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Catalyst for preparing low alcohol from synthesis gases as well as preparation method and application of catalyst

A catalyst and low-carbon alcohol technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of full utilization of unfavorable raw materials, poor hydrogenation activity, conversion of unfavorable results, etc. The effect of repeatability, low equipment requirements, and simple preparation method

Inactive Publication Date: 2014-06-04
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0004] To sum up, the following problems generally exist in the production of low-carbon alcohols from syngas: (1) the hydrogenation activity is not good, which is not conducive to the full utilization of raw materials; (2) the reaction conditions are too high, which is not conducive to the conversion of results; (3) ) C 2+ OH selectivity is low, which is a common deficiency of existing catalysts

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  • Catalyst for preparing low alcohol from synthesis gases as well as preparation method and application of catalyst

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preparation example Construction

[0029] Carry out a kind of preparation method of the catalyst that is used for synthesis gas to produce low-carbon alcohol, and its described method is carried out according to the component and content thereof of a kind of catalyst that is used for synthesis gas to produce low-carbon alcohol in the above-mentioned embodiment one , the specific method steps are as follows:

[0030] First, dissolve cobalt nitrate, copper nitrate, and cerium nitrate in deionized water or an organic solvent, and stir to make them evenly mixed;

[0031] Next, carbon nanotubes are slowly added to the above-mentioned mixed solution, and stirred to make it evenly mixed;

[0032] Finally, the above mixture is dried, calcined, tabletted and granulated to 40-60 meshes to obtain a catalyst for producing low-carbon alcohols from syngas.

[0033] In the step (1) in the above specific embodiment, the organic solvent used is one of ethanol, acetone and ethylene glycol.

[0034] In the step (3) in the above s...

Embodiment 1

[0040] By expression Cu 12 co 8 Ce 3 / CNT 77 To prepare the catalyst, dissolve the nitrates of Cu, Co, and Ce in deionized water according to the above expression ratio, then slowly add the CNT in the above expression ratio into the above solution, stir and impregnate for 3 h, and then dry at 120 °C for 5 h . then in N 2 Calcined at 400 °C for 4 h in the atmosphere, cooled to room temperature naturally, then pressed into tablets and granulated to 40-60 mesh.

[0041] Take 1.0 g of the prepared catalyst, transfer it into the reaction tube, and heat it with 30% H 2 and 70 %N 2 The mixed gas was subjected to temperature-programmed reduction for 2 h, under N 2 After the flow drops to the reaction temperature, switch to syngas for reaction, the reaction temperature is 300 °C, the pressure is 3.0 MPa, the space velocity is 12000 ml / (h g), the H 2 The / CO volume ratio is 1. The reaction tail gas was sent to the six-way valve of the gas chromatograph through the insulated...

Embodiment 2

[0043] Catalyst is prepared in the manner of embodiment 1, and difference is that catalyst expression is Cu 15 co 8 Ce 3 / CNT 74 . Catalyst evaluation conditions are T=250 °C, P=5.0 MPa, space velocity is 12000 ml / (h g), H 2 / CO=2, all the other are with embodiment 1. The results obtained are listed in Table 1.

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Abstract

The invention discloses a catalyst for preparing low alcohol from synthesis gases as well as a preparation method and application of the catalyst. The expression of the catalyst is CuaCobCec / CNTd, wherein Cu and Co act as activated components; Ce acts as an additive; the CNT acts as a vector, and a, b, c and d in the expression respectively refer to the mass percentage of Cu, Co, Ce and CNT in the total amount of the catalyst, and a is equal to 10-25%, b is equal to 5-15%, c is equal to 0-10%, and d is equal to 50-85%. The catalyst is prepared by adopting a traditional impregnation method, raw materials are easily available, the preparation method is simple, and no pollution exists, and compared with the similar catalysts, the catalyst has the advantages of mild reaction condition, high and stable catalytic activity, high low carbon mixed alcohol selectivity in byproducts, good repeatability and the like, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a low-carbon alcohol catalyst and its preparation method and application, specifically, a low-carbon alcohol catalyst for synthesis gas production and a preparation method thereof, and the low-carbon alcohol catalyst used in synthesis gas Application in low-carbon alcohol production process. Background technique [0002] With the depletion of petroleum resources and the continuous growth of fuel demand, it is imminent to quickly seek and develop a new energy system. The production of low-carbon alcohols from syngas is one of the important means of clean utilization of coal resources. Low-carbon alcohols can not only be used as chemical raw materials and chemicals, but also as alternative fuels and clean gasoline additives. In recent years, their application value in the fields of chemical industry, fuel and environmental protection has gradually emerged, and related research has become increasingly active. [0003] The curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C07C31/08C07C31/04C07C31/10C07C31/12C07C29/156
CPCY02P20/52
Inventor 黄伟韩涛唐钰阴丽华
Owner TAIYUAN UNIV OF TECH
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