Pyrolysis process of agricultural waste using CO2 for waste management, energy recovery, and biochar fabrication

Jechan Lee, Xiao Yang, Seong Heon Cho, Jae Kon Kim, Sang Soo Lee, Daniel C.W. Tsang, Yong Sik Ok, Eilhann E. Kwon

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

This study focused on the mechanistic understanding of CO2 in pyrolysis process of agricultural waste to achieve waste management, energy recovery, and biochar fabrication. In order to scrutinize the genuine role of CO2 in the biomass pyrolysis, all pyrogenic products such as syngas, pyrolytic oil (i.e., tar), and biochar generated from pyrolysis of red pepper stalk in N2 and CO2 were characterized. Thermo-gravimetric analysis confirmed that during the thermolysis of red pepper stalk, the magnitude of exothermic reaction in CO2 from 220 to 400 °C was substantially different from that in N2, resulting in the different extents of carbonization. The physico-chemical properties of biochar produced in CO2 were varied compared to biochar produced in N2. For example, the surface area of biochar produced in CO2 was increased from 32.46 to 109.15 m2 g−1. This study validates the role of CO2 not only as expediting agent for the thermal cracking of volatile organic carbons (VOCs) but also as reacting agent with VOCs. This genuine influence of CO2 in pyrolysis of red pepper stalk led to enhanced generation of syngas, which consequently reduced tar production because VOCs evolving from devolatilization of biomass served as substrates for syngas via reaction between CO2 and VOCs. The enhanced generation of CO reached up to 3000 and 6000% at 600 and 690 °C, respectively, whereas 33.8% tar reduction in CO2 was identified at 600 °C.

Original languageEnglish
Pages (from-to)214-222
Number of pages9
JournalApplied Energy
Volume185
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Fingerprint

Agricultural wastes
Waste management
Organic carbon
pyrolysis
waste management
Tar
Pyrolysis
organic carbon
Fabrication
Recovery
tar
Biomass
Thermolysis
Exothermic reactions
Carbonization
biomass
Chemical properties
Thermogravimetric analysis
chemical property
surface area

Keywords

  • Bio-refinery
  • Biochar
  • Syngas
  • Thermo-chemical process
  • Waste-to-energy

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Energy(all)
  • Mechanical Engineering
  • Management, Monitoring, Policy and Law

Cite this

Pyrolysis process of agricultural waste using CO2 for waste management, energy recovery, and biochar fabrication. / Lee, Jechan; Yang, Xiao; Cho, Seong Heon; Kim, Jae Kon; Lee, Sang Soo; Tsang, Daniel C.W.; Ok, Yong Sik; Kwon, Eilhann E.

In: Applied Energy, Vol. 185, 01.01.2017, p. 214-222.

Research output: Contribution to journalArticle

Lee, Jechan ; Yang, Xiao ; Cho, Seong Heon ; Kim, Jae Kon ; Lee, Sang Soo ; Tsang, Daniel C.W. ; Ok, Yong Sik ; Kwon, Eilhann E. / Pyrolysis process of agricultural waste using CO2 for waste management, energy recovery, and biochar fabrication. In: Applied Energy. 2017 ; Vol. 185. pp. 214-222.
@article{3f9107eb4fed40b0bb98576e90484ff9,
title = "Pyrolysis process of agricultural waste using CO2 for waste management, energy recovery, and biochar fabrication",
abstract = "This study focused on the mechanistic understanding of CO2 in pyrolysis process of agricultural waste to achieve waste management, energy recovery, and biochar fabrication. In order to scrutinize the genuine role of CO2 in the biomass pyrolysis, all pyrogenic products such as syngas, pyrolytic oil (i.e., tar), and biochar generated from pyrolysis of red pepper stalk in N2 and CO2 were characterized. Thermo-gravimetric analysis confirmed that during the thermolysis of red pepper stalk, the magnitude of exothermic reaction in CO2 from 220 to 400 °C was substantially different from that in N2, resulting in the different extents of carbonization. The physico-chemical properties of biochar produced in CO2 were varied compared to biochar produced in N2. For example, the surface area of biochar produced in CO2 was increased from 32.46 to 109.15 m2 g−1. This study validates the role of CO2 not only as expediting agent for the thermal cracking of volatile organic carbons (VOCs) but also as reacting agent with VOCs. This genuine influence of CO2 in pyrolysis of red pepper stalk led to enhanced generation of syngas, which consequently reduced tar production because VOCs evolving from devolatilization of biomass served as substrates for syngas via reaction between CO2 and VOCs. The enhanced generation of CO reached up to 3000 and 6000{\%} at 600 and 690 °C, respectively, whereas 33.8{\%} tar reduction in CO2 was identified at 600 °C.",
keywords = "Bio-refinery, Biochar, Syngas, Thermo-chemical process, Waste-to-energy",
author = "Jechan Lee and Xiao Yang and Cho, {Seong Heon} and Kim, {Jae Kon} and Lee, {Sang Soo} and Tsang, {Daniel C.W.} and Ok, {Yong Sik} and Kwon, {Eilhann E.}",
year = "2017",
month = "1",
day = "1",
doi = "10.1016/j.apenergy.2016.10.092",
language = "English",
volume = "185",
pages = "214--222",
journal = "Applied Energy",
issn = "0306-2619",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Pyrolysis process of agricultural waste using CO2 for waste management, energy recovery, and biochar fabrication

AU - Lee, Jechan

AU - Yang, Xiao

AU - Cho, Seong Heon

AU - Kim, Jae Kon

AU - Lee, Sang Soo

AU - Tsang, Daniel C.W.

AU - Ok, Yong Sik

AU - Kwon, Eilhann E.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - This study focused on the mechanistic understanding of CO2 in pyrolysis process of agricultural waste to achieve waste management, energy recovery, and biochar fabrication. In order to scrutinize the genuine role of CO2 in the biomass pyrolysis, all pyrogenic products such as syngas, pyrolytic oil (i.e., tar), and biochar generated from pyrolysis of red pepper stalk in N2 and CO2 were characterized. Thermo-gravimetric analysis confirmed that during the thermolysis of red pepper stalk, the magnitude of exothermic reaction in CO2 from 220 to 400 °C was substantially different from that in N2, resulting in the different extents of carbonization. The physico-chemical properties of biochar produced in CO2 were varied compared to biochar produced in N2. For example, the surface area of biochar produced in CO2 was increased from 32.46 to 109.15 m2 g−1. This study validates the role of CO2 not only as expediting agent for the thermal cracking of volatile organic carbons (VOCs) but also as reacting agent with VOCs. This genuine influence of CO2 in pyrolysis of red pepper stalk led to enhanced generation of syngas, which consequently reduced tar production because VOCs evolving from devolatilization of biomass served as substrates for syngas via reaction between CO2 and VOCs. The enhanced generation of CO reached up to 3000 and 6000% at 600 and 690 °C, respectively, whereas 33.8% tar reduction in CO2 was identified at 600 °C.

AB - This study focused on the mechanistic understanding of CO2 in pyrolysis process of agricultural waste to achieve waste management, energy recovery, and biochar fabrication. In order to scrutinize the genuine role of CO2 in the biomass pyrolysis, all pyrogenic products such as syngas, pyrolytic oil (i.e., tar), and biochar generated from pyrolysis of red pepper stalk in N2 and CO2 were characterized. Thermo-gravimetric analysis confirmed that during the thermolysis of red pepper stalk, the magnitude of exothermic reaction in CO2 from 220 to 400 °C was substantially different from that in N2, resulting in the different extents of carbonization. The physico-chemical properties of biochar produced in CO2 were varied compared to biochar produced in N2. For example, the surface area of biochar produced in CO2 was increased from 32.46 to 109.15 m2 g−1. This study validates the role of CO2 not only as expediting agent for the thermal cracking of volatile organic carbons (VOCs) but also as reacting agent with VOCs. This genuine influence of CO2 in pyrolysis of red pepper stalk led to enhanced generation of syngas, which consequently reduced tar production because VOCs evolving from devolatilization of biomass served as substrates for syngas via reaction between CO2 and VOCs. The enhanced generation of CO reached up to 3000 and 6000% at 600 and 690 °C, respectively, whereas 33.8% tar reduction in CO2 was identified at 600 °C.

KW - Bio-refinery

KW - Biochar

KW - Syngas

KW - Thermo-chemical process

KW - Waste-to-energy

UR - http://www.scopus.com/inward/record.url?scp=84995644699&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84995644699&partnerID=8YFLogxK

U2 - 10.1016/j.apenergy.2016.10.092

DO - 10.1016/j.apenergy.2016.10.092

M3 - Article

AN - SCOPUS:84995644699

VL - 185

SP - 214

EP - 222

JO - Applied Energy

JF - Applied Energy

SN - 0306-2619

ER -