Volume 38, Issue 2 pp. 178-184
Comprehensive Report

The Promotion Effect of NaCl on the Conversion of Xylose to Furfural

Zheng Li

Zheng Li

Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064 China

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Yiping Luo

Yiping Luo

College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, 610059 China

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Zhicheng Jiang

Zhicheng Jiang

National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, Sichuan, 610065 China

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Qianying Fang

Qianying Fang

Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064 China

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Changwei Hu

Corresponding Author

Changwei Hu

Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064 China

E-mail: [email protected]Search for more papers by this author
First published: 15 December 2019
Citations: 25
Dedicated to Professor Mingyuan He on the occasion of his 80th birthday.

Summary of main observation and conclusion

In this work, the promotion effect of NaCl on the conversion of xylose to furfural in H2O was studied. It was found that xylose conversion and furfural yield increased with NaCl concentration. NaCl decreased the pH of the solution providing H+ for the acid catalytic dehydration of xylose. The formation of oligomers was determined by GPC and ESI-MS in the initial stage of reaction, especially at low temperature. Excess NaCl promoted the formation of humins in the late stage of the reaction. NaCl could also change the decomposition route of formic acid. Meanwhile, NaCl had the ability of phase separation. Combining these effects with organic solvent during the reaction could inhibit the formation of humins and increase the yield of furfural. In NaCl-H2O-THF biphasic system without other catalyst, the optimal furfural yield of 76.7% and selectivity of 77.6% were achieved at 463 K in 2 h.

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