Catalytic hydrogen supply material for preparing methanol and preparation method thereof

Abstract

The invention discloses a catalytic hydrogen supply material for preparing methanol. The catalytic hydrogen supply material comprises the following components in percentage by mass: 10 to 25 percent of needle coke, 1 to 5 percent of Al2O3, 5 to 30 percent of CuO, 2 to 15 percent of ZnO, and the balance of Mg. The catalytic hydrogen supply material can be prepared by a ball milling method, and themethod comprises the following steps of: performing ball milling on the needle coke and Al2O3 in Ar gas; performing ball milling on the needle coke, the Al2O3, the CuO and ZnO in the Ar gas; and finally performing ball milling on the needle coke, the Al2O3, the CuO, ZnO and the Mg in H2 gas. During preparation of the methanol from the catalytic hydrogen supply material, the reaction temperature is only between 210 and 250 DEG C, and the reaction can be performed under normal pressure. Therefore, the problems that the preparation of the methanol needs the presence of high-temperature and high-pressure H2, and has high requirement on the equipment material in the prior art are effectively solved.

Description

technical field [0001] The invention relates to a catalytic hydrogen-donating material, which is used for preparing methanol; the invention also relates to a preparation method of the catalytic hydrogen-donating material. Background technique [0002] Methanol is an important organic chemical raw material, which can be used to produce formaldehyde, acetic acid, acetic anhydride, ethanol, methyl formate, dimethyl carbonate, methyl tert-butyl ether, light olefins and other products, and can also be used for fuel cell power generation , mixed with gasoline as fuel, etc. Methanol can use CO and H 2 Reactive synthesis (CO+2H 2 →CH 3 OH), Cu-based catalysts are generally used in the industrial synthesis of methanol, with an operating temperature of 230-300°C and a pressure of 5-10 MPa. Commonly used Cu-based catalysts are CuO / ZnO / Al 2 o 3 、CuO / ZnO / Cr 2 o 3 、CuO / ZnO / ZrO 2 etc., prepared by the precipitation method. Syngas CO and H 2 The sources of coal gasification, coal...

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Problems solved by technology

[0003] The main problem existing in the original methanol synthesis process is that high-pressure H is required in the gas phase. 2 Existence, resulting in high requirements for equipment materials; molar ratio requirements of effective components in the gas phase (H 2 -CO 2 ): (CO+CO 2 )=2.15~2.25, the single-pass conversion rate is only 7%~8%, and the methanol yield is low; the Cu-based catalyst used is easily deactivated due to CuO grain growth at high temperature, excessive reduction, sulfur and chlorine poisoning, etc.

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