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Ni-Ti Intercalated and Supported Bentonite for Selective Hydrogenation of Cinnamaldehyde |
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| Authors: | Yiyuan Xu Dr Tongming Su Dr Xuan Luo Prof Zuzeng Qin Prof?Dr Hongbing Ji |
| Institution: | 1. School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, 100 Daxue Road, Nanning, 530004 P. R. China
Contribution: Data curation (lead), Formal analysis (equal), ?Investigation (equal), Methodology (equal), Writing - original draft (equal);2. School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, 100 Daxue Road, Nanning, 530004 P. R. China Contribution: Conceptualization (lead), ?Investigation (equal), Methodology (equal);3. School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, 100 Daxue Road, Nanning, 530004 P. R. China Contribution: ?Investigation (equal), Methodology (equal);4. School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, 100 Daxue Road, Nanning, 530004 P. R. China |
| Abstract: | Ni-Ti intercalated bentonite catalysts (Ni-Ti-bentonite) and Ni-TiO2 supported bentonite catalysts (Ni-TiO2/bentonite) were prepared, and the effects of Ni-Ti supported and intercalated bentonite on the selective hydrogenation of cinnamaldehyde were investigated. Ni-Ti intercalated bentonite enhanced the Brønsted acid sites strength, decreased the acid amount and Lewis's acid sites strength, which inhibited the activation of the C=O bond and contributed to selective hydrogenation of the C=C bond. When Ni-TiO2 was supported on bentonite, the acid amount and Lewis's acid strength of the catalyst increased, providing additional adsorption sites and increased the acetals byproducts. Due to the higher surface area, mesoporous volume, and suitable acidity, compared with Ni-TiO2/bentonite in methanol solvent, 2 MPa, 120 °C for 1 h, Ni-Ti-bentonite exhibited a higher cinnamaldehyde (CAL) conversion of 98.8 %, as well as a higher hydrocinnamaldehyde (HCAL) selectivity of 95 %, and no acetals were found in the product. |
| Keywords: | cinnamaldehyde KBH4 reduction Lewis acid sites Ni-TiO2 intercalated bentonite selective hydrogenation |