Method for preparing oxygen carrier of fuel coal chemical-looping combustion by using equal volume impregnation process

A technology of chemical chain combustion and equal volume impregnation, which is applied in the direction of fuel, fuel additives, petroleum industry, etc., can solve the problems of insufficient utilization of red mud, land occupation, and environmental pollution caused by strong alkalinity, so as to achieve resource efficiency Utilization, good reactivity, cost reduction effect

Inactive Publication Date: 2020-02-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of red mud cannot be fully and effectively utilized, so it can only be stacked in a large area, which not only occupies a large amount of land, but also causes serious pollution to the environment due to its strong alkalinity

Method used

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  • Method for preparing oxygen carrier of fuel coal chemical-looping combustion by using equal volume impregnation process
  • Method for preparing oxygen carrier of fuel coal chemical-looping combustion by using equal volume impregnation process
  • Method for preparing oxygen carrier of fuel coal chemical-looping combustion by using equal volume impregnation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the method for preparing coal-fired chemical looping combustion oxygen carrier by equal-volume impregnation method comprises the following steps:

[0023] Step 1. Wash the red mud repeatedly until the pH is 7, dry it at 120°C for 12 hours, and then roast it at 900°C for 4 hours to make fine particles, internally porous, and specific surface area Large materials are ground into red mud powder after roasting, and a small part of the red mud powder is taken to measure the saturated water absorption of the red mud; the specific process of measuring the saturated water absorption of the red mud is: add excess deionized water to the red mud powder Water to obtain a slurry, the slurry was stirred ultrasonically (ultrasonic frequency: 53kHz) for 25 minutes and then placed in a constant temperature water bath at 60°C for 12 hours; the supernatant in the placed slurry was poured out and the volume was measured, and the volume of excess deionized water w...

Embodiment 2

[0030] Such as figure 1 As shown, the method for preparing coal-fired chemical looping combustion oxygen carrier by equal-volume impregnation method comprises the following steps:

[0031] Step 1. Wash the red mud repeatedly until the pH is 7, dry it at 110°C for 24 hours, and then roast it at 800°C for 2 hours to make fine particles, internally porous, and specific surface area Large materials are ground into red mud powder after roasting, and a small part of the red mud powder is taken to measure the saturated water absorption of the red mud; the specific process of measuring the saturated water absorption of the red mud is: add excess deionized water to the red mud powder Water to obtain a slurry, the slurry was stirred ultrasonically (ultrasonic frequency: 53kHz) for 20 minutes and placed in a constant temperature water bath at 60°C for 12 hours; the supernatant in the placed slurry was poured out and the volume was measured, and the volume of excess deionized water was su...

Embodiment 3

[0038] Such as figure 1 As shown, the method for preparing coal-fired chemical looping combustion oxygen carrier by equal-volume impregnation method comprises the following steps:

[0039]Step 1. Wash the red mud repeatedly until the pH is 7, dry it at 130°C for 12 hours, and then roast it at 1000°C for 2 hours to make fine particles, internally porous, and specific surface area Large materials are ground into red mud powder after roasting, and a small part of the red mud powder is taken to measure the saturated water absorption of the red mud; the specific process of measuring the saturated water absorption of the red mud is: add excess deionized water to the red mud powder Water to obtain a slurry, the slurry was stirred ultrasonically (ultrasonic frequency: 53kHz) for 30 minutes and then placed in a constant temperature water bath at 70°C for 12 hours; the supernatant in the placed slurry was poured out and the volume was measured, and the volume of excess deionized water w...

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Abstract

The invention relates to a method for preparing an oxygen carrier of fuel coal chemical-looping combustion by using an equal volume impregnation process, and belongs to the technical field of energy environment. The method comprises the following steps: repeatedly washing red mud until the pH is 7, performing drying at 110-150 DEG C for 12-24 h, performing roasting at 800-1000 DEG C for 2-6 h, after roasting is completed, performing grinding to form red mud powder, taking a small amount of the red mud powder, and measuring a saturation water absorption amount of the red mud; adding water intoa carrier, an auxiliary agent and an active ingredient to prepare a solution, wherein the volume of the solution is a volume corresponding to the saturation water absorption amount of the added red mud, slowly adding the red mud powder in the step 1 dropwise into the solution to form slurry, performing ultrasonic stirring for 20-30 min, placing the stirred material in a constant-temperature waterbath at 50-70 DEG C for 12 h, performing drying at 110-150 DEG C for 12-24 h, and performing conventional molding to obtain a molded mixture; and roasting the molded mixture at 800-1000 DEG C for 2-6h to obtain the oxygen carrier of the fuel coal chemical-looping combustion. According to the method, a modifier can be in full contact with the red mud base to form the material having fine particles, more internal pores and a large specific surface area, and the carrier has better reactivity with coal.

Description

technical field [0001] The invention relates to a method for preparing a coal-fired chemical looping combustion oxygen carrier by using an equal-volume impregnation method, and belongs to the technical field of energy and environment. Background technique [0002] In recent years, global warming has aroused widespread concern from countries all over the world and the public. Studies have shown that the increase in the concentration of greenhouse gases in the atmosphere is the culprit of global warming, and CO2 gas accounts for 77% of all greenhouse gas components, so CO 2 Greenhouse gases contribute the most to global warming. Domestically, CO 2 The industry with the largest emissions is the power generation industry, which uses coal as the main fuel 2 emissions accounted for domestic CO 2 About 50% of the total emissions. Based on this, the development of clean and efficient CO 2 Emission reduction technology is of great significance to the sustainable development of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00
CPCC10L10/00
Inventor 李孔斋林伸顾振华王华祝星隆颜徽杨坤
Owner KUNMING UNIV OF SCI & TECH
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