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Bioresour Technol


Title:Carbon dioxide assisted sustainability enhancement of pyrolysis of waste biomass: A case study with spent coffee ground
Author(s):Cho DW; Cho SH; Song H; Kwon EE;
Address:"Department of Environment and Energy, Sejong University, Seoul 143-747, South Korea. Department of Environment and Energy, Sejong University, Seoul 143-747, South Korea. Electronic address: ekwon74@sejong.ac.kr"
Journal Title:Bioresour Technol
Year:2015
Volume:20150404
Issue:
Page Number:1 - 6
DOI: 10.1016/j.biortech.2015.04.002
ISSN/ISBN:1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:"This work mainly presents the influence of CO2 as a reaction medium in the thermo-chemical process (pyrolysis) of waste biomass. Our experimental work mechanistically validated two key roles of CO2 in pyrolysis of biomass. For example, CO2 expedited the thermal cracking of volatile organic compounds (VOCs) evolved from the thermal degradation of spent coffee ground (SCG) and reacted with VOCs. This enhanced thermal cracking behavior and reaction triggered by CO2 directly led to the enhanced generation of CO ( approximately 3000%) in the presence of CO2. As a result, this identified influence of CO2 also directly led to the substantial decrease ( approximately 40-60%) of the condensable hydrocarbons (tar). Finally, the morphologic change of biochar was distinctive in the presence of CO2. Therefore, a series of the adsorption experiments with dye were conducted to preliminary explore the physico-chemical properties of biochar induced by CO2"
Keywords:Adsorption *Biomass Carbon Dioxide/*pharmacology Carbon Monoxide/analysis Charcoal/chemistry Coffee/*chemistry Coloring Agents/isolation & purification Hydrogen Methylene Blue/chemistry Nitrogen/pharmacology Refuse Disposal/*methods *Temperature Volatile;
Notes:"MedlineCho, Dong-Wan Cho, Seong-Heon Song, Hocheol Kwon, Eilhann E eng Research Support, Non-U.S. Gov't England 2015/04/13 Bioresour Technol. 2015; 189:1-6. doi: 10.1016/j.biortech.2015.04.002. Epub 2015 Apr 4"

 
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