Platinum-based composite catalyst and method for preparing propylene and synthesis gas through propane oxidative dehydrogenation with CO2 in presence of hydrogen

A composite catalyst, carbon dioxide technology, used in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of rapid deactivation, low raw material processing capacity, and low catalyst activity. and other problems, to achieve the effect of promoting effective activation, excellent redox performance, and improving the conversion rate of propane

Active Publication Date: 2021-11-02
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, carbon dioxide oxidizes propane dehydrogenation (CO 2 -ODP) can overcome the problems of high energy consumption and low raw material processing capacity of PDH on the one hand, and at the same time realize the greenhouse gas CO 2 On the other hand, compared with the dehydrogenation of propane by molecular oxygen oxidation, there is no problem of over-oxidation of propane, and it is expected to become an energy-saving and environmentally friendly green synthesis process. However, the existing catalysts generally have low activity, loss of Live fast and other problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take Al 2 o 3 As a carrier, Pt loading is 0.5%, Sn loading is 0.6%, CeO 2 The loading amount of Ce in the medium is 3%, the loading amount of Ni is 0.1%, and 13.9mg H 2 PtCl 6 ·6H 2 O, 11.9mg SnCl 2 2H 2 O, 97.0mg Ce(NO 3 ) 3 ·6H 2 O and 5.2mg Ni(NO 3 ) 2 ·6H 2 O was dissolved in 1 mL of absolute ethanol, and the resulting solution was mixed with 1.0 g Al 2 o 3 Mix the powders, let stand at room temperature for 8 hours, then dry in a blast oven at 80°C for 6 hours, bake in a muffle furnace at 550°C for 4 hours, cool naturally to room temperature, press into tablets, granulate, and pass through a 40-60 mesh sieve to obtain Catalyst, recorded as 0.5%Pt-0.6%Sn-3%Ce-0.1%Ni / Al 2 o 3 .

Embodiment 2

[0025] Take Al 2 o 3 As a carrier, Pt loading is 0.5%, Sn loading is 0.6%, CeO 2 The loading amount of Ce in the medium is 3%, the loading amount of Co is 0.1%, and 13.9mg H 2 PtCl 6 ·6H 2 O, 11.9mg SnCl 2 2H 2 O, 97.0mg Ce(NO 3 ) 3 ·6H 2 O and 5.2mg Co(NO 3 ) 2 ·6H 2 O was dissolved in 1 mL of absolute ethanol, and the resulting solution was mixed with 1.0 g Al 2 o 3 Mix the powders, let stand at room temperature for 8 hours, then dry in a blast oven at 80°C for 6 hours, bake in a muffle furnace at 550°C for 4 hours, cool naturally to room temperature, press into tablets, granulate, and pass through a 40-60 mesh sieve to obtain Catalyst, recorded as 0.5%Pt-0.6%Sn-3%Ce-0.1%Co / Al 2 o 3 .

Embodiment 3

[0027] Take Al 2 o 3 As a carrier, Pt loading is 0.5%, Sn loading is 0.6%, CeO 2 The loading amount of Ce in the medium is 3%, the loading amount of Fe is 0.2%, and 13.9mg H 2 PtCl 6 ·6H 2 O, 11.9mg SnCl 2 2H 2 O, 97.1mg Ce(NO 3 ) 3 ·6H 2 O and 15.1mg Fe(NO 3 ) 3 9H 2 O was dissolved in 1 mL of absolute ethanol, and the resulting solution was mixed with 1.0 g Al 2 o 3 Mix the powders, let stand at room temperature for 8 hours, then dry in a blast oven at 80°C for 6 hours, bake in a muffle furnace at 550°C for 4 hours, cool naturally to room temperature, press into tablets, granulate, and pass through a 40-60 mesh sieve to obtain Catalyst, recorded as 0.5%Pt-0.6%Sn-3%Ce-0.2%Fe / Al 2 o 3 .

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Abstract

The invention discloses a platinum-based composite catalyst and method for preparing propylene and synthesis gas through propane oxidative dehydrogenation with CO2 in the presence of hydrogen. A carrier of the catalyst is SiO2 or Al2O3, active components are Pt and Sn, a first auxiliary agent is CeO2, and a second auxiliary agent is any one or more of Fe, Co, Ni, Pd, Ru and the like. Based on 100% of the mass of the catalyst, the loading capacity of Pt is 0.1%-1.0%, the loading capacity of Sn is 0.5%-5.0%, the loading capacity of Ce in the first auxiliary agent is 1.0%-5.0%, and the loading capacity of the second auxiliary agent is 0.01%-0.5%. The catalyst is prepared by adopting an impregnation method, and the preparation process is simple, economical and environment-friendly. The catalyst has high propane and carbon dioxide conversion rate and propylene yield for hydrogen dehydrogenation of carbon dioxide and propane oxide, is rich in synthesis gas, and has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a platinum-based composite catalyst for the simultaneous production of propylene and synthesis gas by oxidation of propane with carbon dioxide and the simultaneous production of propylene and synthesis gas by catalyzing the hydrogenation and dehydrogenation of propane with carbon dioxide. Methods. Background technique [0002] As one of the important organic raw materials in petrochemical production, propylene is generally used to produce derivative products such as polypropylene, isopropanol, glycerol, acrylonitrile, propylene oxide, acetone, and phenol. In recent years, with the rapid development of my country's economy, the demand for propylene has been growing steadily. At present, propylene mainly comes from steam pyrolysis and catalytic pyrolysis of clear oil such as naphtha, but there are problems such as low propylene yield, high energy consumption and lack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/63B01J35/02C01B3/40C07C5/333C07C11/06
CPCB01J23/8966B01J23/63B01J35/023B01J23/002C01B3/40C07C5/3332C01B2203/0238C01B2203/0283C01B2203/1082C01B2203/107C01B2203/1041C01B2203/1094C01B2203/1235C07C2523/89C07C2523/63B01J2523/00C07C11/06B01J2523/31B01J2523/3712B01J2523/43B01J2523/828B01J2523/847B01J2523/845B01J2523/842B01J2523/41B01J2523/821B01J2523/824Y02P20/52
Inventor 刘忠文伍晨迪葛汉青殷文超宋永红任星刘昭铁
Owner SHAANXI NORMAL UNIV
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