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Composite catalyst for removal of stink and resource recycling of sulfur-containing compounds, preparation method and application thereof

A composite catalyst and oxide technology, applied in the field of environmental pollution control, can solve the problems of strong corrosion ability of equipment pipelines, poor ozone stability, low selectivity, etc., and achieves broad practical industrial application prospects, high purification efficiency, and environmentally friendly effects.

Active Publication Date: 2019-07-05
BIOMINTEC ENVIRONMENT (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the above-mentioned catalysts still have the problems of low catalytic efficiency, low selectivity, and easy deactivation of active components, and ozone as an oxidant has poor stability, is expensive, has strong corrosion ability to equipment and pipelines, and has certain toxicity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Dissolve manganese acetate and lanthanum nitrate in water to form a metal inorganic salt precursor solution, wherein the molar ratio Mn / (Mn+La)=0.2, and the total concentration of binary metals is 0.5mol / L. Take thiourea and dissolve it in water to form a reducing agent solution, the concentration of the reducing agent solution is 0.6mol / L. Weigh 0.5 g of carbon aerogel with a particle size of 0.2-2.0 mm as a carrier, and use the equal volume impregnation method to immerse the carbon aerogel in the metal inorganic salt precursor solution at room temperature for 6 hours, stir evenly, and then place it in an oven After drying at 80 °C for 48 h, the dried sample was placed in a tube furnace with nitrogen as a protective gas, and the temperature was raised to 350 °C for 6 h at a rate of 1 °C / min. Then continue to cool naturally to room temperature under the protection of nitrogen. Finally, using the equal-volume impregnation method, the sample was immersed in 0.6mol / L thio...

Embodiment 2

[0062] Dissolve manganese nitrate and copper sulfate in water to form a metal inorganic salt precursor solution, wherein the molar ratio Mn / (Mn+Cu)=0.8, and the total concentration of binary metals is 3mol / L. Take thiosemicarbazide and dissolve it in water to form a reducing agent solution. The concentration of the reducing agent solution is 3.23mol / L. Weigh 0.5 g of activated carbon fiber as a carrier, adopt the equal volume impregnation method, impregnate the activated carbon fiber in the metal inorganic salt precursor solution at room temperature for 10 h, stir evenly, and then place it in an oven to dry at 100 °C for 20 h, then place the dried sample on the In a tube furnace, nitrogen was introduced as a protective gas, and the temperature was raised to 500°C at a rate of 2°C / min for calcination for 5h. Then continue to cool naturally to room temperature under the protection of nitrogen. Finally, using the equal-volume impregnation method, the sample is immersed in 3.23mo...

Embodiment 3

[0065] Dissolve manganese sulfate and magnesium chloride in water to form a metal-inorganic salt precursor solution, wherein the molar ratio Mn / (Mn+Mg)=0.7, and the total concentration of binary metals is 1.54mol / L. Take thiosemicarbazide and dissolve it in water to form a reducing agent solution. The concentration of the reducing agent solution is 0.86mol / L. Weigh 0.5 g of active coke with a particle size of 0.2-2.0 mm as a carrier, and use the equal-volume impregnation method to immerse the active coke in the metal inorganic salt precursor solution at room temperature for 24 hours, stir evenly, and then place it in an oven at 110 °C After drying for 36 h, the dried sample was placed in a tube furnace, fed with nitrogen as a protective gas, and heated to 700 °C at a rate of 5 °C / min for calcination for 3 h. Then continue to cool naturally to room temperature under the protection of nitrogen. Finally, using the equal-volume impregnation method, immerse the sample in 0.86mol / L...

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Abstract

The invention provides a composite catalyst for removal of stink and resource recycling of sulfur-containing compounds. The composite catalyst comprises the following components by weight percentage:50-90% of a carrier, 5-30% of a metal oxide and 5-30% of a reducing agent. The invention also further provides a preparation method and application of the composite catalyst for removal of stink and resource recycling of sulfur-containing compounds. According to the composite catalyst for removal of stink and resource recycling of sulfur-containing compounds, the preparation method and applicationthereof provided by the invention, the composite catalyst is economical, energy-saving, environment-friendly, and high in purification efficiency, can be used repeatedly, and can be used under complicated conditions with wide reaction temperature range, violent or frequent fluctuation of malodorous gas concentration, is very suitable for the purification field of stationary source malodorous gases containing methyl mercaptan, dimethyl sulfide, dimethyl disulfide, carbon disulfide and other organic sulfur, and has broad practical industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a composite catalyst capable of removing stench and recycling sulfur-containing compounds as well as its preparation method and application, in particular to a catalyst for removing stench and recycling sulfur-containing compounds Composite denitration catalyst loaded with thiourea and its preparation method and application. Background technique [0002] Stench acts on people's sense of smell and causes harm to people. It is one of the seven typical public hazards in the world. Five of the eight odor pollutants restricted and controlled in my country's "Odor Pollutant Emission Standard" (GB14554-1993) are sulfur-containing substances, of which organic sulfur compounds account for as many as four. Organosulfur odor gases mainly include mercaptans, sulfides, carbonyl sulfide, and carbon disulfide, which usually have a strong pungent odor and strong toxicity, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/32B01J31/38B01D53/86C01B17/04B01D53/48
CPCB01D53/8603B01D53/8606B01D2257/306B01D2257/90B01J31/32B01J31/38C01B17/04Y02P20/584
Inventor 徐潜李军
Owner BIOMINTEC ENVIRONMENT (SHANGHAI) CO LTD
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