DOI: 10.1016/j.jcou.2018.11.012
Scopus记录号: 2-s2.0-85058062615
论文题名: Experimental and kinetic studies on in-situ CO2 gasification based chemical looping combustion of low ash coal using Fe2O3 as the oxygen carrier
作者: Bhui B. ; Vairakannu P.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2019
卷: 29 起始页码: 103
结束页码: 116
语种: 英语
英文关键词: Chemical looping combustion
; CO2 Capture
; CO2 Gasification
; Coal combustion
; In-situ gasification
; Kinetics
Scopus关键词: Atmospheric pressure
; Carbon dioxide
; Chemical reactors
; Coal
; Coal combustion
; Enzyme kinetics
; Fuels
; Gasification
; Gravimetric analysis
; Hematite
; Kinetics
; Metals
; Oxygen
; Thermogravimetric analysis
; Chemical looping combustion
; CO2 capture
; CO2 gasification
; Fixed bed reactor
; Gasification technologies
; Mode of operations
; Overall process
; Reaction orders
; In situ coal combustion
英文摘要: Chemical looping combustion (CLC) technology has grabbed the attention for rectifying the carbon capture issues with minimal energy penalty. The direct utilization of solid fuels such as coal and biomass in CLC by in-situ gasification technology would reduce the complexity of the overall process. In the present study, in-situ CO2 gasification of direct-coal fueled CLC experiments are conducted using a fixed bed reactor under atmospheric pressure in a batch-wise mode of operation. The low cost metal oxide, Fe2O3, is used as the oxygen carrier particles for the CLC of a low ash based North East Indian coal. Pyrolysis and CO2 gasification experiments are performed with and without the presence of metal oxides for estimating the CO2 yield. The results show that the CO2 yield is increased from 17.5% (without metal oxides) to 88.7% (with metal oxides) under the N2 atmosphere. A highest CO2 yield of 96% is observed under in-situ CO2 gasification incorporated CLC conditions. Further, thermo gravimetric analysis (TGA) is conducted to study the conversion and instantaneous reactivity between the coal and metal oxides. It is estimated that 83% conversion of the coal-Fe2O3 mixture is attained under the CO2 atmosphere, while it is 57% in the N2 atmosphere. The kinetic parameters are estimated using the TGA data for the reaction between coal and metal oxide under N2 and CO2 atmosphere using reaction order models. It is found that the first and third order models show the best fit for the non-CLC and CLC process, respectively. © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117323
Appears in Collections: 气候变化与战略
There are no files associated with this item.
Recommended Citation:
Bhui B.,Vairakannu P.. Experimental and kinetic studies on in-situ CO2 gasification based chemical looping combustion of low ash coal using Fe2O3 as the oxygen carrier[J]. Journal of CO2 Utilization,2019-01-01,29