- Title
- Application of concrete and demolition waste as CO2 sorbent in chemical looping gasification of biomass
- Creator
- Moghtaderi, Behdad; Zanganeh, Jafar; Shah, Kalpit; Wu, Hongwei
- Relation
- ARC.LP100200871
- Relation
- Energy & Fuels Vol. 26, Issue 4, p. 2046-2057
- Publisher Link
- http://dx.doi.org/10.1021/ef300145t
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2012
- Description
- This paper summarizes the results of an experimental investigation into sorbent chemical looping gasification (SCLG) of biomass for the production of high-purity hydrogen and in situ capture of the resulting CO2. The key innovation was the use of concrete and demolition waste (CDW) as the source of CO2 sorbent. A comprehensive series of thermogravimetric analysis (TGA) experiments was carried out over a range of temperatures between 650 and 900 °C and pressures up to 20 atm to benchmark the CO2 capture efficiency of CDW against conventional lime-based sorbents [e.g., calcined limestone (CL) and hydrated Portland cement (HPC)]. Effects of controlling parameters, such as the Ca/C ratio, steam/carbon (S/C) ratio, steam partial pressure, and total pressure, on the gas yield, gas composition, and CO2 capture efficiency were thoroughly examined. Experimental results confirmed that CO2 capture efficiencies as high as 56.4% and high-grade hydrogen production can be achieved when CDW is used as a sorbent. These results combined with the high mechanical strength, durability, and low cost make CDW an attractive sorbent for chemical looping gasification of carbonaceous solid fuels, particularly biomass.
- Subject
- chemical looping; sorbents; biomass fuel; CO<sub>2</sub>
- Identifier
- http://hdl.handle.net/1959.13/1318957
- Identifier
- uon:23740
- Identifier
- ISSN:0887-0624
- Language
- eng
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