High-throughput production method for prolonging service life of poly-acidic-group type Fischer-tropsch composite catalyst

A technology of composite catalyst and service life, which is applied in the direction of catalyst activation/preparation, preparation of liquid hydrocarbon mixture, catalyst protection, etc. It can solve the problems of low added value, achieve moderate pore size, not easy to agglomerate and loss, and save production costs.

Active Publication Date: 2016-09-21
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acidic sites of zeolite can effectively crack heavy hydrocarbon products produced by Fischer-Tropsch synthesis, but its strong acidity can also cause excessive cracking to form low value-added products such as methane and ethane

Method used

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  • High-throughput production method for prolonging service life of poly-acidic-group type Fischer-tropsch composite catalyst
  • High-throughput production method for prolonging service life of poly-acidic-group type Fischer-tropsch composite catalyst

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preparation example Construction

[0027] The high-throughput preparation method for prolonging the service life of the multi-acid-based Fischer-Tropsch composite catalyst of the present invention comprises the following steps:

[0028]In step 1, the polyacid with a mass fraction of 1-90% and the Fischer-Tropsch synthesis catalyst with a mass fraction of 10-99% are hydrothermally composited to form a polyacid-based Fischer-Tropsch synthesis catalyst. The polyacid catalyst is any one or several combinations of Keggin type polyacid salts, Dawson type polyacid salts and Lindqvist type polyacid salts, wherein the general formula of Keggin type polyacid salts is: A m h n [XM 12 o 40 ] (A=Li, Na, K, Cs, Mg, Ga, Al, Ce; X=Si, Ge, P, As, B; M=W, Mo; The composition general formula of Dawson type polyacid salt wherein is : A m h n [X 2 m 18 o 62 ] (A=Li, Na, K, Cs; X=P, As; M=W, Mo; m=0-6; n=0-6); The composition general formula of Lindqvist type polyacid salt wherein is: A m h n [X x m y o 19 ] (A = Li, N...

Embodiment 1

[0042] In this example, see figure 2 And Table 1, a high-throughput preparation method for prolonging the service life of multi-acid-based Fischer-Tropsch synthesis catalysts, comprising the following steps:

[0043] 5 g polyacid catalyst H 3 PW 12 o 40 Pour into a beaker with 10 g of deionized water and stir magnetically for 30 minutes until completely dissolved. 5 grams of Fischer-Tropsch synthesis catalyst 10Co / Al 2 o 3 Put it into a beaker and stir it mechanically until the solution containing polyacid is impregnated into the pores of the Fischer-Tropsch synthesis catalyst carrier. Keep soaking for 6 hours, stirring every half hour to ensure full soaking. Then the catalyst in the beaker was transferred to a 25ml polytetrafluoroethylene liner autoclave, heated at 150°C for 72 hours, cooled naturally, taken out after cooling and dried, and roasted at 200°C for 4 hours to obtain a multi-acid-based Fischer-Tropsch composite catalyst. Prepare a solution of TEOS and dilu...

Embodiment 2

[0046] 4 g polyacid catalyst H 4 SiW 12 o 40 Pour into a beaker containing 10 g of deionized water, heat and stir for 5 minutes until completely dissolved. 6 grams of Fischer-Tropsch synthesis catalyst 5Ru / Al 2 o 3 Put it into a beaker and stir until the solution containing the polyacid is impregnated into the pores of the Fischer-Tropsch synthesis catalyst carrier. Leave to soak for 10 hours, stirring every hour to ensure full soaking. Then the catalyst in the beaker was transferred to a 25ml polytetrafluoroethylene liner autoclave, heated at 180°C for 96 hours, cooled naturally, taken out after cooling and dried, and roasted at 300°C for 2 hours to obtain a composite catalyst. Prepare a solution of TEOS and 1M dilute hydrochloric acid with a molar ratio of 1:3, and put it into a high-throughput hydrothermal reactor with a ratio of 1:2 with a multi-acid-based Fischer-Tropsch synthesis catalyst, and heat it to 150 under autogenous pressure o C, kept for 24 hours, then na...

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Abstract

The invention discloses a high-throughput production method for prolonging the service life of a poly-acidic-group type Fischer-tropsch composite catalyst. The method comprises the following steps of forming a poly-acidic-group type Fischer-tropsch composite catalyst through the hydrothermal composite reaction of 1-90% wt% of polyacid and 10-99% wt% of a Fischer-tropsch composite catalyst; preparing a first solution by adopting tetraethoxysilane and diluted hydrochloric acid in the proportion of 1:1 to 1:20; adding the poly-acidic-group type Fischer-tropsch composite catalyst and the first solution in a high-throughput hydrothermal reaction still in the proportion of 1:1 to 1:10 to obtain a poly-acidic-group type Fischer-tropsch composite catalyst sample with a silicone protective layer; adding the poly-acidic-group type Fischer-tropsch composite catalyst sample in a muffle furnace; and adding the obtained poly-acidic-group type Fischer-tropsch composite catalyst into the reaction device of a Fischer-tropsch fixed bed to estimate the reaction performance. In this way, the service life of the poly-acidic-group type Fischer-tropsch composite catalyst is prolonged from 150 hours to over 1000 hours.

Description

technical field [0001] The invention relates to the technical field of catalyst synthesis, in particular to a high-throughput preparation method for prolonging the service life of a multi-acid-based Fischer-Tropsch composite catalyst. Background technique [0002] Polyoxometalates have a wide range of elements, various structural changes, super acidity and good thermal stability, and are new and efficient solid acid catalysts. In some countries, polyacid catalysts have been used industrially in catalytic processes such as esterification, alkylation, and olefin hydration. Fischer-Tropsch synthesis (FTS) is the synthesis of non-petroleum resources such as natural gas, coal, and biomass through synthesis gas (H 2 and CO) into high-quality clean liquid fuels and high value-added chemicals are important industrial catalytic processes. The main products of traditional Fischer-Tropsch synthesis are linear alkanes, which conform to the distribution trend of Anderson-Schulz–Flory (...

Claims

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Application Information

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IPC IPC(8): B01J31/16B01J27/188B01J37/10B01J33/00C10G2/00
CPCB01J23/30B01J27/188B01J33/00B01J37/10C10G2/33C10G2300/70
Inventor 李谦王春玲刘成殷禛昊周国治
Owner SHANGHAI UNIV
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