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

LI Zhen-hua; CHEN Xiao-bing; CHUN Yuan; WU Xing-cai

Volume 46 Issue 9

Sep. 2018

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Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(9): 1079-1086

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.

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.

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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

Funds:

the National Natural Science Foundation of China 21573104

the National Natural Science Foundation of China 21673108

More Information

Corresponding author: CHUN Yuan, E-mail:ychun@nju.edu.cn
Received Date: 2018-06-05
Rev Recd Date: 2018-07-12

Available Online: 2021-01-23

Publish Date: 2018-09-10

Abstract

Abstract

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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References(18)

References

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