Catalyst and application thereof

A catalyst, catalyst quality technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, bulk chemical production, etc., to achieve good low-temperature catalytic activity, reduce gasification temperature, and overcome corrosiveness strong effect

Inactive Publication Date: 2015-10-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the catalyst that the low-order fuel supercritical water gasification that the present invention mainly relates to is made combustible gas is based on cerium zirconium solid solution (Ce x Zr 1-x o 2 ) as the carrier, and metal ruthenium (Ru) as the active component of the supported catalyst, there is no relevant literature report

Method used

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  • Catalyst and application thereof

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Effect test

Embodiment 1

[0027] Embodiment 1: The catalyst of this embodiment uses cerium-zirconium solid solution as a carrier, metal ruthenium as an active component, ruthenium in the catalyst accounts for 0.5% of the catalyst mass, and the molar ratio of cerium to zirconium in the cerium-zirconium solid solution carrier is 4: 1;

[0028] The preparation steps of this catalyst are as follows:

[0029] (1) Add polyethylene glycol in distilled water and stir until completely dissolved, the concentration of polyethylene glycol solution is 10 g / L;

[0030] (2) Add a mixture of cerium nitrate and zirconium nitrate to the solution in step (1), stir at a constant temperature of 80°C until completely dissolved, wherein the molar concentration of total metal ions of cerium and zirconium in the solution is 0.1 mol / L, cerium nitrate and nitric acid Zirconium is mixed with a molar ratio of cerium and zirconium of 4:1;

[0031] (3) Add ammonia water drop by drop to the solution in step (2) and stir, adjust the ...

Embodiment 2

[0037]Embodiment 2: The catalyst of this embodiment uses cerium-zirconium solid solution as the carrier, metal ruthenium as the active component, ruthenium in the catalyst accounts for 1.0% of the mass of the catalyst, and the molar ratio of cerium to zirconium in the cerium-zirconium solid solution carrier is 3:1;

[0038] The preparation steps of this catalyst are as follows:

[0039] (1) Add polyethylene glycol in distilled water and stir until completely dissolved, the concentration of polyethylene glycol solution is 20g / L;

[0040] (2) Add a mixture of cerium chloride and zirconium nitrate to the solution in step (1), stir at a constant temperature of 30°C until completely dissolved, wherein the molar concentration of total metal ions of cerium and zirconium in the solution is 0.2 mol / L, and cerium chloride Mix with zirconium nitrate in a molar ratio of 3:1 to cerium to zirconium;

[0041] (3) Add ammonia water drop by drop to the solution in step (2) and stir. After adj...

Embodiment 3

[0046] Embodiment 3: The catalyst of this embodiment uses cerium-zirconium solid solution as a carrier, metal ruthenium as an active component, ruthenium in the catalyst accounts for 2.5% of the mass of the catalyst, and the molar ratio of cerium to zirconium in the cerium-zirconium solid solution carrier is 2:1;

[0047] The preparation steps of this catalyst are as follows:

[0048] (1) Add polyethylene glycol in distilled water and stir until completely dissolved, the concentration of polyethylene glycol solution is 15g / L;

[0049] (2) Add the mixture of cerium chloride and zirconium sulfate to the solution in step (1), stir at a constant temperature of 50°C until completely dissolved, wherein the molar concentration of total metal ions of cerium and zirconium in the solution is 0.15 mol / L, cerium chloride Mix with zirconium sulfate in the ratio of cerium to zirconium molar ratio 2:1;

[0050] (3) Add ammonia water drop by drop to the solution in step (2) and stir. After ...

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Abstract

The invention relates to a catalyst and application of the catalyst to manufacturing combustible gas from low-order fuel in supercritical water by means of catalytic gasification, and particularly discloses application of a catalyst to manufacturing high-quality combustible gas such as methane and hydrogen from low-order fuel in supercritical water by means of catalytic gasification. The catalyst and the application have the advantages that the catalyst is a supported catalyst (Ru/Ce<x>Zr<1-x>O<2>), cerium-zirconium solid liquid is mainly used as a catalyst carrier of the supported catalyst (Ru/Ce<x>Zr<1-x>O<2>), metallic ruthenium is used as an active component of the supported catalyst (Ru/Ce<x>Zr<1-x>O<2>), accordingly, the catalyst is excellent in low-temperature catalytic activity when high-moisture low-order brown coal is catalytically gasified in the supercritical water by the aid of the catalyst, and volumetric components of the combustible gas in obtained gas products can be higher than 60%; the catalyst is applicable to manufacturing the combustible gas from the low-order fuel such as the high-moisture low-order brown coal, wet biomass, municipal sludge and bottom sludge in lakes.

Description

technical field [0001] The invention relates to a catalyst for catalytic gasification of low-order fuels in supercritical water to prepare combustible gases, in particular to the application of catalytic gasification of low-order fuels in supercritical water to prepare high-quality combustible gases such as methane and hydrogen. The catalyst is based on cerium-zirconium solid solution (Ce x Zr 1-x o 2 ) as the carrier, with metal ruthenium (Ru) as the active component, the selected catalyst is used in the supercritical water gasification reaction to obtain a mixed gas with a combustible gas volume content exceeding 60%, which has good low-temperature catalytic activity. Background technique [0002] As the concentration of carbon dioxide in the atmosphere continues to increase and the reserves of traditional fossil fuels are decreasing, people are paying more and more attention to seeking alternative energy sources and obtaining energy from low-quality organic matter. For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63C10J3/00
CPCY02P20/52Y02P20/54
Inventor 陈秋玲喻江东谷俊杰关清卿宁平张秋林卢秀云余璐
Owner KUNMING UNIV OF SCI & TECH
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