Catalyst for preparing arene from synthesis gas through one-step conversion and preparation method of catalyst

A technology for synthesis gas and catalyst, which is applied to the catalyst for one-step conversion of synthesis gas to aromatic hydrocarbons and the field of preparation thereof, can solve the problems of complex reactor process, difficulty in maintaining life, lack of competitiveness, etc., and achieves improved conversion efficiency, low cost, and stability. good effect

Active Publication Date: 2016-12-14
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Aromatics can be obtained on these catalysts, but often not more than 45% (such as Pd-modified Fe-HZSM-5 catalysts), and it is difficult to maintain a good life
Some studies report that methanol synthesis and methanol-to-aromatics dual-stage catalysts are used in synthesis gas to aromatics, such as Chinese patents CN 200710061506.3, CN200810079957.4, CN 200980149207.2, etc. These research reports can obtain certain aromatics selectivity, but the two-stage reactor process Complexity, high cost, and insufficient competitiveness; and from the reported results, the selectivity of heavy aromatics accounts for more than 50% of the proportion of aromatics, and heavy aromatics need subsequent treatment to obtain basic chemical raw materials of benzene, toluene, and xylene

Method used

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  • Catalyst for preparing arene from synthesis gas through one-step conversion and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 1.34g KNO 3 , add 60ml of deionized water and stir for 5h to form a solution, then weigh 5.0g of hierarchical zeolite molecular sieve H-ZSM-11 and add it to the above solution, and stir at room temperature for 6h. After suction filtration and washing, the resulting filter cake was moved to a vacuum drying oven and dried at 70° C. for 24 hours. The dried solid powder was mixed with 6.25g BaZrO 3 The perovskite was mixed, and after being ground, the sample was moved to a muffle furnace, and the temperature was raised to 500°C at a rate of 2°C / min for 10 hours of roasting. The calcined samples were placed in a tube furnace, fed with hydrogen gas at a rate of 2 °C / min to 400 °C for reduction, and the reduction time was 10 h. The reduced solid sample was pressed into tablets to obtain the catalyst.

[0034] The catalytic reaction is carried out in a fixed-bed high-pressure microreactor, and the H in the syngas 2 The volume ratio to CO is 2, the reaction pressure is...

Embodiment 2

[0036] Weigh 2.29g Mg(NO 3 ) 2, add 50ml of deionized water and stir for 5h to form a solution, then weigh 5.0g of hierarchical zeolite molecular sieve H-ZSM-5 and add to the above solution, and stir at room temperature for 6h. After suction filtration and washing, the resulting filter cake was moved to a vacuum drying oven and dried at 70° C. for 24 hours. The dried solid powder was mixed with 5.0g BaZrO 3 The perovskite was mixed, and after being ground, the sample was moved to a muffle furnace, and the temperature was raised to 500°C at a rate of 2°C / min for 10 hours of roasting. The calcined samples were placed in a tube furnace, fed with hydrogen gas at a rate of 2 °C / min to 450 °C for reduction, and the reduction time was 10 h. The reduced solid sample was pressed into tablets to obtain the catalyst.

[0037] The catalytic reaction was carried out in a fixed-bed high-pressure microreactor. The reaction conditions and product analysis were the same as in Example 1. Th...

Embodiment 3

[0039] Weigh 0.51g Mn(CH 3 COO) 2 , add 50ml of absolute ethanol and stir for 5h to form a solution, then weigh 5.0g of hierarchical zeolite molecular sieve H-X and add it to the above solution, and stir at room temperature for 6h. After suction filtration and washing, the resulting filter cake was moved to a vacuum drying oven and dried at 70° C. for 24 hours. The dried solid powder was mixed with 5.0g CaZrO 3 The perovskite was mixed, and after being ground, the sample was moved to a muffle furnace, and the temperature was raised to 500°C at a rate of 2°C / min for 10 hours of roasting. The calcined samples were placed in a tube furnace, fed with hydrogen gas at a rate of 2 °C / min to 450 °C for reduction, and the reduction time was 10 h. The reduced solid sample was pressed into tablets to obtain the catalyst.

[0040] The catalytic reaction was carried out in a fixed-bed high-pressure microreactor. The reaction conditions and product analysis were the same as in Example 1...

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Abstract

The invention relates to catalysts, in particular to a catalyst for preparing arene from synthesis gas through one-step conversion and a preparation method of the catalyst. The catalyst is prepared from, by mass, 30%-70% of zirconium-containing perovskite, 30%-60% of multistage porous zeolite molecular sieve and 0.1%-10% of oxide additive. The preparation method comprises the steps that 1, a salt compound of at least one of IA, IIA, VB, VIB, VIIB, IIB and IVA family elements and rare earth elements is weighed according to the components of the catalyst and added into water or alcohol to be prepared into a solution A; the multistage porous zeolite molecular sieve is weighed and added into the solution A, suction filtration, washing and filter cake drying are carried out to obtain solid powder, then the solid power and the zirconium-containing perovskite are mixed, ground and calcined, hydrogen or mixed gas of hydrogen and inert gases is introduced, heating is carried out for reduction, the reduced solid sample is tablet molded, and the catalyst is prepared.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for one-step conversion of synthesis gas to aromatics and a preparation method thereof. Background technique [0002] Syngas conversion is CO hydrogenation reaction, which can produce fuel products such as gasoline, naphtha, diesel, and aviation fuel, as well as important chemical raw materials such as low-carbon olefins and aromatics. At present, the industrial production of fuel oil based on coal or natural gas has been realized at home and abroad. For example, South African Sasol Company, Anglo-Dutch Shell Company, Synfuels, and Yankuang Group all have coal-to-oil technology based on coal or natural gas. However, the technology for producing aromatics from syngas has not yet been industrialized. The main technical difficulties lie in the low selectivity of aromatics and poor catalyst stability. [0003] The research focus of one-step conversion of synthesis gas to aromatics mainly foc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/08B01J29/70B01J29/85B01J35/10C07C1/04C07C15/04C07C15/06C07C15/08
CPCY02P20/52B01J29/405B01J29/087B01J29/7049B01J29/7057B01J29/7088B01J29/85B01J35/10C07C1/04C07C1/043C07C1/0445C07C15/04C07C15/06C07C15/08
Inventor 王野康金灿成康张庆红周伟
Owner XIAMEN UNIV
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