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Compound catalyst as well as preparation method and application of compound catalyst

A technology of catalysts and composites, applied in the field of composite catalysts and their preparation, can solve the problems of cumbersome catalyst preparation steps, poor product selectivity, poor catalyst stability, etc., achieve activity and stability and life improvement, increase pore content and, The effect of increasing the specific surface area

Active Publication Date: 2018-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is the cumbersome catalyst preparation steps in the prior art, poor product selectivity and poor catalyst stability when used in Fischer-Tropsch synthesis, synthesis gas methanation and methane reforming reactions; a composite The catalyst has the advantages of high product selectivity and good catalyst stability when used in Fischer-Tropsch synthesis, syngas methanation and methane reforming reactions

Method used

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  • Compound catalyst as well as preparation method and application of compound catalyst
  • Compound catalyst as well as preparation method and application of compound catalyst
  • Compound catalyst as well as preparation method and application of compound catalyst

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Experimental program
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Effect test

Embodiment 1

[0047] After uniformly mixing 100 grams of boehmite and 25 grams of polyethylene glycol in 200 grams of water, aging treatment was carried out at a temperature of 120° C. for 15 hours to prepare precursor A; 13.6 grams of platinum chloride (equivalent to After uniform mixing of 10g of platinum), 13.7g of sodium nitrate (equivalent to 5g of sodium oxide) and the above-mentioned precursor A, the aging treatment was performed again at a temperature of 160°C for 20 hours to obtain a precursor B, and then the above-mentioned precursor B is dried at a temperature of 120°C for 20 hours; then calcined at a temperature of 550°C for 10 hours; the precursor C is obtained; the above precursor C is reduced at a temperature of 600°C for After 5 hours, the composite catalyst can be obtained. The preparation process conditions are shown in Table 1, and the physical properties of the catalyst are shown in Table 2.

[0048] The catalyst is used for Fischer-Tropsch synthesis, the reaction temper...

Embodiment 2～8

[0052] According to the synthesis steps described in Example 1, changing the type and quality of the inert component precursor, the active component precursor and the surfactant, and adjusting the preparation conditions, the composite catalyst of the present invention can be synthesized, and the preparation process conditions are as shown in the table 1. The physical properties of the catalyst are shown in Table 2.

[0053] The catalysts were used for Fischer-Tropsch synthesis, synthesis gas methanation and methane reforming reactions respectively, the reaction conditions were the same as in Example 1, and the catalytic properties were shown in Table 2.

Embodiment 9

[0055] After uniformly mixing 98 grams of boehmite, 2 grams of magnesium oxide and 25 grams of polyethylene glycol in 200 grams of water, aging treatment was carried out at a temperature of 120 °C for 15 hours to prepare precursor A; 13.6 grams Platinum chloride (equivalent to 10g of platinum), 13.7 grams of sodium nitrate (equivalent to 5g of sodium oxide) and the above-mentioned precursor A were uniformly mixed, and then subjected to aging treatment again at a temperature of 160°C for 20 hours to obtain a precursor B. Subsequently, the above-mentioned precursor B was dried at a temperature of 120°C for 20 hours; then calcined at a temperature of 550°C for 10 hours; the precursor C was obtained; the above-mentioned precursor C was subjected to reduction treatment at a temperature of 600°C for 5 hours, the composite catalyst can be obtained. The preparation process conditions are shown in Table 1, and the physical properties of the catalyst are shown in Table 2.

[0056] The c...

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Abstract

The invention relates to a compound catalyst as well as a preparation method and application of the compound catalyst and mainly aims at solving the problems of low activity, poor product selectivityand poor stability of the existing compound catalyst. The problems such as low activity, poor stability, poor anti-sintering property and easily-caused carbon deposition of the catalyst are better solved by adopting the technical scheme that the compound catalyst and a preparation method thereof are provided; the compound catalyst comprises the following components: (A) inert components: at leastone of silicon oxide, aluminum oxide, magnesium oxide, zirconium oxide and cerium oxide; (B) active components: at least one of platinum, rhodium, palladium, ruthenium, nickel, ferrum, cobalt and copper; and (C) auxiliaries: at least one of alkaline metal oxides; and the porous compound catalyst is a porous compound and has the specific surface area of larger than 5m<2> / g and the pore volume of larger than 0.01cm<3> / g. The compound catalyst can be used for catalyzing industrial production processes of Fischer-Tropsch synthesis, synthesis gas methanation and methane reformation.

Description

technical field [0001] The invention relates to a composite catalyst and a preparation method thereof, in particular to a composite catalyst and a preparation method which can be used for Fischer-Tropsch synthesis, synthesis gas methanation and methane reforming. Background technique [0002] The conversion and utilization of syngas is of great significance in the context of China's energy rich in coal and lack of oil and gas. Both Fischer-Tropsch synthesis and syngas methanation are processes in which syngas is used as raw material to synthesize liquid fuel or methane under catalyst and appropriate reaction conditions. On the other hand, with the exploitation and development of unconventional natural gas in China, especially coalbed methane and shale gas, the chemical utilization of natural gas has attracted increasing attention. Among them, methane reforming is an important process for the chemical utilization of natural gas. The whole process refers to the process of mak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/46B01J23/745B01J23/75B01J23/755B01J35/10B01J27/25B01J27/232C10L3/08C07C1/04C07C9/04C01B3/40
CPCY02P20/52
Inventor 周健陈剑刘志成高焕新
Owner CHINA PETROLEUM & CHEM CORP
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