Effect of leaching with 5-6 N H2SO4 on thermal kinetics of rice husk during pure silica recovery.

Autor:	Ali M; Institute of Advanced Materials, Bahauddin Zakariya University, Multan 60800, Pakistan., Ul Haq E; Department of Engineering for Innovations, University of Salento, Lecce 73100, Italy., Abdul Karim MR; Department of Applied Science and Technology, Politecnico di Torino, Italy., Ahmed S; Department of Engineering for Innovations, University of Salento, Lecce 73100, Italy., Ibrahim A; Institute of Advanced Materials, Bahauddin Zakariya University, Multan 60800, Pakistan., Ahmad W; Institute of Advanced Materials, Bahauddin Zakariya University, Multan 60800, Pakistan., Baig WM; Institute of Advanced Materials, Bahauddin Zakariya University, Multan 60800, Pakistan.
Jazyk:	angličtina
Zdroj:	Journal of advanced research [J Adv Res] 2016 Jan; Vol. 7 (1), pp. 47-51. Date of Electronic Publication: 2015 Jan 28.
DOI:	10.1016/j.jare.2015.01.007
Abstrakt:	Rice husk is a potential source for renewable energy and silica. To extract the maximum amount of silica, usually the rice husk is treated with strong acids that burn the organic part leaving behind a black residue. In this research, sulfuric acid is used as an oxidizing agent. Efforts are focused to find out more about the behavior of acid-treated rice husk by using thermal exposure, and results are compared with results for raw rice husk which is thermally exposed but not acid treated. Reaction ratio of rice husk combustion and energy of activation were calculated using the thermogravimetric data. Acid treatment was found influential in initiating degradation earlier compared to raw husk and an overall increase in value of activation energy was observed when heating rate was increased.
Databáze:	MEDLINE
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