Citation: LI Zhen-hua, CHEN Xiao-bing, CHUN Yuan, WU Xing-cai. Active species and deactivation behavior of Al₂O₃ supported KNO₃ catalyst in the synthesis of biodiesel via transesterification of soybean oil[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(9): 1079-1086. shu

Active species and deactivation behavior of Al₂O₃ supported KNO₃ catalyst in the synthesis of biodiesel via transesterification of soybean oil

Key Laboratory of Mesoscopic Chemistry of Minister of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China

Corresponding author: CHUN Yuan, ychun@nju.edu.cn
Received Date: 5 June 2018
Revised Date: 12 July 2018

Fund Project: The project was supported by the National Natural Science Foundation of China (21573104, 21673108) and the Testing Fund of Nanjing Universitythe National Natural Science Foundation of China 21573104the National Natural Science Foundation of China 21673108

Figures(7)

Al₂O₃ supported KNO₃ (KNO₃/Al₂O₃) catalyst was prepared and characterized by XRD, DRIFT, nitrogen adsorption, ICP and basicity titration. The catalytic performance of KNO₃/Al₂O₃ in the transesterification of soybean oil with methanol for biodiesel production was investigated; especially, the nature of active species and deactivation behavior during the reaction was considered. The results illustrate that KNO₃ on the surface of Al₂O₃ is completely decomposed after calcination at 873 K, forming potassium aluminate. During the transesterification reaction, aluminate as the active species in KNO₃/Al₂O₃ is gradually dissolved out, which is responsible for the high catalytic activity of KNO₃/Al₂O₃. The biodiesel and glycerol products formed have a great influence on the catalyst activity and the catalyst deactivation is mainly ascribed to the saponification of biodiesel with the active species.
- potassium nitrate,
- supported solid base,
- biodiesel,
- dissolution,
- deactivation
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Active species and deactivation behavior of Al2O3 supported KNO3 catalyst in the synthesis of biodiesel via transesterification of soybean oil

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Active species and deactivation behavior of Al₂O₃ supported KNO₃ catalyst in the synthesis of biodiesel via transesterification of soybean oil