TY - JOUR
T1 - Analysis of Pyrolysis Index and Reaction Mechanism in Microwave-Assisted ex-situ Catalytic Co-Pyrolysis of Agro-residual and Plastic Wastes.
AU - Suriapparao, Dadi V
AU - Gautam, Ribhu
AU - Rao Jeeru, Lakshmana
N1 - KAUST Repository Item: Exported on 2022-05-26
Acknowledgements: The corresponding author would like to thank the Pandit Deendayal Energy University for providing the faculty seed grant for the development of the microwave pyrolysis experimental facility.
PY - 2022/5/21
Y1 - 2022/5/21
N2 - Catalytic and non-catalytic microwave-assisted co-pyrolysis of biomass with plastics was performed to understand the interactions. An ex-situ configuration was adopted for performing catalytic co-pyrolysis experiments with ZSM-5 as a catalyst. Co-pyrolysis promoted cracking of vapors resulting in enhanced gas yields. ZSM-5 further enhanced the secondary cracking which resulted in low oil yields. The oil fraction collected from the pyrolysis of plastics was rich in hydrocarbons, whereas biomass pyrolysis led to the formation of oxygenated compounds in the oil. A plausible reaction mechanism scheme is proposed to understand the formation of major pyrolysis products via different pathways during different pyrolysis processes investigated. Also, a new parameter, the pyrolysis index is introduced to understand the pyrolysis intensity by utilizing the feedstock conversion, pyrolysis time, heating value, mass of feedstock, and energy consumption. The value of the pyrolysis index was found to be higher for plastics pyrolysis than biomass pyrolysis. Co-pyrolysis further increased the pyrolysis index due to the synergistic interactions.
AB - Catalytic and non-catalytic microwave-assisted co-pyrolysis of biomass with plastics was performed to understand the interactions. An ex-situ configuration was adopted for performing catalytic co-pyrolysis experiments with ZSM-5 as a catalyst. Co-pyrolysis promoted cracking of vapors resulting in enhanced gas yields. ZSM-5 further enhanced the secondary cracking which resulted in low oil yields. The oil fraction collected from the pyrolysis of plastics was rich in hydrocarbons, whereas biomass pyrolysis led to the formation of oxygenated compounds in the oil. A plausible reaction mechanism scheme is proposed to understand the formation of major pyrolysis products via different pathways during different pyrolysis processes investigated. Also, a new parameter, the pyrolysis index is introduced to understand the pyrolysis intensity by utilizing the feedstock conversion, pyrolysis time, heating value, mass of feedstock, and energy consumption. The value of the pyrolysis index was found to be higher for plastics pyrolysis than biomass pyrolysis. Co-pyrolysis further increased the pyrolysis index due to the synergistic interactions.
UR - http://hdl.handle.net/10754/678230
UR - https://linkinghub.elsevier.com/retrieve/pii/S0960852422006861
U2 - 10.1016/j.biortech.2022.127357
DO - 10.1016/j.biortech.2022.127357
M3 - Article
C2 - 35605781
SN - 0960-8524
SP - 127357
JO - Bioresource technology
JF - Bioresource technology
ER -
