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Nanoscale molybdenum-containing desulfurization catalyst and preparation method thereof

A desulfurization catalyst and nano-scale technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problem of high cost of hydrogen sulfide decomposition, achieve stable and efficient decomposition process, improve desulfurization accuracy, and increase catalytic efficiency. Effect

Pending Publication Date: 2022-08-05
上海尼普敦环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims at the problem of high hydrogen sulfide decomposition cost caused by high reaction temperature in the existing hydrogen sulfide decomposition process, and provides a catalyst for decomposing hydrogen sulfide gas at a lower temperature and a preparation method thereof, which reduces the decomposition cost of hydrogen sulfide in biogas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of 0.3mol / L iron pentacarbonyl n-decane slurry, fully degassed with nitrogen, crushed for 3h by ultrasonic crusher, operating frequency 20kHz, pulse duty ratio 75%, centrifuged to remove supernatant The solution was washed with n-decane for 3 times, and dried at 185 °C for 10 h to obtain black ferric oxide powder. The average particle size is 11nm and the specific surface area is 54m 2 / g.

[0023] Prepare 0.4mol / L molybdenum hexacarbonyl n-decane slurry, fully degassed with nitrogen, pass through ultrasonic crusher, under the setting of working frequency 20kHz, pulse duty ratio 80%, crush for 4h, remove supernatant by centrifugation The solution was washed three times with n-decane, and dried at 185 °C for 10 h to obtain silver-gray molybdenum oxide powder. The average particle size is 16nm and the specific surface area is 58m 2 / g.

[0024] The catalyst was obtained by thoroughly mixing the two nano-scale powders in a ratio of 6:1 of iron and molybdenu...

Embodiment 2

[0026] Commercially available nano-copper oxide was used. The average particle size is 22nm and the specific surface area is 43m 2 / g.

[0027] Prepare 0.4mol / L molybdenum hexacarbonyl n-decane slurry, fully degassed with nitrogen, pass through ultrasonic crusher, under the setting of working frequency 20kHz, pulse duty ratio 80%, crush for 4h, remove supernatant by centrifugation The solution was washed three times with n-decane, and dried at 185 °C for 12 h to obtain silver-gray molybdenum oxide powder. The average particle size is 16nm and the specific surface area is 58m 2 / g.

[0028] The catalyst was obtained by thoroughly mixing the two nanoscale powders in a ratio of 5:1 of copper and molybdenum.

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Abstract

The invention provides a nanoscale molybdenum-containing desulfurization catalyst and a preparation method thereof.The catalyst is composed of nanoscale molybdenum oxide, nanoscale ferroferric oxide or nanoscale copper oxide, a main catalyst is iron or copper oxide, the molar ratio of iron or copper to molybdenum in the catalyst is 4: 1-8: 1, the catalyst can catalytically decompose hydrogen sulfide into hydrogen and sulfur steam at the temperature of 200-250 DEG C, and the catalyst can catalytically decompose hydrogen sulfide into sulfur steam at the temperature of 200-250 DEG C; the average particle size of the catalyst is 10-30 nm, the specific surface area of the catalyst is 40-100 m < 2 > / g, and nanoscale metal oxide can be obtained in an ultrasonic synthesis mode.

Description

technical field [0001] The invention relates to a nano-scale molybdenum-containing desulfurization catalyst and a preparation method thereof, belonging to the technical field of hydrogen sulfide gas treatment in biogas. Background technique [0002] With the continuous improvement of social economy and people's living standards, the amount of organic waste generated by people is increasing year by year, and the source of biogas generation has expanded from the early decentralized rural septic tanks to large-scale landfills, large-scale organic waste treatment plants anaerobic digestion Large-scale man-made organic matter treatment facilities such as centralized high-concentration organic wastewater anaerobic digestion tanks, etc., have a huge amount of production and can be used as a clean and renewable energy source. [0003] The main components of biogas are methane and carbon dioxide, but it contains a large amount of impurities, such as hydrogen sulfide gas. If it is not...

Claims

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Application Information

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IPC IPC(8): B01J23/881B01J23/885B01J35/10B01D53/86B01D53/52
CPCB01J23/881B01J23/885B01D53/8612B01D2257/304B01D2258/05B01J35/23B01J35/613Y02P20/59
Inventor 金泰峰
Owner 上海尼普敦环境科技有限公司