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Conversion characteristics of lignite and petroleum coke in chemical looping combustion coupled with an annular carbon stripper
被引:25
作者:

Liu, Lei
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Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China

Li, Zhenshan
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Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China

Wu, Sanjun
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Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China

Li, Dan
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Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China

Cai, Ningsheng
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h-index: 0
机构:
Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China
机构:
[1] Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China
基金:
欧盟地平线“2020”;
关键词:
Chemical looping combustion;
Annular carbon stripper;
Solid fuel;
Kaolin-promoted manganese ore;
Char separation efficiency;
Carbon capture efficiency;
100 KW UNIT;
OXYGEN-CARRIER;
SOLID FUELS;
CO2;
GASIFICATION;
COAL COMBUSTION;
MANGANESE ORE;
OPERATION;
ILMENITE;
KINETICS;
DESIGN;
D O I:
10.1016/j.fuproc.2020.106711
中图分类号:
O69 [应用化学];
学科分类号:
081704 ;
摘要:
Chemical looping combustion (CLC) of solid fuels was studied in a 30 kW dual fluidized-bed system coupled with an annular carbon stripper for char separation by using a kaolin-promoted manganese ore oxygen carrier. Two solid fuels, a lignite and a petroleum coke, were tested in the CLC unit. The CLC unit was operated continuously for more than 160 h. The effects of the fuel size and residence time in the fuel reactor on the carbon capture efficiency and oxygen demand were investigated. The char separation efficiency of the annular carbon stripper reached 90%, and a maximum carbon capture efficiency of 97% was achieved for the 106-212 mu m lignite. The carbon capture efficiency was affected by the fuel particle size and residence time. When >212 mu m lignite particles were used, there was a similar to 12% oxygen demand. The carbon capture efficiency in the experiment with petroleum coke was only 45% due to the slow gasification rate. A model was applied to analyze the influence of key factors on the carbon capture efficiency. The redox kinetics of the tested oxygen carrier were studied by a micro-fluidized bed thermogravimetric analysis method.
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页数:10
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Univ Chinese Acad Sci, Beijing 100049, Peoples R China Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China