Study on the interaction between CaO-based sorbents and coal ash in calcium looping process

He, Donglin, Qin, Changlei, Manovic, Vasilije, Ran, Jingyu and Feng, Bo (2016) Study on the interaction between CaO-based sorbents and coal ash in calcium looping process. Fuel Processing Technology, 156 339-347. doi:10.1016/j.fuproc.2016.09.017


Author He, Donglin
Qin, Changlei
Manovic, Vasilije
Ran, Jingyu
Feng, Bo
Title Study on the interaction between CaO-based sorbents and coal ash in calcium looping process
Journal name Fuel Processing Technology   Check publisher's open access policy
ISSN 0378-3820
1873-7188
Publication date 2016-09-21
Sub-type Article (original research)
DOI 10.1016/j.fuproc.2016.09.017
Open Access Status Not yet assessed
Volume 156
Start page 339
End page 347
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Subject 1500 Chemical Engineering
2103 Fuel Technology
2102 Energy Engineering and Power Technology
Abstract Calcium looping (CaL), implemented via cyclic carbonation and calcination of calcium-based sorbents, is a novel and promising technology in reducing emissions of CO into the atmosphere. The reactivity of CaO is important in calcium looping, but its CO sorption will be affected by the presence of ash deriving from coal combustion in the calciner. We report here, the investigation of influence of coal-derived ash on CaO-based sorbents using a thermogravimetric analyzer and a combination of other techniques. As a result of this work, our understanding of the role of several key variables (sorbent type, ash content and its particle size, the calcination conditions) and how they interact during repeated cycles of CO sorption and desorption, has been greatly enhanced. Furthermore, an attempt was made to explain the interaction mechanism between sorbents and coal-derived ash. It is proposed that the blockage of pores blow 3 nm due to ash deposition and subsequent grains agglomeration are the main reason for CaO-based sorbents' loss in CO carrying capacity.
Formatted abstract
Calcium looping (CaL), implemented via cyclic carbonation and calcination of calcium-based sorbents, is a novel and promising technology in reducing emissions of CO2 into the atmosphere. The reactivity of CaO is important in calcium looping, but its CO2 sorption will be affected by the presence of ash deriving from coal combustion in the calciner. We report here, the investigation of influence of coal-derived ash on CaO-based sorbents using a thermogravimetric analyzer and a combination of other techniques. As a result of this work, our understanding of the role of several key variables (sorbent type, ash content and its particle size, the calcination conditions) and how they interact during repeated cycles of CO2 sorption and desorption, has been greatly enhanced. Furthermore, an attempt was made to explain the interaction mechanism between sorbents and coal-derived ash. It is proposed that the blockage of pores blow 3nm due to ash deposition and subsequent grains agglomeration are the main reason for CaO-based sorbents' loss in CO2 carrying capacity.
Keyword Calcium looping
CO2 capture
Cyclic carbonation and calcination
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 51606018
2015M572448
Xm2015002
106112015CDJXY140005
LLEUTS-2016004
LLEUTS-201411
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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