Unlock instant, AI-driven research and patent intelligence for your innovation.

Core-shell structure multifunctional catalyst system and application

A core-shell structure and catalyst technology, applied in the field of catalysts, synthesis gas conversion to produce aromatics and co-production of light hydrocarbons, can solve the problems of low aromatics selectivity of target products, high investment in industrial application, low CO conversion rate, etc., and achieve optimized aromatics products. Distribution, reduce equipment investment costs, and the effect of good technical results

Active Publication Date: 2022-07-08
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problems to be solved by the present invention are inconvenient catalyst loading, high investment in industrial application, low conversion rate of CO, low selectivity of target product aromatics, low proportion of light aromatics in aromatics products, complex catalyst preparation, etc. The problem is to provide a new catalyst system, which has the advantages of simple catalyst preparation, convenient loading, high conversion rate of CO, high selectivity of target aromatics, and light hydrocarbons in aromatics when the system is used for syngas conversion to produce aromatics and co-produces light hydrocarbons. High proportion of high quality aromatics, low equipment investment cost and other advantages

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
  • Core-shell structure multifunctional catalyst system and application
  • Core-shell structure multifunctional catalyst system and application
  • Core-shell structure multifunctional catalyst system and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] According to Zn / Cr molar ratio of 1:3, Zn-Cr oxide was prepared by sol-gel method, denoted as ZnCr 3 O x ; According to shell Si / Al=12, core / shell mass ratio 1 / 1, be equipped with the mother liquor containing silica sol, sodium metaaluminate, tetrapropyl ammonium bromide, and put into the mother liquor a certain amount of ZnCr 3 O x , the obtained mixed system is hydrothermally treated to obtain the core of ZnCr 3 O x , a core-shell molecular sieve whose shell is HZSM-5 (Si / Al=12), denoted as ZnCr 3 O x / HZ5(12); ZnCr 3 O x / HZ5(12) was granulated and crushed to obtain catalyst particles of 20-40 meshes, and 1.5 g of catalyst particles were weighed and loaded into the reactor. At a reaction temperature of 395°C and a pressure of 2.0MPa, the raw material gas H 2 / CO ratio 1.0, airspeed 2000h -1 The catalyst evaluation was carried out under the conditions. Before the reaction, the catalyst was heated at 395 °C with H 2 Pretreatment for 2h.

[0047] raw gas H ...

Embodiment 2

[0049] According to the Zn / Cr molar ratio of 1:3, Zn-Cr oxide was prepared by co-precipitation method, denoted as ZnCr 3 O x ; According to shell Si / Al=12, core / shell mass ratio 1 / 1, be equipped with the mother liquor containing silica sol, sodium metaaluminate, tetrabutylammonium bromide, and put into the mother liquor a certain amount of ZnCr 3 O x , the obtained mixed system is hydrothermally treated to obtain the core of ZnCr 3 O x , a core-shell molecular sieve whose shell is HZSM-11 (Si / Al=12), denoted as ZnCr 3 O x / HZ11(12); ZnCr 3 O x / HZ11(12) was granulated and crushed to obtain catalyst particles of 20-40 meshes, and 1.5 g of catalyst particles were weighed and loaded into the reactor. At a reaction temperature of 395°C and a pressure of 2.0MPa, the raw material gas H 2 / CO ratio 1.0, airspeed 2000h -1 The catalyst evaluation was carried out under the conditions. Before the reaction, the catalyst was heated at 395 °C with H 2Pretreatment for 2h. The res...

Embodiment 3

[0051] According to the Zn / Cr molar ratio of 1:3, Zn-Cr oxide was prepared by high-temperature sintering method, which is denoted as ZnCr 3 O x ; According to shell Si / Al=30, core / shell mass ratio 1 / 1, be equipped with the mother liquor containing silica sol, sodium metaaluminate, tetrapropyl ammonium bromide, and put into the mother liquor a certain amount of ZnCr 3 O x , the obtained mixed system is hydrothermally treated to obtain the core of ZnCr 3 O x , a core-shell molecular sieve whose shell is HZSM-5 (Si / Al=30), denoted as ZnCr 3 O x / HZ5(30); ZnCr 3 O x / HZ5 (30) was granulated and crushed to obtain catalyst particles of 20-40 meshes, and 1.5 g of catalyst particles were weighed and loaded into the reactor. At a reaction temperature of 395°C and a pressure of 2.0MPa, the raw material gas H 2 / CO ratio 1.0, airspeed 2000h -1 The catalyst evaluation was carried out under the conditions. Before the reaction, the catalyst was heated at 395 °C with H 2 Pretreatm...

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

No PUM Login to View More

Abstract

The invention relates to a process for converting synthesis gas to produce aromatic hydrocarbons and co-producing light hydrocarbons and a core-shell structure multifunctional catalyst used. The catalyst system has catalytic activity for synthesis gas conversion and aromatic hydrocarbon / light hydrocarbon synthesis. The synthesis gas conversion activity is provided by metal oxides, and the aromatic hydrocarbon / light hydrocarbon synthesis activity is provided by molecular sieves. The core layer of the core-shell structure catalyst is a metal oxide, and its active component is preferably one or at least one selected from Cr, Zr, Mn, Ce, La, Ti, In, Ga, and Zn; the shell layer is selected from MFI or One or more of the molecular sieves with MEL structure, whose silicon-aluminum ratio ranges from 12 to ∞. The invention provides a non-Fischer-Tropsch route and a one-step new route for realizing the direct conversion of synthesis gas to aromatic hydrocarbons and co-producing light hydrocarbons, which can be used for the industrial application of synthesis gas to olefin aromatic hydrocarbons.

Description

technical field [0001] The invention relates to a process and a catalyst for converting synthesis gas to produce aromatic hydrocarbons and co-producing light hydrocarbons, in particular to a process for converting synthesis gas to produce aromatic hydrocarbons and co-producing light hydrocarbons by adopting a core-shell structure multifunctional catalyst system. Background technique [0002] Hydrocarbons are an important class of basic chemicals. As energy components and monomers of synthetic materials, they play an indispensable role in the national economy and people's lives. For a long time, hydrocarbon products were mainly derived from petroleum refining. With the increasing shortage of petroleum resources, exploring new paths for hydrocarbon production has become the only way to alleviate the petrochemical energy crisis, realize the sustainable development of the chemical industry, and promote my country's economic development and energy strategic security. my country'...

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 Patents(China)
IPC IPC(8): B01J29/48B01J29/80C07C1/04C07C15/02C07C9/02C07C11/02
CPCY02P20/52
Inventor 刘畅刘苏周海波苏俊杰焦文千王仰东
Owner CHINA PETROLEUM & CHEM CORP