Molybdenum-based catalyst for preparing low-carbon alcohol from synthesis gas by taking alkaline carrier material mesoporous NiO-Al2O3 as carrier and preparation method of molybdenum-based catalyst

Abstract

The invention discloses a molybdenum-based catalyst for preparing low-carbon alcohol from synthesis gas by taking an alkaline carrier material, namely mesoporous NiO-Al2O3 as a carrier and a preparation method of the molybdenum-based catalyst, belonging to the technical field of catalysts. The catalyst is prepared by the following steps: synthesizing a precursor NiAl-LDH; subjecting the obtained NiAl-LDH is to heating calcination to a obtain a calcined material NiO-Al2O3; preparing MoS2-NiO-Al2O3 by dissolving (NH4)2MoS4 in concentrated ammoniacal liquor, adding NiO-Al2O3, conducting continuous stirring, performing drying in the air, and successively carrying out grinding, firing and cooling to obtain MoS2-NiO-Al2O3; and subjecting MoS2-NiO-Al2O3 and K2CO3 to grinding, mixing and tabletting, and carrying out sieving so as to obtain K-Mo-S / NiO-Al2O3. The catalyst has the advantages of excellent activity for preparing low-carbon alcohol from synthesis gas, high alcohol selectivity and operation stability, low cost and convenience in preparation.

Description

technical field [0001] The present invention belongs to the synthesis gas (CO and H 2 ) to the catalyst technical field of mixing low-carbon alcohols, in particular to a kind of basic carrier material mesoporous NiO-Al 2 o 3 A molybdenum-based catalyst for preparing low-carbon alcohols from synthesis gas as a carrier and a preparation method thereof. Background technique [0002] Low-carbon mixed alcohol is referred to as low-carbon alcohol, which refers to the 1 ~C 5 A liquid mixture of alcohols. Low-carbon alcohols have a high octane number, good miscibility with gasoline, and excellent combustion and chemical processing properties. They can replace methyl tert-butyl ether (MTBE), which is heavily polluted, and become the first choice for clean gasoline additives. Low-carbon alcohol can also be used as a new generation of low-pollution clean fuel to directly replace petroleum. At the same time, ethanol etc. C 2+ Alcohol (a mixture of ethanol, propanol, butanol, pent...

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Problems solved by technology

[0004] Although MoS modified by alkali metal compound additives 2 The base catalyst has good performance in synthesizing low-carbon alcohols, but it is far from the requirements of large-scale industrial production. The main problem is that the yield of alcohol is low and the content of methanol in the product is relatively high.

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