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Method for hydrogenating carbon disulfide by using magnesium-based hydrogen storage materials

A technology for hydrogen storage material and carbon disulfide, which is applied in the purification of hydrogen sulfide and the catalytic conversion gas of impurities, etc., can solve the problems of high material requirements, easy deactivation, and low catalyst resources, and achieve the effect of low material requirements.

Inactive Publication Date: 2010-06-16
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used sulfide hydrogenation catalysts are generally iron-molybdenum, nickel-molybdenum, and cobalt-molybdenum. The reaction temperature is 350-450°C and the reaction pressure is 1.0-2.5MPa. High, easy to deactivate, hydrogenation reaction is carried out under high temperature and high pressure, resulting in high requirements for equipment materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put aluminum oxide powder with an average particle size of 10nm, 15g and γ-phase crystal into a reaction tube with a diameter of 20mm, heat it to 600°C, and let methane gas flow for about 30 minutes to thermally decompose the solid in the tube, that is, methane The mixture of deposited carbon and aluminum oxide powder can be taken out after weighing up to 30g, and the solid is mixed with magnesium powder with a particle size of less than 74μm and a weight of 70g to form a three-component mixture. The weight ratio of aluminum oxide powder, methane pyrolysis deposited carbon and magnesium powder in the above three-component mixture is 15:15:70. Put the above-mentioned three-component mixture into a 250mL vacuum ball mill tank, the mass ratio of balls to materials is 40:1, replace the air in the ball mill tank with hydrogen gas, then fill it with hydrogen gas to 2MPa, and place it in a ND7-2 planetary ball mill Ball mill for 3 hours, the spindle speed of the ball mill is 2...

Embodiment 2

[0017] The difference from Example 1 is that the temperature for thermal decomposition of methane is 1000° C. and the time is 15 minutes. The weight ratio of aluminum oxide powder, methane pyrolysis deposited carbon and magnesium powder in the three-component mixture is 5:5:90. After the prepared hydrogen storage material reacted with carbon disulfide, it was measured that 25% of the hydrogen in the hydrogen storage material was converted into hydrogen sulfide.

Embodiment 3

[0019] The difference from Example 1 is that the weight ratio of aluminum oxide powder, methane pyrolysis deposited carbon and magnesium powder in the three-component mixture is 10:10:80. The temperature for thermal decomposition of methane is 1000°C and the time is 20 minutes. After the prepared hydrogen storage material reacted with carbon disulfide, it was measured that 23% of the hydrogen in the hydrogen storage material was converted into hydrogen sulfide.

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Abstract

The invention discloses a method for hydrogenating carbon disulfide by using magnesium-based hydrogen storage materials, which is characterized by comprising the following steps: preparing hydrogen storage materials by using aluminum oxide, magnesium and carbon generated by thermal decomposition and deposition of methane as raw materials; and enabling the carbon disulfide to be in contact with the hydrogen storage materials obtained in the previous step for reacting under the temperature condition of 200-300 DEG C to generate hydrogen sulfide. In the invention, the magnesium-based hydrogen storage materials used as hydrogen sources and catalysts for hydrogenating the carbon disulfide, the technical mode of using rare metals and heavy metals as catalysts in the prior art is changed, the carbon disulfide is hydrogenated and converted into the hydrogen sulfide under ordinary pressure, the reaction temperature is not higher than 300 DEG C, and the requirement for the material quality of a hydrogenation reactor is low.

Description

technical field [0001] The invention relates to a method for hydrogenating carbon disulfide with a magnesium-based hydrogen storage material. Background technique [0002] When coke oven gas is used to synthesize methanol, copper-based catalysts are generally used in the methane conversion reaction and methanol synthesis reaction in the process. Copper-based catalysts are sensitive to sulfur and are prone to sulfide poisoning. Therefore, it is necessary to perform deep purification of coke oven gas to remove sulfur-containing compounds as much as possible. The coke oven gas is desulfurized by wet desulfurization (alcohol amine method, AS method, ADA method, picric acid method, HPF method, 888 method, tannin extraction method) to remove hydrogen sulfide, and then the coke oven gas is generally decomposed by hydroconversion The carbon disulfide, thiophene, mercaptan, etc. in the hydrogenation reaction are converted into hydrogen sulfide, and then the hydrogen sulfide is absor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/16C10K1/34
Inventor 周仕学张鸣林张同环马怀营张光伟陈海鹏王斌杨敏建李桂江
Owner SHANDONG UNIV OF SCI & TECH
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