Molybdenum sulfide-based catalyst for preparing low-carbon alcohol from synthesis gas and preparation method thereof

A technology of alcohol molybdenum sulfide and catalyst, which is applied in the direction of catalyst activation/preparation, preparation of organic compounds, physical/chemical process catalysts, etc. It can solve the problems of few catalytic active sites and low activity, and achieve high selectivity and preparation of C2+ alcohols The effect of simple process and high selectivity of total alcohol

Active Publication Date: 2018-07-27
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molybdenum sulfide-based catalyst prepared by the traditional pyrolysis method has fewer catalytic active sites and lower activity due to high-temperature calcination.

Method used

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  • Molybdenum sulfide-based catalyst for preparing low-carbon alcohol from synthesis gas and preparation method thereof
  • Molybdenum sulfide-based catalyst for preparing low-carbon alcohol from synthesis gas and preparation method thereof
  • Molybdenum sulfide-based catalyst for preparing low-carbon alcohol from synthesis gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 1.2359g ammonium heptamolybdate tetrahydrate and 1.0657g thiourea (Mo:S ratio 1:2) and dissolve in 75ml water, put the solution into a 100ml polytetrafluoroethylene reactor and seal it in a stainless steel shell. The reaction kettle was reacted in an oven at 220°C for 24h. After cooling to room temperature, the solid product was washed three times with water and once with ethanol, and dried at 60°C for 12h. Mix 0.7g of the product with 0.3g of potassium carbonate (Mo:K=1:1), mechanically grind for 1h, press into tablets and sieve to collect the 40-60 mesh catalyst. The K-MoS prepared by the above method 2 Catalysts were evaluated for catalytic performance in a stainless steel fixed-bed reactor. The inner diameter of the reactor is 8mm, the loading amount of the catalyst is 0.4g, the mixed 40-60 mesh quartz sand is filled in the constant temperature section, and the upper preheating section and the lower insulation section are filled with quartz sand. Reaction co...

Embodiment 2

[0019] Weigh 1.2359g ammonium heptamolybdate tetrahydrate and 1.0657g thiourea (Mo:S ratio 1:2) and dissolve in 75ml water, put the solution into a 100ml polytetrafluoroethylene reactor and seal it in a stainless steel shell. The reaction kettle was reacted in an oven at 220°C for 24h. After cooling to room temperature, the solid product was washed three times with water and once with ethanol, and dried at 60°C for 12h. Mix 0.7g of the product with 0.3g of potassium carbonate (Mo:K=1:1), mechanically grind for 1h, press into tablets and sieve to collect the 40-60 mesh catalyst. The K-MoS prepared by the above method 2 Catalysts were evaluated for catalytic performance in a stainless steel fixed-bed reactor. The inner diameter of the reactor is 8mm, the loading amount of the catalyst is 0.4g, the mixed 40-60 mesh quartz sand is filled in the constant temperature section, and the upper preheating section and the lower insulation section are filled with quartz sand. Reaction co...

Embodiment 3

[0021] Weigh 1.2359g of ammonium heptamolybdate tetrahydrate and 1.0657g of thiourea (Mo:S ratio 1:2) and dissolve them in 75ml of water, put the solution into a 100ml polytetrafluoroethylene reactor and seal it in a stainless steel shell. The reaction kettle was reacted in an oven at 220°C for 24h. After cooling to room temperature, the solid product was washed three times with water and once with ethanol, and dried at 60°C for 12h. Mix 0.7g of the product with 0.3g of potassium carbonate (Mo:K=1:1), mechanically grind for 1h, press into tablets and sieve to collect the 40-60 mesh catalyst. The K-MoS prepared by the above method 2 Catalysts were evaluated for catalytic performance in a stainless steel fixed-bed reactor. The inner diameter of the reactor is 8mm, the loading amount of the catalyst is 0.4g, the mixed 40-60 mesh quartz sand is filled in the constant temperature section, and the upper preheating section and the lower insulation section are filled with quartz sand...

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Abstract

The invention relates to a preparation method of a molybdenum sulfide-based catalyst for preparing low-carbon alcohol from synthesis gas. The method comprises the following steps that (1) ammonium molybdate tetrahydrate and thiourea are added into water according to the mole ratio of Mo:S being 1:(2 to 4); after dissolution, a solution A is prepared; (2) the solution A is added into a hydrothermalreaction kettle; reaction is performed at 220 DEG C; products are washed and dried to obtain a precipitate A, i.e., petaloid MoS2; (3) the precipitate A and potassium carbonate are subjected to mechanical grinding according to a mole ratio of Mo:K being 1:(0.5 to 1) to obtain the catalyst for preparing low-carbon alcohol from the synthesis gas. The catalyst has the advantages that the preparationmethod is simple; the sulfur-resistant performance is good; the product total alcohol and C<2+> alcohol selectivity is high, and the like. Good industrial application prospects are realized.

Description

technical field [0001] The invention relates to the technical field of chemical catalysts, in particular to a preparation method and reaction conditions for a molybdenum sulfide-based catalyst used for producing low-carbon alcohols from synthesis gas, and in particular to a molybdenum sulfide-based catalyst prepared by a hydrothermal synthesis method. Background technique [0002] Energy shortage and environmental degradation are major problems facing mankind at present. With the increasing consumption of petroleum resources, the development of efficient and clean "green energy" not only has broad application prospects, but also has very important strategic significance. Among them, the preparation of clean liquid fuels and other high value-added chemicals through the production of syngas from coal or biomass is an important way to cleanly and efficiently utilize energy resources. [0003] Currently, ethanol gasoline (E10) for vehicles sold in China is gasoline blended with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232B01J37/10C07C29/153
CPCC07C29/153B01J27/232B01J37/10Y02P20/52
Inventor 苏海全屈皓李建立
Owner INNER MONGOLIA UNIVERSITY
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