Synthesis gas preparing low carbon mixed alcohol catalyst and method of preparing the same

Abstract

A catalyst for preparing low-carbon mixed alcohol from synthetic gas and preparation method thereof are provided. The invention relates to a Co-Mo-L oxide catalyst promoted by carbon nanotube-based nanomaterial, particularly a catalyst promoted by carbon nanotube-based nanomaterial capable of effectively improving single-pass conversion and selectivity and space-time yield of C2+ alcohol, and used for preparing low carbon mixed alcohol from synthetic gas. The catalyst contains Co-Mo-L oxides and carbon nanotube-based nanomaterial promoter, and is represented by a chemical formulation of CoiMojKk-x per cent(y per cent Co / CNT), and contains Co 20-50%, Mo 35-70%, K 0-3% and the promoter 8-16%. The carbon nanotube-based nanomaterial promoter is multi-wall carbon nanotube or metal Co-modified multi-wall carbon nanotube with a Co content of 1-8%.

Description

technical field [0001] The invention relates to a low-carbon mixed alcohol catalyst, in particular to a cobalt-molybdenum-potassium oxide catalyst promoted by carbon nanotube-based nanomaterials. Background technique [0002] Low-carbon mixed alcohol refers to a series of alcohols containing at least 2 carbon atoms, such as ethanol, propanol, butanol, pentanol, hexanol, etc. (abbreviated as C 2+ -alcohol). Low-carbon mixed alcohols have been proved to be high-octane, low-pollution automotive fuel additives, which can be blended with gasoline to form oil-alcohol hybrid fuels, and can also be used directly alone (Chianelli R R, et al., Catal Today1994, 22(2):361-396). After the world experienced the impact of the second oil crisis in the late 1970s, the research on producing low-carbon mixed alcohols from coal (or natural gas)-based syngas was once paid attention to and made some progress, but so far the low-carbon alcohol synthesis process, its Single-pass conversion rate ...

AI Technical Summary

Problems solved by technology

After the world experienced the impact of the second oil crisis in the late 1970s, the research on producing low-carbon mixed alcohols from coal (or natural gas)-based syngas was once paid attention to and made some progress, but so far the low-carbon alcohol synthesis process, its Single-pass conversion rate of raw syngas and formation of C 2+ -Alcohol selectivity is low, and the main product of most systems is still methanol (such as on alkali-doped molybdenum sulfide-based catalysts) or low-carbon hydrocarbons (such as on modified FT synthesis catalysts), rather than low-carbon hydrocarbons. Carbon (C 2+ ) alcohol (Herman R G.Stud.Surf.Sci.Catal.1991,64:266-349; Forzatti P, et al., Catal.Rev.-Sci.Eng.1991,33(1-2):109- 168; Stiles A B, et al., Ind Eng. Chem. Res. 1991, 30(5): 811-821; Dalmon J A, et al., Catal Today 1992, 15(1): 101-127; Chaumette P, et al., Ind.Eng.Chem.Res.1994, 33 (6): 460-467), there is no large-scale production device in the world so far. In recent years, due to environmental reasons, methyl tert-butyl ether (MTBE ) has been banned as an oil additive in some countries and regions (such as California in the United States), which doubles the practical value of low-carbon alcohol as an oil additive. The industrialization of low-carbon alcohol synthesis technology has aroused the interest of the fuel industry again. The activity and selectivity of the catalyst to improve the efficiency of the production process has become a technical bottleneck restricting the practical and industrialization of the low-carbon alcohol synthesis process

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