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Catalyst for preparing light hydrocarbons from synthetic gas and application of the catalyst

A catalyst and synthesis gas technology, applied in molecular sieve catalysts, physical/chemical process catalysts, and hydrocarbon production from oxygen-containing organic compounds, etc., can solve problems such as high single-pass conversion rate, low CO conversion rate, and high olefin ratio

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 catalyst for preparing low-carbon hydrocarbons from syngas, which is used to produce low-carbon hydrocarbons from syngas When reacting 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 for preparing light hydrocarbons from synthetic gas and application of the catalyst
  • Catalyst for preparing light hydrocarbons from synthetic gas and application of the catalyst
  • Catalyst for preparing light hydrocarbons from synthetic gas and application of the catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] InZr 0.5 Catalyst is prepared as follows:

[0033] 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. After the dropwise addition, keep stirring for 3 hours, filter the obtained precipitate and wash it with water until neutral, dry it in an oven at 80°C for 12 hours, and then calcinate at 500°C 1 hour.

[0034] 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.

[0035] Catalyst evaluations were performed on a fixed bed microreactor. The reactor adopts a stainless steel reactor lined with a quartz tube. The cata...

Embodiment 2

[0037] InZr 2 Catalyst is prepared as follows:

[0038] 12.73g In(NO 3 ) 3 4.5H 2 O and 28.65g Zr(NO 3 ) 4 ·5H 2 Dissolve O in 200ml of water, stir well, and continue stirring for 10 minutes after all dissolve. 19.2g (NH 4 ) 2 CO 3 Dissolve in 200ml of water and stir until completely dissolved. The two solutions were dropped into 20ml of water at the same time, and the ratio of dropping speed was 1:1. Keep stirring while dropping, and keep the solution temperature at 70°C. After the dropwise addition, keep stirring for 3 hours, filter the obtained precipitate and wash it with water until neutral, dry it in an oven at 80°C for 12 hours, and then calcinate at 500°C 1 hour.

[0039] 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.

[0040] Catalyst evaluations were performed on a fixed bed microreactor. The reactor adopts a stainless steel reactor lined with a quartz tube. T...

Embodiment 3

[0042] InCr 0.5 Catalyst is prepared as follows:

[0043] 25.46g In(NO 3 ) 3 4.5H 2 O and 21.49g Cr(NO 3 ) 3 9H 2 Dissolve O in 200ml of water, stir well, and continue stirring for 10 minutes after all dissolve. 17.28g (NH 4 ) 2 CO 3 Dissolve in 180ml of water and stir until completely dissolved. Drop the two solutions into 20ml of water at the same time, the dropping speed ratio is 10:9, keep stirring while dropping, and keep the solution temperature at 70°C, keep stirring for 3 hours after the dropping, filter the obtained precipitate and wash with water To neutrality, dry in an oven at 80°C for 12 hours, and then calcined at 500°C for 1 hour.

[0044] After the calcined catalyst is crushed, it is pressed into tablets to 20-40 mesh and mixed evenly with SAPO34 of the same size and quality.

[0045] Catalyst evaluations were performed on a fixed bed microreactor. The reactor adopts a stainless steel reactor lined with a quartz tube. The catalyst is first reduced...

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Abstract

The invention belongs to the technical field of chemistry and chemical engineering and relates to a preparation method and an application of a catalyst used for preparing light hydrocarbons from synthetic gas. The catalyst has a dual-functional catalytic system, wherein indium oxide is a main active component and one or more than two metal oxide components are employed as additives. The preparation method includes the processes of dissolution, constant temperature precipitation, filtration and washing, drying, calcination and the like. The catalyst then is blended with a certain amount of a molecular sieve catalyst for application to a reaction system of preparing light hydrocarbons from synthetic gas. When reaction temperature is 320-480 DEG C, reaction pressure is 0.5-8.0 MPa, CO:H2 (molar ratio) is 1:0.3-3 and GHSV is 2000-10000 / h, the synthetic gas can be directly converted into C2-C4 hydrocarbons, selectivity reaching more than 85% and alkene / alkane ratio reaching more than 4.5. The catalyst can be used for industrial production of synthetic gas conversion.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a 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. [0003] Low-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C07C1/20C07C9/02C07C11/02
Inventor 苏俊杰谢在库王仰东刘苏周海波刘畅
Owner CHINA PETROLEUM & CHEM CORP