TY - JOUR
T1 - Gasification biochar from biowaste (food waste and wood waste) for effective CO2 adsorption
AU - Igalavithana, Avanthi Deshani
AU - Choi, Seung Wan
AU - Dissanayake, Pavani Dulanja
AU - Shang, Jin
AU - Wang, Chi Hwa
AU - Yang, Xiao
AU - Kim, Sumin
AU - Tsang, Daniel C.W.
AU - Lee, Ki Bong
AU - Ok, Yong Sik
N1 - Funding Information:
This study was supported by the Korea Ministry of Environment (MOE) as “Technology Program for establishing biocide safety management” ( 2018002490001 ) and Hydrogen Energy Innovation Technology Development Program of the National Research Foundation of Korea (NRF) funded by the Korean government (Ministry of Science and ICT(MSIT)) ( NRF-2019M3E6A1064197 ).
Funding Information:
This study was supported by the Korea Ministry of Environment (MOE) as ?Technology Program for establishing biocide safety management? (2018002490001) and Hydrogen Energy Innovation Technology Development Program of the National Research Foundation of Korea (NRF) funded by the Korean government (Ministry of Science and ICT(MSIT)) (NRF-2019M3E6A1064197).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/6/5
Y1 - 2020/6/5
N2 - Biochar is newly proposed as an innovative and cost-effective material to capture CO2. In this study, biochar was produced from feedstock mixtures of food waste and wood waste (i.e., 20%:80% WFW20, 30%:70% WFW30 and 40%:60% WFW40) by gasification. The two biochar adsorbents containing the highest percentage of food waste, i.e., WFW40-K and WFW40-KC, were activated by KOH and KOH + CO2, respectively. The biochar adsorbents were then tested for CO2 adsorption at room temperature of 25 °C by using a volumetric sorption analyzer. The WFW20 showed the highest CO2 adsorption capacity, while higher percentage of food waste in the feedstock was unfavorable for the CO2 adsorption. The presence of N and S on the biochar surface was the primary contributor to the high CO2 uptake on WFW20. The development of micropores by KOH activation significantly increased the CO2 adsorption on WFW40-K, but KOH + CO2 activation could not further increase the development of micropores and subsequent CO2 adsorption. Moreover, WFW40-K showed >99% recyclability during 10 consecutive adsorption-desorption cycles. The biochars derived from biowaste (food waste and wood waste) could be effective adsorbents for CO2 capture by providing green solution for food waste recycling.
AB - Biochar is newly proposed as an innovative and cost-effective material to capture CO2. In this study, biochar was produced from feedstock mixtures of food waste and wood waste (i.e., 20%:80% WFW20, 30%:70% WFW30 and 40%:60% WFW40) by gasification. The two biochar adsorbents containing the highest percentage of food waste, i.e., WFW40-K and WFW40-KC, were activated by KOH and KOH + CO2, respectively. The biochar adsorbents were then tested for CO2 adsorption at room temperature of 25 °C by using a volumetric sorption analyzer. The WFW20 showed the highest CO2 adsorption capacity, while higher percentage of food waste in the feedstock was unfavorable for the CO2 adsorption. The presence of N and S on the biochar surface was the primary contributor to the high CO2 uptake on WFW20. The development of micropores by KOH activation significantly increased the CO2 adsorption on WFW40-K, but KOH + CO2 activation could not further increase the development of micropores and subsequent CO2 adsorption. Moreover, WFW40-K showed >99% recyclability during 10 consecutive adsorption-desorption cycles. The biochars derived from biowaste (food waste and wood waste) could be effective adsorbents for CO2 capture by providing green solution for food waste recycling.
KW - Engineered biochar
KW - Negative emission technology
KW - Sustainable Development Goals (SDGs)
KW - Sustainable waste management
KW - Waste recycling/valorization
UR - http://www.scopus.com/inward/record.url?scp=85075902626&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2019.121147
DO - 10.1016/j.jhazmat.2019.121147
M3 - Article
C2 - 32145924
AN - SCOPUS:85075902626
SN - 0304-3894
VL - 391
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 121147
ER -
