Generation of biofuel via catalytic pyrolysis of agricultural wastes

Fairous S. Teknologi MARA Univ., . and Maryam H., . and Rusnah S., . (2009) Generation of biofuel via catalytic pyrolysis of agricultural wastes. [Proceedings Paper]

Agricultural wastes are one form of biomass which are readily available but largely not fully utilized. It was estimated that over nine million tonnes of rice waste were generated annually from the rice milling industry. Normally rice wastes are used as animal feed composting or burned as thermal energy for drying purposes; the unused portion is just burned in the fields. Rice wastes have the potential for utilization as energy and other applications. Pyrolysis is a new technology which could convert biomass into energy. Thermal degradation produces three main products: char solid bio-oil liquid and gas. Co-catalytic pyrolysis of different blends of rice husk and rice straw weight percent basis was carried out at varying operating temperatures in a fixed-bed reactor. The study investigated the influence of catalysts on the production of high bio-oil yield. The experimental results showed that the bio-oil yields increased in the presence of zeolite catalyst and decreased in the presence of sodium carbonate compared with non-catalysed reaction. Proximate and ultimate analyses of the rice husk and rice straw were carried out. The calorific values of rice straw and rice husk alone were 14.20 and 15.32 MJ kg-1 respectively while the 70: 30 weight percent basis blend of rice husk and rice straw showed a value of 14.90 MJ kg-1 which was higher than the value for the original rice straw but lower than that for the original rice husk. The chemical compositions of bio-oil from catalytic pyrolysis were determined using GC-MS.

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Abstract

Agricultural wastes are one form of biomass which are readily available but largely not fully utilized. It was estimated that over nine million tonnes of rice waste were generated annually from the rice milling industry. Normally rice wastes are used as animal feed composting or burned as thermal energy for drying purposes; the unused portion is just burned in the fields. Rice wastes have the potential for utilization as energy and other applications. Pyrolysis is a new technology which could convert biomass into energy. Thermal degradation produces three main products: char solid bio-oil liquid and gas. Co-catalytic pyrolysis of different blends of rice husk and rice straw weight percent basis was carried out at varying operating temperatures in a fixed-bed reactor. The study investigated the influence of catalysts on the production of high bio-oil yield. The experimental results showed that the bio-oil yields increased in the presence of zeolite catalyst and decreased in the presence of sodium carbonate compared with non-catalysed reaction. Proximate and ultimate analyses of the rice husk and rice straw were carried out. The calorific values of rice straw and rice husk alone were 14.20 and 15.32 MJ kg-1 respectively while the 70: 30 weight percent basis blend of rice husk and rice straw showed a value of 14.90 MJ kg-1 which was higher than the value for the original rice straw but lower than that for the original rice husk. The chemical compositions of bio-oil from catalytic pyrolysis were determined using GC-MS.

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Item Type:	Proceedings Paper
Additional Information:	3 tables
AGROVOC Term:	Agricultural wastes
AGROVOC Term:	Biomass
AGROVOC Term:	Catalysts
AGROVOC Term:	Catalytic activity
AGROVOC Term:	Pyrolysis
AGROVOC Term:	Renewable energy
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:14
URI:	http://webagris.upm.edu.my/id/eprint/11443

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