Pyrolysis of Waste Castor Seed Cake: A Thermo-Kinetics Study

European Journal of Sustainable Development Research

Thallada Bhaskar¹  Abdullahi Muhammad Sokoto² 

[1] Indian Institute of Petroleum Dehradun, Dehradun, Uttarakhand, INDIA;Usmanu Danfodiyo University, Department of Pure and Applied Chemistry, Sokoto, NIGERIA

关键词: pyrolysis;    heating rates;    devolatilization;    kinetic models;    thermogravimetry;   

DOI  :  10.20897/ejosdr/81642

学科分类：社会科学、人文和艺术（综合）

来源: Lectito Journals

【 摘 要 】

Biomass pyrolysis is a thermo-chemical conversion process that is of both industrial and ecological importance. The efficient chemical transformation of waste biomass to numerous products via pyrolysis reactions depends on process kinetic rates; hence the need for kinetic models to best design and operate the pyrolysis. Also, for an efficient design of an environmentally sustainable pyrolysis process of a specific lignocellulosic waste, a proper understanding of its thermo-kinetic behavior is imperative. Thus, pyrolysis kinetics of castor seed de-oiled cake (Ricinus communis) using thermogravimetric technique was studied. The decomposition of the cake was carried out in a nitrogen atmosphere with a flow rate of 100mL min-1 from ambient temperature to 900 °C. The results of the thermal profile showed moisture removal and devolatilization stages, and maximum decomposition of the cake occurred at a temperature of 200-400 °C. The kinetic parameters such as apparent activation energy, pre-exponential factor, and order of reaction were determined using Friedman (FD), Kissinger-Akahira-Sunose (KAS), and Flynn-Wall-Ozawa (FWO) kinetic models. The average apparent activation energy values of 124.61, 126.95 and 129.80 kJmol-1 were calculated from the slopes of the respective models. The apparent activation energy values obtained depends on conversion, which is an evidence of multi-step kinetic process during the pyrolytic decomposition of the cake. The kinetic data would be of immense benefit to model, design and develop a suitable thermo-chemical system for the conversion of waste de-oil cake to energy carrier.

【 授权许可】

CC BY