Mechanistic and kinetic study of the hydrothermal treatment of paunch waste

Hedayati Marzbali, M and Saberi, A and Halder, P and Paz-Ferreiro, J and Dasappa, S and Shah, K (2022) Mechanistic and kinetic study of the hydrothermal treatment of paunch waste. In: Chemical Engineering Research and Design, 177 . pp. 541-553.

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Abstract

Hydrothermal carbonization of paunch waste, the main wet waste generated at abattoirs, was investigated in batch mode. A mass loss of 58 was achieved at 240 °C in a flash experiment, whereas prolonging the reaction to 4 h increased it to 79, indicating the ability of a hydrothermal medium for managing this wet waste. XRD analysis suggested that the amorphous portion of paunch waste was readily hydrolysed, whereas crystalline cellulose I was retained. Longer holding time partially destroyed the formed porous structure and halved the BET surface area from 68.1 to 37 m2 g�1. Aromatic, cyclic, and phenolic compounds were found in light bio-oil, while heavy bio-oil contained long-chain fatty acids derivatives. A reaction network was suggested containing 12 reaction pathways during the process, and lumped kinetic modelling was performed reasonably accurately. The techno-economic analysis also revealed that with a solids content of 3 wt., only processing time as short as 5 min can promise a positive net present value of 8.3 million, while longer residence times led to negative values. © 2021

Item Type:	Journal Article
Publication:	Chemical Engineering Research and Design
Publisher:	Institution of Chemical Engineers
Additional Information:	The copyright for this article belongs to Institution of Chemical Engineers
Keywords:	Carbonization; Economic analysis; Fatty acids; Kinetics; Thermochemistry; Waste treatment, Bio-oils; Holding time; Holding time effect; Hydrothermal carbonization; Kinetic models; Mechanistic studies; Paunch waste; Reaction network; Time effect; Time-effect, Kinetic theory
Department/Centre:	Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited:	21 Dec 2021 05:48
Last Modified:	21 Dec 2021 05:48
URI:	http://eprints.iisc.ac.in/id/eprint/70668

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