Application of transition metal phosphide in catalytic conversion of lignin

A transition metal, catalytic conversion technology, applied in the preparation of organic compounds, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., to alleviate the tension of petroleum resources, the preparation method is simple, and the effect of avoiding environmental pollution problems

Inactive Publication Date: 2014-12-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the research results of the literature, the catalytic conversion of lignin currently reported is ...

Method used

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  • Application of transition metal phosphide in catalytic conversion of lignin

Examples

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Embodiment 1

[0041] Weigh diammonium hydrogen phosphate and dissolve it in deionized water, then add transition metal salt ammonium metatungstate and dissolve it, and impregnate an equal volume into Al 2 o 3 , and then oven-dried at 120°C for 12h, then calcined at 500°C for 4h, and the catalyst precursor was subjected to a temperature-programmed reduction reaction to obtain a transition metal phosphide WP / Al with a tungsten loading of 20wt%. 2 o 3 (20wt%WP / Al 2 o 3 ), the specific temperature-programmed reduction process is: in H 2 In the atmosphere, 0.5 g of the precursor was placed in a quartz reaction tube and the temperature was raised to 300 °C, then raised to 650 °C at 1 °C / min and kept for 120 min, and then lowered to room temperature 25 °C.

[0042] Weigh diammonium hydrogen phosphate and dissolve it in deionized water, then add transition metal salt ammonium metatungstate and dissolve it, evaporate the water in it, dry it, and carry out a temperature-programmed reaction under ...

Embodiment 2

[0044] The catalyst preparation method is the same as in Example 1, except that the difference from Example 1 is that the concentration of the transition metal salt in the impregnating solution can be changed, or through multiple impregnations, catalysts with different loads can be obtained, such as the amount of W being 1wt%, respectively. 5wt%, 10wt%, 15wt%, 20wt%, 30wt% and 50wt% WP / Al 2 o 3 catalyst.

Embodiment 3

[0046] The catalyst preparation method is the same as in Example 1, and the difference from Example 1 is that the carrier is changed, and the transition metal salt and diammonium hydrogen phosphate solution are impregnated into SiC, SiO 2 Or on acidified activated carbon (AC) carrier, phosphides loaded on different carriers can be obtained.

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Abstract

The invention discloses an application of a transition metal phosphide in catalytic conversion of lignin; the transition metal phosphide is a Z-AB/C loaded type catalyst or an assistant-free tungsten phosphide catalyst (loaded type and non-loaded type), wherein Z is an assistant, A is a transition metal W or Mo, B is phosphorus, and C is a catalyst carrier; the catalyst is prepared by adopting an impregnation method for preparation and then carrying out hydrogen gas temperature programmed reduction. The invention provides a method for preparing organic chemical phenolic substances through catalytic conversion of the lignin with the phosphide catalyst, and the lignin is converted into small molecular compounds with high additional values through a one-step reaction, so as to realize high-efficiency utilization of the lignin.

Description

technical field [0001] The invention relates to a method for preparing liquid fuel and organic chemicals from biomass, more specifically, a process for catalytically degrading lignin into organic chemicals including alcohols, ethers, and phenolic compounds with a phosphide catalyst. Background technique [0002] With the continuous development of the economy, non-recyclable fossil resources such as coal, oil, and natural gas are continuously consumed, and the energy crisis and environmental pollution problems are becoming increasingly serious. Therefore, the development and utilization of renewable resources to replace non-renewable resources has become an inevitable trend of world economic development. As the most extensive renewable resource in the world, biomass energy mainly includes cellulose, hemicellulose and lignin. widespread human attention. At present, most of the biomass is directly used as firewood. There have been extensive reports on the degradation of cellu...

Claims

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Application Information

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IPC IPC(8): C07C27/00C07C41/18C07C43/23
CPCC07C29/00B01J27/188B01J27/19B01J2523/00B01J2523/17B01J2523/31B01J2523/51B01J2523/67B01J2523/68B01J2523/69B01J2523/842B01J2523/845B01J2523/847C07C41/01C07C45/00C07C319/14C07C31/12C07C323/22C07C321/14C07C43/23C07C49/84
Inventor 李永丹马小垒
Owner TIANJIN UNIV
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