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Catalyst composition for preparing low-carbon hydrocarbons from synthesis gas and application of catalyst composition

A catalyst and synthesis gas technology, applied in molecular sieve catalysts, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as high olefin ratio, high single-pass conversion rate, and low CO conversion rate

Active Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the shortcomings of low conversion rate of CO and low selectivity of low-carbon hydrocarbons in the prior art, and provide a new modified catalyst for preparing low-carbon hydrocarbons from synthesis gas. When reacting low-carbon hydrocarbons, it has the advantages of high single-pass conversion rate of CO, high selectivity of C2-C4 hydrocarbons, and high olefin ratio

Method used

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  • Catalyst composition for preparing low-carbon hydrocarbons from synthesis gas and application of catalyst composition
  • Catalyst composition for preparing low-carbon hydrocarbons from synthesis gas and application of catalyst composition
  • Catalyst composition for preparing low-carbon hydrocarbons from synthesis gas and application of catalyst composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] InZr 0.5 K 0.02 Catalyst is prepared as follows:

[0037] 25.46g In(NO 3 ) 3 4.5H 2 O and 14.32g Zr(NO 3 ) 4 ·5H 2 Dissolve O in 200ml of water, stir well, and continue stirring for 10 minutes after all dissolve. 14.4g (NH 4 )2 CO 3 Dissolve in 150ml of water and stir until completely dissolved. Drop the two solutions into 20ml of water at the same time, and the ratio of dropping speed is 4:3. Keep stirring while dropping, and keep the solution temperature at 70°C, continue to stir for 3 hours after the dropwise addition, filter the obtained precipitate and wash it with water until neutral, put it in an oven at 80°C for 12 hours, and break it to obtain a powder solid , and then ground and mixed with 107 mg of anhydrous potassium carbonate, and then calcined at 500° C. for 1 hour.

[0038] After the calcined catalyst is crushed, it is pressed into tablets to 20-40 mesh and mixed evenly with SAPO-34 of the same size and quality.

[0039] Catalyst evaluations ...

Embodiment 2

[0041] InZr 0.5 Na 0.02 Catalyst is prepared as follows:

[0042] 25.46g In(NO 3 ) 3 4.5H 2 O and 14.32g Zr(NO 3 ) 4 ·5H 2 Dissolve O in 200ml of water, stir well, and continue stirring for 10 minutes after all dissolve. 14.4g (NH 4 ) 2 CO 3 Dissolve in 150ml of water and stir until completely dissolved. Drop the two solutions into 20ml of water at the same time, and the ratio of dropping speed is 4:3. Keep stirring while dropping, and keep the solution temperature at 70°C, continue to stir for 3 hours after the dropwise addition, filter the obtained precipitate and wash it with water until neutral, put it in an oven at 80°C for 12 hours, and break it to obtain a powder solid , and then ground and mixed with 82mg of anhydrous sodium carbonate, and then calcined at 500°C for 1 hour.

[0043] After the calcined catalyst is crushed, it is pressed into tablets to 20-40 mesh and mixed evenly with SAPO-34 of the same size and quality.

[0044] Catalyst evaluations were...

Embodiment 3

[0046] InZr 0.5 K 0.01 Catalyst is prepared as follows:

[0047] 25.46g In(NO 3 ) 3 4.5H 2 O and 14.32g Zr(NO 3 ) 4 ·5H 2 Dissolve O in 200ml of water, stir well, and continue stirring for 10 minutes after all dissolve. 14.4g (NH 4 ) 2 CO 3 Dissolve in 150ml of water and stir until completely dissolved. Drop the two solutions into 20ml of water at the same time, and the ratio of dropping speed is 4:3. Keep stirring while dropping, and keep the solution temperature at 70°C, continue to stir for 3 hours after the dropwise addition, filter the obtained precipitate and wash it with water until neutral, put it in an oven at 80°C for 12 hours, and break it to obtain a powder solid , and then ground and mixed with 54 mg of anhydrous potassium carbonate, and then calcined at 500° C. for 1 hour.

[0048] After the calcined catalyst is crushed, it is pressed into tablets to 20-40 mesh and mixed evenly with SAPO-34 of the same size and quality.

[0049] Catalyst evaluations...

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Abstract

The invention belongs to the technical field of chemistry and chemical engineering, the invention relates to a preparation method and application of a catalyst of a bifunctional catalytic system for preparing low-carbon hydrocarbons from synthesis gas. The catalyst takes an indium-based composite oxide as a main active component, and one or more than two alkali metals or alkaline earth metals areused as auxiliary agents. The catalyst is prepared by dissolving, constant-temperature precipitation, filtering, washing, drying, calcining and the like. The catalyst is mixed with a certain amount ofa molecular sieve catalyst to be applied to a reaction system for preparing the low-carbon hydrocarbons from the synthesis gas., wherein the reaction temperature is 320-480 DEG c, the reaction pressure is 0.5-8.0 Mpa, the molar ratio of CO: H2 is 1: 0.3-3 , under the gas pressure of 2000-10000 h<-1>, the synthesis gas can be directly converted into C2-C4 hydrocarbons, the selectivity can reach more than 90%, the olefin selectivity can reach more than 75%, and the catalyst can be used in industrial production of synthesis gas conversion.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a modified catalyst for preparing low-carbon hydrocarbons from synthesis gas and its application. Background technique [0002] my country is a developing country, and the clean and efficient utilization of coal, natural gas and biomass has always been an important issue for sustainable development. In principle, the industrialization prospect of direct conversion of coal, natural gas and biomass into chemicals is relatively slim, so it is particularly necessary to select a suitable conversion medium as a platform for coal chemical and natural gas chemical to realize chemical synthesis. In recent years, with the maturity of coal gasification technology, natural gas reforming technology and biomass gasification technology, syngas chemistry is considered to be the most feasible way to replace petroleum to produce oil and bulk chemicals. [00...

Claims

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Application Information

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IPC IPC(8): B01J29/85B01J29/83B01J29/80B01J23/08B01J23/26C07C1/04C07C1/20C07C11/02C07C29/153C07C31/04
CPCY02P20/52
Inventor 苏俊杰谢在库王仰东刘苏周海波刘畅
Owner CHINA PETROLEUM & CHEM CORP
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