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Catalyst for high-selectivity preparation of light aromatic hydrocarbon by using synthesis gas and preparation method thereof

A high-selectivity, light-weight aromatic hydrocarbon technology, applied in the direction of carbon compound catalysts, preparation of liquid hydrocarbon mixtures, catalysts, etc., can solve the problems of difficult life maintenance and low selectivity, and achieve low cost, simple preparation method, and high acid concentration. weakened effect

Active Publication Date: 2017-03-29
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned catalysts can obtain aromatics from syngas in one step, the selectivity of aromatics is often not more than 45%, and it is difficult to maintain a good life
In addition, the selectivity of light aromatics benzene, toluene, and xylene in the reaction product is low

Method used

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  • Catalyst for high-selectivity preparation of light aromatic hydrocarbon by using synthesis gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 12.5g Zr(NO 3 ) 4 ·5H 2 Add O to 100ml ethanol, stir at 50°C for 2h; add 0.2g polyvinyl alcohol (average molecular weight 300), continue stirring for 3h; add 0.055g MgCl 2 , continue to stir at 50°C for 2h; continue to add 10wt% sodium hydroxide solution, adjust the pH of the system to 9.5, heat up to 70°C and stir for 5h under reflux; after suction filtration and washing, the obtained sample is moved to a vacuum drying oven Dry at 100°C for 12h; move the dried sample to a muffle furnace and bake at 500°C for 6h, the product obtained is ZrO 2 - MgO (1 / 0.02).

[0040] Weigh 5.0g of zeolite molecular sieve Hbeta into a round bottom flask containing 50ml of n-heptane, raise the temperature to 80°C and stir for 2h; add 0.5g of butyl orthosilicate, continue to stir and reflux for 4h; then transfer the mixture to a rotary evaporator Heating in vacuum at 70°C for 3h; moving the dried sample in a muffle furnace to 450°C for 5h at a rate of 2°C / min; weighing 0.25g of s...

Embodiment 2

[0044] Weigh 12.5g Zr(NO 3 ) 4 ·5H 2 Add O to 100ml ethanol, stir at 50°C for 2h; add 0.2g polyvinyl alcohol (average molecular weight 300), continue stirring for 3h; add 0.14g LaCl 3 , continue stirring at 50°C for 2h; add 10wt% sodium hydroxide solution, adjust the pH value of the system to 9.5, heat up to 70°C and stir for 5h under reflux; after suction filtration and washing, the obtained sample is moved to a vacuum drying oven for Dry at 100°C for 12h; move the dried sample to a muffle furnace and bake at 500°C for 6h, and the product obtained is ZrO 2 -La 2 o 3 (1 / 0.02).

[0045] Weigh 5.0g of zeolite molecular sieve HZSM-5 into a round bottom flask containing 50ml of n-heptane, raise the temperature to 80°C and stir for 2h; add 0.35g of butyl orthosilicate, continue to stir and reflux for 4h; then transfer the mixture to a rotary In the evaporator, heat in vacuum at 70°C for 3h; move the sample after vacuum heating and drying to a muffle furnace and heat up to 450...

Embodiment 3

[0049] Weigh 12.5g Zr(NO 3 ) 4 ·5H 2 Add O to 100ml ethanol, stir at 50°C for 2h; add 0.2g polyvinyl alcohol (average molecular weight 300), continue stirring for 3h; add 0.073g MnCl 2 , continue stirring at 50°C for 2h; add 10wt% sodium hydroxide solution, adjust the pH value of the system to 9.5, heat up to 70°C and stir for 5h under reflux; after suction filtration and washing, the obtained sample is moved to a vacuum drying oven for Dry at 100°C for 12h; move the dried sample to a muffle furnace and bake at 500°C for 6h, and the product obtained is ZrO 2 -MnO (1 / 0.02).

[0050] Weigh 5.0g of zeolite molecular sieve HZSM-34 into a round bottom flask containing 50ml of n-heptane, raise the temperature to 80°C and stir for 2h; add 0.35g of butyl orthosilicate, continue to stir and reflux for 4h; then transfer the mixture to a rotary In the evaporator, heat in vacuum at 70°C for 3h; move the sample after vacuum heating and drying to a muffle furnace and heat up to 450°C fo...

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Abstract

The invention provides a catalyst for high-selectivity preparation of light aromatic hydrocarbon by using synthesis gas and a preparation method thereof and belongs to the field of catalysts. The catalyst is prepared from, by mass, 20%-60% of modified zeolite molecular sieve and 40%-80% of zirconium-containing composite oxide. The preparation method comprises the steps that the zirconium-containing composite oxide is added to a solvent, and ultrasonic dispersion is performed to obtain a solution A; the modified zeolite molecular sieve is added into the solution A; the mixture obtained after ultrasonic dispersion is subjected to suction filtration, and the obtained filter cake after washing is dried; the sample obtained after drying is grinded into powder; the powdery sample is calcinated, and the obtained sample is the catalyst for high-selectivity preparation of the light aromatic hydrocarbon by using synthesis gas. The light aromatic hydrocarbon can be prepared in a high-selectivity mode, and the stability is good. The preparation method of the catalyst for high-selectivity preparation of the light aromatic hydrocarbon by using the synthesis gas is simple and low in cost and has good industrial application prospect.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a catalyst for producing light aromatics from synthesis gas with high selectivity and a preparation method thereof. Background technique [0002] Due to the continuous scarcity of petroleum resources, various non-oil-based resources (such as coal, natural gas, shale gas and biomass, etc.) have been developed in recent years to produce clean liquid fuels and chemicals (such as low-carbon The study of olefins and aromatics, etc.) has aroused widespread interest again. The main challenge of CO hydrogenation reaction lies in the control of selectivity. For example, it is difficult to obtain various middle distillates such as gasoline, diesel, and jet fuel in one step with high selectivity. At present, the industrialization of fuel oil based on coal or natural gas (such as South African Sasol Company, Anglo-Dutch Shell Company, Synoil, Yankuang Group, etc.) all adopts two-step or multi-step ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70B01J29/40B01J29/48B01J29/08B01J29/18B01J29/85C10G2/00C07C15/04C07C15/06C07C15/08C07C15/02C07C1/04
CPCB01J29/088B01J29/185B01J29/405B01J29/48B01J29/7057B01J29/7065B01J29/7088B01J29/85B01J2229/186B01J2229/20C07C1/043C07C2529/08C07C2529/18C07C2529/40C07C2529/48C07C2529/70C07C2529/85C10G2/334C07C15/04C07C15/06C07C15/08C07C15/02Y02P20/52Y02P30/20Y02P30/40
Inventor 康金灿成康周伟何顺师树临张庆红王野
Owner XIAMEN UNIV
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