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Absorbent charcoal based catalyst for hydrolyzation and catalysis of carbonyl sulphur in low-temperature and preparation method thereof

A technology of activated carbon and carbonyl sulfide, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of high energy consumption, high operating costs, and applicable removal concentration Low range and other problems, to achieve the effect of high breakthrough sulfur capacity and high desulfurization precision

Inactive Publication Date: 2008-12-10
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The shortcomings of the above-mentioned catalysts mainly include: (1) the temperature of catalytic hydrolysis is high, and sulfation poisoning is prone to occur; (2) large energy consumption, large investment, high operating costs, and easy to bring side reactions; (3) COS The application range of removal concentration is low, generally less than 300ppm

Method used

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  • Absorbent charcoal based catalyst for hydrolyzation and catalysis of carbonyl sulphur in low-temperature and preparation method thereof
  • Absorbent charcoal based catalyst for hydrolyzation and catalysis of carbonyl sulphur in low-temperature and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] A. Take 10 grams of coal-based activated carbon and grind it into 40-60 meshes, wash it with tap water and distilled water for 3 times, and then dry it in a constant temperature drying oven at 120°C for 3 hours;

[0022] B. Use 1 gram of KOH and 1 gram of KMnO 4 , 0.1 g Ce(NO 3 ) 3 and 0.5 g NHVO 3 Prepare 10ml of impregnating solution, put the dry activated carbon in step A into it and impregnate for 10 hours;

[0023] C. Dry the impregnated activated carbon in step B in a constant temperature drying oven at 120°C for 3 hours, then put it into a tube furnace, and dry it at 300°CN 2 Activated under protection for 4 hours to obtain an activated carbon-based catalyst.

[0024] When the obtained activated carbon-based catalyst is used to remove COS, the catalyst is installed in a fixed bed reactor (Φ8mm×200mm), and the reaction conditions are: activated carbon-based catalyst 3.00g, temperature 50°C, space velocity 1000h -1 , COS concentration 590ppm, oxygen concentrat...

Embodiment 2

[0027] A. Take 10g of wood-based activated carbon and grind it into 40-60 meshes, wash it twice with tap water and distilled water, and then dry it in a constant temperature drying oven at 100°C for 4 hours;

[0028] B, with 0.5 grams (NH 4 ) 6 mn 7 o 24 and 0.5 g KOH, 0.01 g dinuclear cobalt phthalocyanine sulfonate and 0.5 g MnAc 2 Prepare 10m impregnating liquid, put the activated carbon of step A into it and impregnate for 6 hours;

[0029] C. Dry the impregnated activated carbon in step B in a constant temperature drying oven at 100°C for 6 hours, then put it into a tube furnace, and dry it at 500°CN 2 Activated under protection for 2 hours to obtain an activated carbon-based catalyst.

[0030]When using the obtained activated carbon-based catalyst to remove COS, the catalyst is installed in a fixed-bed reactor (Φ8mm×200mm), and the reaction conditions are: catalyst 3.00g, temperature 50°C, space velocity 1000h -1 , COS concentration 510ppm, oxygen concentration 0.2...

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Abstract

The invention provides an active carbon based catalyst for hydrolyzing and catalyzing carbonyl sulfur in low temperature, which is characterized in that the catalyst takes active carbon as a carrier and is prepared by the following method: washing the active carbon, drying the active carbon for 2-4 hours under 100-140 DEG C; impregnating the active carbon in the (A) step for 6-12 hours with the impregnation liquid of alkaline substances or metal oxides or organic alcohol amine, wherein, the mass content of the alkaline substances or the metal oxides or the organic alcohol amine accounts for 5-30 percent of that of the active carbon; drying the impregnated active carbon for 2-6 hours under the constant temperature of 100-140 DEG C and then activating the active carbon for 2-4 hours under the temperature of 300-500 DEG C and the protection of N2. The catalyst can be used for catalyzing and hydrolyzing COS and removing H2S; furthermore, the catalyst can remove the COS in the gas under the temperature of 30-100 DEG C, ensure the conversion rate of the COS to be larger than 90 percent and remove the H2S generated in hydrolysis at the same time. The COS concentration which is between 100-1500ppm has a wide adaptive range, high desulfurization accuracy and higher breakthrough sulfur capacity.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, a catalyst for removing carbonyl sulfide and hydrogen sulfide at a low temperature and a preparation method thereof, in particular to a catalyst for removing carbonyl sulfide and hydrogen sulfide in raw materials at a low temperature and a preparation method thereof. Background technique [0002] Carbonyl sulfide (COS) and hydrogen sulfide (H 2 S) Widely exists in the waste gas produced when coal, petroleum, and natural gas are used as raw materials for synthetic ammonia, methanol production, and viscose fiber production. The existence of sulfide will not only pollute the environment, but also corrode the pipeline, which will cause catalyst poisoning and deactivation in the subsequent production process, thereby affecting the quality of subsequent chemical products. Especially in the industrial production of synthetic ammonia, they are the main factors to deactivate catalysts such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/16B01J23/10B01J31/02B01J21/18B01D53/48
Inventor 易红宏于丽丽唐晓龙宁平
Owner KUNMING UNIV OF SCI & TECH
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