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Method for preparing calcium-based oxygen carrier

An oxygen carrier and calcium-based technology, applied in chemical instruments and methods, fuel additives, petroleum industry, etc., can solve the problems of low mechanical strength and high price, and achieve the effect of high mechanical strength, low price and high reactivity

Active Publication Date: 2014-11-26
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the defects of high price and low mechanical strength existing in the existing oxygen carrier, and to provide a preparation method of calcium-based oxygen carrier

Method used

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  • Method for preparing calcium-based oxygen carrier
  • Method for preparing calcium-based oxygen carrier
  • Method for preparing calcium-based oxygen carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 40g calcium sulfate (CaSO 4 ) particles, 40ml silica sol and 10 large and small grinding balls are put into the ball mill jar together. Set the rotational speed of the ball mill to 200r / min, and the milling time to 6h. The product collected after ball milling was extruded into strips with a needle tube and other forming tools, and dried at room temperature for 12 hours. Finally, the shaped product is placed in a muffle furnace at 800° C. for calcination for 5 hours to obtain a strip-shaped oxygen carrier with an inert carrier loading of 50% (see figure 1 ).

[0017] The mechanical strength of the obtained oxygen carrier with a diameter of 2mm and a length of 4mm can reach 45.65N, and its mechanical strength is measured according to the average compressive strength of particles in GB 102012-88; at the same time, pure sulfuric acid without adding inert components is prepared under the same conditions The mechanical strength of calcium oxygen carrier is 0N.

Embodiment 2

[0019] 50g calcium sulfate (CaSO 4 ) particles, 50ml silica sol and 10 large and small grinding balls are put into the ball mill jar together. Set the rotational speed of the ball mill to 200r / min, and the milling time to 6h. The product collected after ball milling was extruded into strips with a needle tube and other forming tools, and dried at room temperature for 12 hours. Finally, the shaped product was placed in a muffle furnace at 800° C. for calcination for 5 hours to obtain a strip-shaped oxygen carrier with an inert carrier loading of 50%.

[0020] The mechanical strength of the obtained oxygen carrier can reach 45.65N, and the mechanical strength of the pure calcium sulfate oxygen carrier without adding inert components prepared under the same conditions is 0N.

Embodiment 3

[0022] 50g calcium sulfate (CaSO 4 ) particles, 10ml of silica sol, 20ml of deionized water and 10 large and small balls are put into the ball mill jar together. Set the rotational speed of the ball mill to 200r / min, and the milling time to 6h. The product collected after ball milling was extruded into strips with a needle tube and other forming tools, and dried at room temperature for 12 hours. Finally, the shaped product was placed in a muffle furnace at 800° C. for calcination for 5 hours to obtain a strip-shaped oxygen carrier with an inert carrier loading of 16.7%.

[0023] The mechanical strength of the obtained oxygen carrier can reach 13N, and the mechanical strength of the pure calcium sulfate oxygen carrier without adding inert components prepared under the same conditions is 0N.

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Abstract

The invention belongs to the technical field of preparation of an oxygen carrier in a chemical chain combustion system, and particularly relates to a method for preparing a calcium-based oxygen carrier. The oxygen carrier is prepared by the following steps: with calcium sulfate as a main body material, and pseudo-boehmite, silica sol and the like as inert components, adding calcium sulfate powder, the inert components and a proper amount of water to a ball mill; fully mixing; and carrying out an extrusion forming process, a drying process and a calcining process to obtain a stripe oxygen carrier with certain mechanical strength. The method has the advantages of being simple in preparation method, and the prepared oxygen carrier is low in price, high in oxygen carrying capacity, high in mechanical strength and the like. According to the preparation method of the calcium-based oxygen carrier with industrial potential, provided by the invention, the problems that the oxygen carrier is difficult to mold and poor in mechanical strength in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of preparation of oxygen carriers in chemical looping combustion systems, and in particular relates to a preparation method of calcium-based oxygen carriers. Background technique [0002] Chemical-looping combustion technology (Chemical-looping Combustion, CLC) is a new combustion technology that can achieve high-efficiency and low-cost CO 2 catch. The basic principle of chemical looping combustion is to achieve indirect combustion of air and fuel through the reduction and oxidation reactions of oxygen carriers. The CLC system consists of an oxidation reactor, namely an air reactor, a reduction reactor, namely a fuel reactor, and an oxygen carrier. Oxygen carrier is composed of metal oxide or non-metallic sulfuric acid compound and carrier, in which metal oxide or non-metallic sulfuric acid compound is the substance that really participates in the reaction to transfer oxygen, and the carrier is used to sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00B01J27/053
Inventor 吴晋沪毕文卓陈天举赵瑞东武景丽
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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