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Catalyst for hydrogenation conversion of Fischer-Tropsch synthetic wax and preparation method and application thereof

A Fischer-Tropsch synthetic wax and hydroconversion technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of easy secondary cracking, gasoline octane The problem of low value and high freezing point of diesel oil can reduce the selectivity.

Active Publication Date: 2021-02-09
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The Fischer-Tropsch wax hydrocracking catalysts studied above are mainly fixed-bed catalysts. However, low-carbon hydrocarbons are prone to secondary cracking in the fixed-bed catalysts, resulting in high cracking gas yields, catalyst deactivation, and Low octane number of gasoline, high freezing point of diesel oil and other disadvantages reduce the overall economics of coal indirect liquefaction technology

Method used

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  • Catalyst for hydrogenation conversion of Fischer-Tropsch synthetic wax and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 714g of Type A Al 2 o 3 , mixed with water for beating and stirred rapidly for 4 hours, then added 150g of Y molecular sieve, adjusted the pH to 9 with ammonia water, added 272.55g of nickel nitrate pentahydrate after stirring for 2 hours, continued to stir for 2 hours and then stood still for 24 hours to obtain a mixture.

[0040] The mixture was placed in a closed reactor for hydrothermal treatment at 105°C and 1.4MPa, with a stirring rate of 300 rpm; after the hydrothermal treatment was completed, it was cooled, and after cooling, 50 g of SAPO-11 molecular sieves were added, stirred for 1 hour, filtered and washed, First dry at 70°C for 4 hours, then dry at 120°C for 12 hours, and then crush it into powder; add 1% scallop powder and dilute nitric acid diluted with concentrated nitric acid and water in a ratio of 1:70 to the powder, and then extrude. Dry at 80°C for 12h and then at 130°C for 6h, then calcinate at 500°C for 4h at a heating rate of 1.5°C / min to o...

Embodiment 2

[0043] Weigh 714g of Type A Al 2 o 3 , mixed with water for beating and stirred rapidly for 4 hours, then added 150g of Y molecular sieve, added 50g of SAPO-11 molecular sieve, and the stirring rate was 300 rpm; after stirring for 1 hour, filtered and washed, first dried at 70°C for 4h and then heated at 120°C Dry it under high temperature for 12 hours, and then crush it into powder; add 1% scallop powder and dilute nitric acid diluted with concentrated nitric acid and water according to the ratio of 1:70 to the powder, then extrude, and first dry at 80°C for 12h, and then at 130°C °C for 6 h, then calcined at 500 °C for 4 h at a heating rate of 1.5 °C / min to obtain the catalyst precursor.

[0044] Use the equal volume impregnation method to configure a solution containing 330g ammonium metatungstate and 272.55g nickel nitrate pentahydrate for impregnation, and let it stand for 16 hours, then dry it at 80°C for 4 hours, then dry it at 135°C for 12 hours, and then dry it at 60...

Embodiment 3

[0046] Under the same preparation conditions as in Example 1, 50 g of ZSM-22 molecular sieves were added after hydrothermal treatment and cooling to obtain catalyst Cat-3.

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Abstract

The invention provides a catalyst for hydrogenation conversion of Fischer-Tropsch synthetic wax and a preparation method and application thereof. The catalyst comprises the following components: Ni, Whydrogenation metal, a Y-type molecular sieve, an isomerization molecular sieve and aluminum oxide; the preparation method of the catalyst comprises the following steps: firstly, mixing and pulping aluminum oxide and water, and then sequentially adding a USY molecular sieve and a Ni metal compound to form a mixture; secondly, putting the mixture into a closed reaction kettle for dynamic hydrothermal treatment; thirdly, after treatment, adding an isomerization molecular sieve, fully stirring, filtering, drying, adding dilute nitric acid, performing extrusion molding, and roasting; and finally,impregnating the W metallide by adopting an equivalent-volume impregnation method, drying and roasting to finally obtain the hydrocracking catalyst. The hydrocracking catalyst prepared by the methodprovided by the invention has appropriate acid properties, pore properties and metal dispersibility, can effectively reduce the secondary cracking performance in the hydrocracking process of Fischer-Tropsch synthetic wax, and improves the yield and product properties of light fuel oil.

Description

technical field [0001] The invention relates to the technical field of hydrocracking of low-temperature Fischer-Tropsch synthetic wax, in particular to a catalyst for hydroconversion of Fischer-Tropsch synthetic wax, its preparation method and application. Background technique [0002] my country's energy structure is characterized by rich coal content and limited oil and natural gas resources. Therefore, coal has become one of the main energy sources used in my country. However, in the process of insufficient combustion of coal, it is easy to produce carbon monoxide and black smoke, causing pollution to the ecological environment. Accelerating the development of coal clean development and utilization technology has become one of the important ways to alleviate my country's energy security environment and solve the increasingly prominent domestic ecological and environmental problems. Based on the technical requirements of cleanliness, high efficiency, and scale in the proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J23/888B01J35/10B01J37/10B01J37/00B01J37/08B01J37/02C10G47/16
CPCB01J29/80B01J23/888B01J23/002B01J37/10B01J37/0018B01J37/082B01J37/0201B01J37/088C10G47/16B01J29/084B01J29/85B01J29/7042B01J29/40B01J2523/00C10G2300/1022B01J35/651B01J35/635B01J35/633B01J35/647B01J35/615B01J2523/31B01J2523/69B01J2523/847
Inventor 韩磊黄传峰刘树伟程秋香张健张小琴刘晓花
Owner SHAANXI YANCHANG PETROLEUM GRP
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