A method and device for continuous supercritical water fixed-bed catalytic gasification of organic matter

A technology of supercritical water and organic matter, applied in the direction of gasification process, manufacture of combustible gas, bulk chemical production, etc. The effect of gasification rate

Active Publication Date: 2019-04-19
陕西中核交大超洁能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, quartz tube reactors and tank reactors belong to batch reactors. These batch reactors are limited to research on reaction paths and mechanisms, gasification kinetics and laws, catalyst evaluation, etc., and cannot be used for large-scale production.

Method used

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  • A method and device for continuous supercritical water fixed-bed catalytic gasification of organic matter
  • A method and device for continuous supercritical water fixed-bed catalytic gasification of organic matter
  • A method and device for continuous supercritical water fixed-bed catalytic gasification of organic matter

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Effect test

Embodiment 1

[0038] A continuous supercritical water fixed bed device was used to study the hydrogen production by catalytic gasification of glucose solution. A 5% Ru / C catalyst was used. The catalyst was placed in the middle of the reactor. The particle size of the catalyst was between 100-200 mesh. The height is 20cm, the residence time of the material in the reactor is 30s, the reaction temperature is 400-500°C, the pressure is 23MPa, and the glucose concentration range is 5-20wt.%.

[0039] Experimental research on glucose gasification at different temperatures in a fixed bed shows that the glucose solution with a feed concentration of 10% is nearly completely gasified at 400-500°C. The composition of gas produced at different temperatures is different, and high temperature is conducive to the formation of hydrogen and inhibits the formation of methane. As shown in Table 1:

[0040] Table 1 Variation of glucose gas production with temperature in fixed bed

[0041] (Material concentra...

Embodiment 2

[0048] A continuous supercritical water fixed bed device was used to study the catalytic gasification of depolymerization residual liquid to produce hydrogen. The depolymerization residual liquid used was wastewater after cassava oil production. The depolymerization residual liquid was mainly composed of alcohols, ketones, and esters. The initial COD value of the depolymerization raffinate was 194.6g / L. Ru / C catalyst is used, the catalyst is placed in the middle of the reactor, the catalyst particle size is between 200-300 mesh, the catalyst bed height is 20cm, the residence time of the material in the reactor is about 30s, and the reaction temperature is 400-500°C. Pressure 23MPa.

[0049] The supercritical water gasification of depolymerization raffinate under different temperature, concentration and ruthenium loading conditions was studied in a fixed bed using ruthenium carbon as a catalyst. The results show that under different conditions of temperature, concentration and...

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Abstract

The invention discloses a continuous supercritical water fixed bed method and device for catalytic gasification of organic substances; the reaction device is composed of a booster pump, a heat regenerator, a preheater, a fixed bed reactor, a cooler, a filter, a counterbalance valve, a gas-liquid separator, a gas flow meter, a monitoring system and the like; the device can continuously and stably run for a long time, and the operation is simple and convenient. The fixed bed reactor can be loaded with catalysts with different particle sizes (5-500 mesh) and different shape types (granular type, powder type and regular type). The method and the device can effectively reduce the temperature and pressure required for the gasification reaction of the organic substances, improve the yield of hydrogen or methane, and reduce the complexity and cost of the process.

Description

【Technical field】 [0001] The invention belongs to the field of clean utilization of renewable resources and wastes, and in particular relates to a method and device for catalytically gasifying organic matter in a continuous supercritical water fixed bed. 【Background technique】 [0002] Supercritical water (SCW for short) refers to water with a temperature greater than 374°C and a pressure greater than 22.1MPa. Under this working condition, supercritical water has completely different physical and chemical properties from water at normal temperature and pressure. Supercritical water is a single dense phase, with only a small amount of hydrogen bonds in water, and low dielectric constant. High solubility, large ion product constant, small viscosity, and large diffusion coefficient make supercritical water have unique and significant advantages in the gasification of organic matter. [0003] Conventional organic waste treatment, which can be dried and burned to generate electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/00C10J3/72C10J3/74
CPCC10J3/00C10J3/72C10J3/74C10J2300/0946C10J2300/0979C10J2300/0986Y02P20/52Y02P20/54
Inventor 郭烈锦朱超金辉王润宇魏雯雯王立寇家静
Owner 陕西中核交大超洁能源技术有限公司
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