregnation, and roast at 650°C for 4 hours to obtain the catalyst required for the reaction. The catalyst was ground to 60 mesh particles as the reaction catalyst. The mass percent content of the carrier in the finally obtained catalyst is 85%, the mass percent content of the active component is 10%, and the mass percent content of the auxiliary agent is 5%.

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Abstract

The invention relates to a catalyst for decomposing hydrogen sulfide by photocatalysis and a preparation method of hydrogen and liquid sulfur by employing same. The catalyst comprises a carrier, active component and assistant and has the characteristics that the carrier is one or more selected from vanadate, niobate and tantalate, the active component is one or more selected from alkali metal hydroxide, alkaline earth metal hydroxide, alkali metal nonmetal oxysalt, alkali metal nonoxysalt, alkaline earth metal nonmetal oxysalt and alkaline earth metal nonoxysalt and the assistant is lanthanide oxide or VIII group oxide. The catalyst of the invention can be used for preparing hydrogen and liquid sulfur so that the produced sulfur is easy to be separated from the catalyst, the catalyst can be recycled and the sulfur contained in hydrogen sulfide can be fully recycled, thus realizing the comprehensive utilization of hydrogen sulfide.

Description

technical field [0001] The invention relates to a catalyst for photocatalytically decomposing hydrogen sulfide and a method for preparing hydrogen and liquid sulfur by using the catalyst to decompose hydrogen sulfide, belonging to the technical field of catalysis. Background technique [0002] Hydrogen sulfide is a by-product in the petroleum refining process, and its direct discharge not only pollutes the environment, but also causes a waste of available resources. Therefore, the treatment of hydrogen sulfide has always attracted people's attention. At present, for the treatment of hydrogen sulfide, large and medium-sized refineries in my country usually adopt the traditional Claus method to recover sulfur in hydrogen sulfide, and hydrogen generates water during the oxidation process. Considering the comprehensive utilization of resources, the traditional hydrogen sulfide recovery process is a waste of hydrogen resources. On the one hand, hydrogen, as a clean and non-pollu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/847B01J23/22B01J23/20C01B3/04C01B17/04B01D53/52B01D53/86
CPCY02E60/364Y02E60/36Y02P20/584
Inventor 王宏伟闻学兵蒲延芳
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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