title: Effect of leaching with 5-6 N H2SO4 on thermal kinetics of rice husk during pure silica recovery.
abstract: 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.
authors: Institute of Advanced Materials, Bahauddin Zakariya University, Multan 60800, Pakistan.
authors: Muhammad
authors: M
authors: Ali
authors: Department of Engineering for Innovations, University of Salento, Lecce 73100, Italy.
authors: Ehsan
authors: E
authors: Ul Haq
authors: Department of Applied Science and Technology, Politecnico di Torino, Italy.
authors: Muhammad R
authors: MR
authors: Abdul Karim
authors: Department of Engineering for Innovations, University of Salento, Lecce 73100, Italy.
authors: Sajjad
authors: S
authors: Ahmed
authors: Institute of Advanced Materials, Bahauddin Zakariya University, Multan 60800, Pakistan.
authors: Ather
authors: A
authors: Ibrahim
authors: Institute of Advanced Materials, Bahauddin Zakariya University, Multan 60800, Pakistan.
authors: Waheed
authors: W
authors: Ahmad
authors: Institute of Advanced Materials, Bahauddin Zakariya University, Multan 60800, Pakistan.
authors: Waqas M
authors: WM
authors: Baig
keywords: Acid leaching; Flynn and Wall expression; Rice husk; Thermal kinetics