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Double-hole carrier iron/ copper low-carbon alcohol synthesis catalyst and preparation method thereof

A pore carrier and catalyst technology, applied in the field of iron/copper catalyst and its preparation, can solve the problems of harsh reaction conditions, low selectivity of higher alcohol products, poor activity and the like, and achieve the effects of good stability, low cost and easy operation

Active Publication Date: 2012-08-15
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the disadvantages of current low-carbon alcohol synthesis catalysts such as poor activity, low selectivity of higher alcohol products, harsh reaction conditions, etc., and provides a catalyst with high activity and C 2 + Low-carbon alcohol synthesis dual-porous carrier iron / copper catalyst with high alcohol selectivity and preparation method thereof

Method used

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  • Double-hole carrier iron/ copper low-carbon alcohol synthesis catalyst and preparation method thereof
  • Double-hole carrier iron/ copper low-carbon alcohol synthesis catalyst and preparation method thereof
  • Double-hole carrier iron/ copper low-carbon alcohol synthesis catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0018] Select small-porous silica sol with a pore size range of 3-5 nm and macro-porous silica gel with a pore size range of 50-60 nm, and immerse an equal volume of small-porous silica sol in the macro-porous silica gel under ultrasonic conditions. The immersion process needs to be fully Stir. After the immersion was completed, it was left to stand for 1 h under ultrasonic conditions, and then placed in an oil bath and evacuated at 80° C. for 1 h. The obtained coagulum was crushed to 40-180 mesh and then calcined at 600° C. for 2 hours to obtain a double-porous carrier. For the texture properties of the double-porous carrier, see figure 1 , the weight percentage of the small-porous silica sol in the carrier relative to the macro-porous silica gel is 20%.

[0019] A mixed solution formed by dissolving 36 grams of ferric nitrate, 152 grams of copper nitrate and 1.3 grams of potassium nitrate in 100 ml of distilled water was immersed in a double-porous carrier by an equal volu...

Embodiment 2

[0022] Select small-porous silica sol with a pore size range of 5-8 nm and macro-porous silica gel with a pore size range of 60-70 nm, and immerse an equal volume of small-porous silica sol in the macro-porous silica gel under ultrasonic conditions. The impregnation process needs to be fully Stir. After the immersion was completed, it was left to stand for 3 hours under ultrasonic conditions, and then placed in an oil bath and evacuated at 60 °C for 2 hours. The obtained coagulum was crushed to 40-180 mesh and then calcined at 500° C. for 4 hours to obtain a double-porous carrier. The weight percentage of the small porous silica sol relative to the macroporous silica gel in the carrier is 10%.

[0023] A mixed solution formed by dissolving 15 grams of ferric nitrate, 57 grams of copper nitrate and 15 grams of potassium nitrate in 100 ml of distilled water was immersed in a double-porous carrier by an equal volume impregnation method under ultrasonic conditions. The carrier d...

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Abstract

The invention provides a double-hole carrier iron / copper low-carbon alcohol synthesis catalyst with high activity and C<2+> alcohol selectivity, and a preparation method of the double-hole carrier iron / copper low-carbon alcohol synthesis catalyst. The double-hole carrier iron / copper low-carbon alcohol synthesis catalyst comprises Cu, Fe, K and M by weight percentage: 10-40% of Cu, 1-10% of Fe, 0.5-10% of K and 40-80% of M, wherein M is a double-hole carrier prepared from macroporous silica gel and ostiole colloidal silica. The preparation method comprises the steps of: dipping the ostiole colloidal silica in the macroporous silica gel in an isopyknic way, and preparing the double-hole carrier; then, dissolving metal in distilled water in a form of nitrate, and forming a mixed solution; and dipping the double-hole carrier in the mixed solution in an isopyknic way, and preparing the catalyst. The double-hole carrier iron / copper low-carbon alcohol synthesis catalyst prepared by the invention can be applied to the reaction for preparing low-carbon alcohol by synthesis gas, is simple in preparation technology, easy to operate, high in strength of the prepared catalyst and good in stability, and has high activity and C<2+> alcohol selectivity.

Description

technical field [0001] The invention relates to an iron / copper catalyst and a preparation method thereof, in particular to a bi-porous carrier iron / copper catalyst used for the synthesis of low-carbon mixed alcohols and a preparation method thereof. technical background [0002] Energy is the basis for the survival and development of modern society. The supply capacity of clean fuel is related to the sustainable development of the national economy and is one of the foundations of national strategic security. At present, my country's liquid fuels (gasoline, diesel, LPG, etc.) mainly come from petroleum. With the increasing depletion of petroleum resources, the supply of liquid fuels will face a huge threat. Since the discovery of the alcohol synthesis process in the Fischer-Tropsch synthesis (F-T synthesis), the selective catalytic synthesis of low-carbon mixed alcohols by CO hydrogenation has been considered to be of great industrial value and application prospects. Low-car...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J35/10C07C29/156C07C31/04C07C31/08C07C31/10
CPCY02P20/52
Inventor 定明月王铁军刘建国李宇萍马隆龙吴创之
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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