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Coal tar bimodal pore structure hydrogenation pretreatment catalyst and preparation method thereof

A technology for hydrogenation pretreatment and hydrogenation catalyst, which is applied in the directions of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. Problems such as secondary pollution are generated, and the effects of reducing roasting energy consumption, high proportion of macropores, and improving carrier strength are achieved.

Active Publication Date: 2020-09-01
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is cumbersome in the carrier modification process and will cause secondary pollution
[0011] The macropore diameter of the coal tar bimodal pore structure hydrogenation pretreatment catalyst prepared by the above method is mostly concentrated below 500nm, and the macropore content above 1000nm and above 2000nm is relatively low , cannot avoid the clogging of the smaller pores, and cannot improve the diffusion performance of the catalyst to the greatest extent

Method used

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  • Coal tar bimodal pore structure hydrogenation pretreatment catalyst and preparation method thereof
  • Coal tar bimodal pore structure hydrogenation pretreatment catalyst and preparation method thereof
  • Coal tar bimodal pore structure hydrogenation pretreatment catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of phosphorus-containing pseudoboehmite M 1 and M 2 ,M 1 Contains 1.38% of its total weight of P, M 2 Contains 1.69% of P in its total weight. Determination of specific surface area and pore volume of phosphorus-containing pseudo-boehmite by nitrogen adsorption method, M 1 The specific surface area is 184m 2 / g, the pore volume is 2.1mL / g, and the most probable pore diameter is 40.8nm; M 2 The specific surface area is 420m 2 / g, the pore volume is 1.3mL / g, and the most probable pore diameter is 18.6nm. Weigh the above-mentioned phosphorus-containing pseudo-boehmite M 1 50g (dry basis), phosphorus-containing pseudo-boehmite M 2 50g (dry basis), add 3g of asparagus powder, dissolve 1.8g of boric acid and 0.8g of polyoxyethylene ether in 110g of deionized water, add to the aforementioned materials, knead and extrude into a cylinder with a diameter of 2.5mm on a single-screw extruder shape, dried at 105°C for 4 hours, and then calcined at 800°C for 4 ...

Embodiment 2

[0044] Preparation of phosphorus-containing pseudoboehmite M 1 and M 2 ,M 1 Contains 0.87% of its total weight of P, M 2 Contains 0.96% of P in its total weight. Determination of specific surface area and pore volume of phosphorus-containing pseudo-boehmite by nitrogen adsorption method, M 1 The specific surface area is 178m 2 / g, the pore volume is 2.2mL / g, and the most probable pore diameter is 34.6nm; M 2 The specific surface area is 400m 2 / g, the pore volume is 1.3mL / g, and the most probable pore diameter is 17.0nm.

[0045] Weigh the above-mentioned phosphorus-containing pseudo-boehmite M 1 60g (dry basis), phosphorus-containing pseudo-boehmite M 2 40g (dry basis), add 3g of safflower powder and 2.0g of boron oxide, dissolve 1.0g of polyoxyethylene ether in 107g of deionized water, add to the aforementioned materials, knead and extrude on a single-screw extruder into diameter 3.0mm Four-leaf clover shape, dried at 120°C for 3 hours, and then calcined at 600°C fo...

Embodiment 3

[0047] Preparation of phosphorus-containing pseudoboehmite M 1 and M 2 ,M 1 Contains 1.78% of its total weight of P, M 2 Contains 0.54% of P in its total weight. Determination of specific surface area and pore volume of phosphorus-containing pseudo-boehmite by nitrogen adsorption method, M 1 The specific surface area is 230m 2 / g, the pore volume is 3.0mL / g, and the most probable pore diameter is 21.5nm; M 2 The specific surface area is 410m 2 / g, the pore volume is 1.4mL / g, and the most probable pore diameter is 18.0nm.

[0048] Weigh the above-mentioned phosphorus-containing pseudo-boehmite M 1 70g (dry basis), phosphorus-containing pseudo-boehmite M 2 30g (dry basis), add 3g of asparagus powder, dissolve 1.6g of boric acid and 1.4g of polyoxyethylene ether in 110g of deionized water, add to the aforementioned materials, knead and extrude into a clover with a diameter of 3.0mm on a single-screw extruder shape, dried at 110°C for 4 hours, and then calcined at 750°C...

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Abstract

The invention discloses a coal tar bimodal pore structure hydrogenation pretreatment catalyst and a preparation method thereof. The pore volume of a coal tar bimodal pore structure hydrogenation pretreatment catalyst aluminum oxide carrier is 0.8-1.5 mL / g, the specific surface area is 120-350m < 2 > / g, the most probable pore size of mesopores is 15-30nm, the most probable pore size of macropores is 2000-4000nm, and the pore volume of macropores with the pore size of 2400nm or above accounts for 5-25% of the total pore volume. Aluminum oxide is used as a carrier, VIB and VIII metal elements areused as active components, a phosphorus element is used as an auxiliary agent, the weight content of the active components in the hydrogenation pretreatment catalyst is 0.4%-10% by metal, and the weight content of the auxiliary agent phosphorus in the hydrogenation pretreatment catalyst is 0.1%-10% by element. The coal tar bimodal pore structure hydrogenation pretreatment catalyst provided by theinvention has the advantages of large pore volume, large pore diameter, excellent diffusivity, and high demetallization and hydrogenolysis asphaltene activity.

Description

technical field [0001] The invention relates to a hydrogenation pretreatment catalyst and a preparation method thereof, in particular to a coal tar bimodal pore structure hydrogenation pretreatment catalyst and a preparation method thereof. Background technique [0002] Coal tar is a valuable chemical raw material obtained in the process of coal pyrolysis and gasification. With the rapid development of low-rank coal pyrolysis technology, the production of medium and low temperature coal tar has increased significantly. Medium and low temperature coal tar contains more alkanes, cycloalkanes and less condensed ring aromatics, and is suitable for the production of clean fuel oil and high value-added chemicals through hydrogenation. [0003] Residual oil is the most difficult raw material to process among petroleum-based heavy oils. It contains a large amount of colloids and asphaltenes. This part of the substance has a large molecular weight, complex structure, and difficult d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19B01J27/188B01J35/10C10G45/04
CPCB01J27/19B01J27/188C10G45/04B01J35/635B01J35/657B01J35/69B01J35/647B01J35/615
Inventor 马博文吴艳李文博陈贵锋黄澎赵鹏文芳李兰廷
Owner CCTEG CHINA COAL RES INST
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