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A kind of iron-based oxygen carrier based on mesoporous silicon-based molecular sieve and preparation method thereof

A technology of molecular sieve and mesoporous silicon, which is applied in the petroleum industry, fuel additives, fuels, etc., can solve the problems of heavy metal secondary pollution, high price, poor physical and chemical properties, etc., and achieve the effect of improving reactivity

Inactive Publication Date: 2011-11-30
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main oxygen carriers studied are metal oxides such as Fe, Ni, Co, Cu, Mn, etc. Most of the metal oxides have the advantages of high reaction rate and high temperature resistance, but there are also some inherent defects, such as Poor physical and chemical properties at high temperature, high price, secondary pollution of heavy metals, etc. In order to improve the reaction characteristics, service life, anti-sintering ability of the oxygen carrier, the oxygen carrier can be mixed with other compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An iron-based oxygen carrier based on a mesoporous silicon-based molecular sieve, the preparation method of which is:

[0025] Step (1): measure the ferric nitrate (Fe(NO 3 ) 3 9H 2 O) be dissolved in 80g of deionized water; in addition, measure 10g of SBA-15 and add to the above solution, ultrasonically treat for 5h and let stand for 12h, then filter to collect the filter residue;

[0026] Step (2): Measure 100g of deionized water, put the filter residue obtained in step (1) into it and ultrasonically treat it for 5s, then filter and collect the filter residue;

[0027] Step (3): Dry the filter residue obtained in step (2) at 110°C for 3 hours in an ordinary blast drying oven, and roast in a muffle furnace at 550°C for 3 hours (programmed temperature rise rate is 2°C / min, holding time is 3h) , that is, get Fe 2 o 3 / SBA-15 oxygen carrier (where Fe 2 o 3 The mass percentage composition is 18%).

[0028] The self-developed fluidized bed chemical looping combustio...

Embodiment 2

[0030] An iron-based oxygen carrier based on a mesoporous silicon-based molecular sieve, the preparation method of which is:

[0031] Step (1): measure the ferric nitrate (Fe(NO 3 ) 3 9H 2 O) be dissolved in 60g of deionized water; in addition, measure 10g of SBA-15 and add to the above solution, ultrasonically treat for 5h and let stand for 12h, then filter to collect the filter residue;

[0032] Step (2): Take 80g of deionized water, put the filter residue obtained in step (1) into it and ultrasonically treat it for 10s, then filter and collect the filter residue;

[0033] Step (3): Dry the filter residue obtained in step (2) at 110°C for 3 hours in an ordinary blast drying oven, and roast in a muffle furnace at 550°C for 3 hours (programmed temperature rise rate is 2°C / min, holding time is 3h) , that is, get Fe 2 o 3 / SBA-15 oxygen carrier (where Fe 2 o 3 The mass percentage composition is 23%).

[0034] The self-developed fluidized bed chemical looping combustion t...

Embodiment 3

[0036] An iron-based oxygen carrier based on a mesoporous silicon-based molecular sieve, the preparation method of which is:

[0037] Step (1): measure the ferric nitrate (Fe(NO 3 ) 3 9H 2 O) be dissolved in 80g of deionized water; in addition, measure 10g of MCM-41 and add to the above solution, ultrasonically treat for 5h and let stand for 12h, then filter to collect the filter residue;

[0038] Step (2): Measure 100g of deionized water, put the filter residue obtained in step (1) into it and ultrasonically treat it for 5s, then filter and collect the filter residue;

[0039] Step (3): Dry the filter residue obtained in step (2) at 110°C for 3 hours in an ordinary blast drying oven, and roast in a muffle furnace at 550°C for 3 hours (programmed temperature rise rate is 2°C / min, holding time is 3h) , that is, get Fe 2 o 3 / MCM-41 oxygen carrier (where Fe 2 o 3 The mass percentage composition is 17%).

[0040] The self-developed fluidized bed chemical looping combustion...

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Abstract

The invention belongs to the technical field of chemical looping combustion, and specifically relates to a novel iron-based oxygen carrier based on a mesoporous silicon-based molecular sieve and a preparation method thereof. The present invention uses mesoporous silicon-based molecular sieve as carrier and Fe2O3 as active component to obtain iron-based oxygen carrier based on mesoporous silicon-based molecular sieve; in the oxygen carrier, the mass percentages of mesoporous silicon-based molecular sieve and Fe2O3 are respectively 50-95% and 5-50%. The iron-based oxygen carrier prepared with mesoporous silicon-based molecular sieve has a large specific surface area, which can make Fe2O3 highly dispersed, thereby avoiding the sintering of Fe2O3, and the inert carrier SiO2 will not react with Fe2O3, avoiding the loss of Fe2O3; In the chemical chain combustion process of H2, CO, CH4, mixed combustible gas, coal, biomass and other gases and solid fuels, it shows good reactivity, stability, wear resistance and service life.

Description

technical field [0001] The invention belongs to the technical field of chemical looping combustion, and in particular relates to a novel iron-based oxygen carrier based on a mesoporous silicon-based molecular sieve and a preparation method thereof. technical background [0002] In 1983, German scientists Richter and Knoche first proposed the concept of chemical loop combustion, which is an efficient, clean and economical new flameless combustion technology with the ability to enrich CO 2 characteristics have attracted much attention. Among them, the selection of an oxygen carrier with good physical and chemical properties will directly affect the operation of the entire chemical looping combustion system. At present, the choice of oxygen carrier has become the key to restrict the whole chemical looping combustion system. [0003] In the process of chemical looping combustion, the main indicators for evaluating oxygen carriers are: reactivity with fuel and air, thermal stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00
Inventor 董长青陆强刘行磊杨勇平覃吴
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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