Silicon carbide/silicon nitride carrier, preparation method thereof, Fischer-Tropsch synthesis catalyst, and preparation method and application of catalyst

A technology of Fischer-Tropsch synthesis and silicon nitride, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as high Fischer-Tropsch synthesis activity, and achieve easy high dispersion and high loading capacity , easy to obtain materials, simple ingredients

Active Publication Date: 2019-08-20
CHNA ENERGY INVESTMENT CORP LTD +1
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to, aiming at the problems existing in the performance of existing iron-based Fischer-Tropsch synthesis catalysts, provide a silicon carbide / silicon nitride carrier and its preparation method, Fischer-Tropsch synthesis catalyst and its preparation method and application, by selecting This silicon carbide / silicon nitride support can make the obtained Fischer-Tropsch synthesis catalyst have high temperature stability, good attrition resistance and high Fischer-Tropsch synthesis activity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silicon carbide/silicon nitride carrier, preparation method thereof, Fischer-Tropsch synthesis catalyst, and preparation method and application of catalyst
  • Silicon carbide/silicon nitride carrier, preparation method thereof, Fischer-Tropsch synthesis catalyst, and preparation method and application of catalyst
  • Silicon carbide/silicon nitride carrier, preparation method thereof, Fischer-Tropsch synthesis catalyst, and preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Preparation of porous silicon carbide / silicon nitride supports:

[0094] (1) take silicon nitride powder as 55wt%, silicon carbide powder as 25wt%, aluminum oxide as 10wt% and phenolic resin as 10wt% to carry out batching, dry mix, dry, make mixed powder; The consumption of above raw material is The total weight of raw materials in step (1) is 100wt%. (2) to a temperature of 80°C made of liquid paraffin and cyclohexane (the mass of liquid paraffin and cyclohexane is 30 times that of the mixed powder, and the mass ratio of liquid paraffin to cyclohexane is 1:1) and Tween80 ( The ratio of the amount of Tween80 to the total mass of liquid paraffin and cyclohexane is 1:5), add the mixed powder into the homogeneous mixture, stir and mix evenly to obtain the sol solution, and then perform aging treatment on it at 70°C. After 48 hours, hydrogel balls were obtained. (3) The hydrogel balls were washed and filtered three times with absolute ethanol, and then dried to obtain xer...

Embodiment 2

[0100] The porous silicon carbide / silicon nitride carrier was prepared according to the method described in Example 1. The resulting support contained 61 wt% SiN, 28 wt% SiC and 11 wt% Al 2 o 3 ; And the structure, pore size distribution and average pore size of the carrier are the same as in Example 1.

[0101] Preparation of Fischer-Tropsch synthesis catalyst:

[0102] 1) 3.7g of ferric nitrate nonahydrate, 0.1g of potassium carbonate and 0.8g of zinc nitrate were ultrasonically dissolved in 5g of deionized water to obtain impregnation solution A. 2) A ceramic evaporating dish containing 1 g of the spherical porous silicon carbide / silicon nitride carrier prepared above was placed in an ultrasonicator, and the immersion solution A was added dropwise into the ceramic evaporating dish. The impregnating liquid A is continuously stirred with a medicine spoon during the dropping process, so that the impregnating liquid is uniformly dispersed on the spherical porous silicon carb...

Embodiment 3

[0106] The porous silicon carbide / silicon nitride carrier was prepared according to the method described in Example 1. The resulting support contained 61 wt% SiN, 28 wt% SiC and 11 wt% Al 2 o 3 ; And the structure, pore size distribution and average pore size of the carrier are the same as in Example 1.

[0107] Preparation of Fischer-Tropsch synthesis catalyst:

[0108] 1) 10.1 g of ferric nitrate nonahydrate, 0.15 g of potassium carbonate, 0.6 g of zinc nitrate and 0.5 g of calcium nitrate were ultrasonically dissolved in 5 g of deionized water to obtain impregnation solution A. 2) A ceramic evaporating dish containing 1 g of the spherical porous silicon carbide / silicon nitride carrier prepared above is placed in an ultrasonicator, and the impregnating solution A is added dropwise into the ceramic evaporating dish. During the dropwise addition of impregnation solution A, stir continuously with a medicine spoon, so that the impregnation solution is evenly dispersed on the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
kinematic viscosityaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of Fischer-Tropsch synthesis catalysts, and especially relates to a silicon carbide/silicon nitride carrier, a preparation method thereof, a Fischer-Tropsch synthesis catalyst, and a preparation method and an application of the catalyst. 100 wt% of the silicon carbide/silicon nitride carrier comprises 55-72 wt% of silicon nitride, 25-40 wt% of silicon carbide and 1-12 wt% of alumina; and the Fischer-Tropsch synthesis catalyst includes 20-60 wt% of an active component, 0-20 wt% of a cocatalyst and 30-50 wt% of the silicon carbide/silicon nitride carrier. The silicon carbide/silicon nitride carrier is selected to make the Fischer-Tropsch synthesis catalyst have the advantages of good high temperature stability, good arbrasion resistance and high Fischer-Tropsch synthesis activity.

Description

technical field [0001] The invention belongs to the technical field of Fischer-Tropsch synthesis catalysts, and in particular relates to a silicon carbide / silicon nitride carrier and a preparation method thereof, a Fischer-Tropsch synthesis catalyst and a preparation method and application thereof. Background technique [0002] With the gradual depletion of petroleum resources and the increasing demand for energy, the production of fuels or chemicals through alternative or sustainable processes has attracted more and more attention from scientists and industrialists in various countries. Fischer-Tropsch synthesis is based on synthesis gas (mainly containing CO and H 2 The mixture) is a chemical reaction process of synthesizing hydrocarbons (including fuels and chemicals, etc.) with catalysts and appropriate conditions. In this field, coal, natural gas, biomass and other carbon-containing resources can obtain synthesis gas through gasification or reforming reactions, and the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C10G2/00
CPCB01J27/24B01J35/10B01J35/1095B01J35/1047B01J35/1019C10G2/33
Inventor 江永军金政伟庄壮张安贵王亮苏慧雍晓静
Owner CHNA ENERGY INVESTMENT CORP LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap