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Red mud-based catalyst for synthesizing low-carbon alcohol as well as preparation method and application of red mud-based catalyst

A catalyst and low-carbon alcohol technology, which is applied in the preparation of organic compounds, chemical instruments and methods, and the preparation of hydroxyl compounds. It can solve the problems of low selectivity and low utilization of C2+ alcohols, and achieve increased selectivity and improved utilization. The effect of high efficiency and stable performance

Pending Publication Date: 2022-08-05
HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN108465468B uses carbon nanotubes as a carrier to prepare catalysts for synthesis gas to produce low-carbon alcohols, and the selectivity of C2+ alcohols in the obtained products is not high
my country's red mud discharge is increasing year by year, about 60 million tons of red mud is discharged every year, but the utilization rate is very low

Method used

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  • Red mud-based catalyst for synthesizing low-carbon alcohol as well as preparation method and application of red mud-based catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0018] A red mud-based catalyst for synthesizing low-carbon alcohols, the preparation process is as follows:

[0019] 1) Preparation of catalyst carrier: soak the collected red mud in an ethanol solution (volume concentration of 95%, the same below), ultrasonically treat for 2h, then wash with distilled water for 5 times to neutrality, filter and dry to obtain the treated red mud vector. The mass ratio of red mud to ethanol solution is 1:4.

[0020] 2) Preparation of catalyst by impregnation: according to the molar ratio of Cu:Mo:Zr:Ce=1:0.3:0.064:0.072, the nitrates and ammonium molybdate of copper, zirconium and cerium are dissolved in water to prepare a mixed solution. Under vacuum conditions, impregnate 1 g of the red mud carrier obtained in step 1) with the above mixed solution, then suction filtration, and then dry the impregnated catalyst precursor at 100° C. and calcinate at 450° C. to obtain a low-carbon alcohol for synthesizing. 2.5g of red mud-based catalyst, in w...

Embodiment 2

[0024] A red mud-based catalyst for synthesizing low-carbon alcohols, the preparation process is as follows:

[0025] 1) Preparation of catalyst carrier: soak the collected red mud in an ethanol solution, ultrasonically treat it at 50° C. for 2 hours, then wash it with distilled water for 6 times until neutral, suction filter and dry to obtain the treated red mud carrier. The mass ratio of red mud to ethanol solution is 1:4.

[0026] 2) Preparation of catalyst by impregnation: according to the molar ratio of Cu:Co:Cr:Ce=1:0.2:0.055:0.064, the nitrates of copper, cobalt, chromium and cerium are dissolved in water to prepare a mixed solution. Under vacuum conditions, impregnate 1 g of the red mud carrier obtained in step 1) with the above mixed solution, then suction filtration, and then dry the impregnated catalyst precursor at 100 ° C and calcinate at 400 ° C to obtain a low-carbon alcohol for synthesis. 2g of red mud-based catalyst, in which the red mud carrier accounts for ...

Embodiment 3

[0029] The reaction of preparing the catalyst carrier, impregnating the catalyst for preparing the catalyst and synthesizing the lower alcohol is the same as that in Example 1, except that the molar ratio of the metal elements used is Cu:Mo:Zr:La=1:0.3:0.055:0.064.

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Abstract

The invention belongs to the technical field of biomass energy utilization, and particularly relates to a red mud-based catalyst for synthesizing low-carbon alcohol as well as preparation and application of the red mud-based catalyst. The catalyst takes red mud as a carrier, an active component is Cu, and an auxiliary agent is one or more of Rh, Mo, Zr, La, Ce, Mn, Co and Cr. The mass content of the active component in the catalyst is 10-80%, the mass content of the auxiliary agent is 10-50%, and the balance is the carrier. The catalyst is prepared by taking the red mud as the carrier and is applied to the reaction for preparing the low-carbon alcohol from the biomass synthesis gas, so that the utilization rate of biomass resources is increased, the problems of high catalyst cost, low CO conversion rate and low C2 + alcohol selectivity in the reaction for preparing the low-carbon alcohol from the synthesis gas in the prior art are solved, and the catalyst has industrial application potential.

Description

technical field [0001] The invention belongs to the technical field of biomass energy utilization, and in particular relates to a red mud-based catalyst for synthesizing low-carbon alcohols and its preparation and application. Background technique [0002] The crisis and problems faced by traditional fossil energy have made the development of new clean energy increasingly important. Syngas is produced as CO and H 2 A chemical raw material gas as the main component, which is derived from coal and biomass, etc., can be directly converted into oxygen-containing compounds such as alcohols under the action of a catalyst, and has practical significance as a source of chemical raw materials and energy. At present, the conversion of synthesis gas into low-carbon alcohols for liquid fuels is gradually becoming a green energy utilization model. However, the existing low-carbon alcohol synthesis reactions have the problems of low CO conversion and low-carbon alcohol selectivity. Among...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887B01J23/86B01J23/89B01J23/889C07C29/154C07C29/156C07C29/158C07C31/02
CPCB01J23/8871B01J23/868B01J23/8993B01J23/8892B01J23/894B01J23/002C07C29/154C07C29/156C07C29/158B01J2523/00C07C31/02B01J2523/17B01J2523/3712B01J2523/48B01J2523/68B01J2523/842B01J2523/67B01J2523/845B01J2523/3706B01J2523/822B01J2523/72Y02P20/52
Inventor 关倩徐海燕杨树华张竟月何晓峰师新广尚延峰
Owner HENAN ACAD OF SCI
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