Gasification biochar from biowaste (food waste and wood waste) for effective CO2 adsorption

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

10 Scopus Citations
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Author(s)

  • Avanthi Deshani Igalavithana
  • Seung Wan Choi
  • Pavani Dulanja Dissanayake
  • Chi-Hwa Wang
  • Xiao Yang
  • Sumin Kim
  • Daniel C.W. Tsang
  • Ki Bong Lee
  • Yong Sik Ok

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number121147
Journal / PublicationJournal of Hazardous Materials
Volume391
Online published3 Sep 2019
Publication statusPublished - 5 Jun 2020

Abstract

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.

Research Area(s)

  • Engineered biochar, Negative emission technology, Sustainable Development Goals (SDGs), Sustainable waste management, Waste recycling/valorization

Citation Format(s)

Gasification biochar from biowaste (food waste and wood waste) for effective CO2 adsorption. / Igalavithana, Avanthi Deshani; Choi, Seung Wan; Dissanayake, Pavani Dulanja; Shang, Jin; Wang, Chi-Hwa; Yang, Xiao; Kim, Sumin; Tsang, Daniel C.W.; Lee, Ki Bong; Ok, Yong Sik.

In: Journal of Hazardous Materials, Vol. 391, 121147, 05.06.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal