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Open AccessArticle

Influence of CeO2 Addition to Ni–Cu/HZSM-5 Catalysts on Hydrodeoxygenation of Bio-Oil

1
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China
2
Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province, Zhengzhou 450001, Henan, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(6), 1257; https://doi.org/10.3390/app9061257
Received: 25 February 2019 / Revised: 16 March 2019 / Accepted: 22 March 2019 / Published: 26 March 2019
(This article belongs to the Section Energy)
Hydrodeoxygenation (HDO) of bio-oil is a method of bio-oil upgrading. In this paper, x%CeO2–Ni–Cu/HZSM-5 (x = 5, 15, and 20) was synthesized as an HDO catalyst by the co-impregnation method. The HDO performances of x%CeO2–Ni–Cu/HZSM-5 (x = 5, 15, and 20) in the reaction process was evaluated and compared with Ni–Cu/HZSM-5 by the property and the yield of upgrading oil. The difference of the chemical composition between bio-oil and upgrading oil was evaluated by GC-MS. The results showed that the addition of CeO2 decreased the water and oxygen contents of upgrading oil, increased the high heating value, reduced acid content, and increased hydrocarbon content. When the CeO2 addition was 15%, the yield of upgrading reached the maximum, from 33.9 wt% (Ni–Cu/HZSM-5) to 47.6 wt% (15%CeO2–Ni–Cu/HZSM-5). The catalytic activities of x%CeO2–Ni–Cu/HZSM-5 (x = 5, 15, and 20) and Ni–Cu/HZSM-5 were characterized by XRD, N2 adsorption–desorption, NH3-Temperature-Programmed Desorption, H2-Temperature-Programmed Reaction, TEM, and XPS. The results showed that the addition of CeO2 increased the dispersion of active metal Ni, reduced the bond between the active metal and the catalyst support, increased the ratio of Bronsted acid to total acids, and decreased the reduction temperature of NiO. When the CeO2 addition was 15%, the activity of catalyst reached the best. Finally, the carbon deposition resistance of deactivated catalysts was investigated by a Thermogravimetric (TG) analysis, and the results showed that the addition of CeO2 could improve the carbon deposition resistance of catalysts. When the CeO2 addition was 15%, the coke deposition decreased from 41 wt% (Ni–Cu/HZSM-5) to 14 wt% (15%CeO2–Ni–Cu/HZSM-5). View Full-Text
Keywords: Ni–Cu/HZSM-5; CeO2; bio-oil; hydrodeoxygenation Ni–Cu/HZSM-5; CeO2; bio-oil; hydrodeoxygenation
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MDPI and ACS Style

Wang, W.; Zhang, C.; Chen, G.; Zhang, R. Influence of CeO2 Addition to Ni–Cu/HZSM-5 Catalysts on Hydrodeoxygenation of Bio-Oil. Appl. Sci. 2019, 9, 1257. https://doi.org/10.3390/app9061257

AMA Style

Wang W, Zhang C, Chen G, Zhang R. Influence of CeO2 Addition to Ni–Cu/HZSM-5 Catalysts on Hydrodeoxygenation of Bio-Oil. Applied Sciences. 2019; 9(6):1257. https://doi.org/10.3390/app9061257

Chicago/Turabian Style

Wang, Wenhe; Zhang, Changsen; Chen, Guanghui; Zhang, Ruiqin. 2019. "Influence of CeO2 Addition to Ni–Cu/HZSM-5 Catalysts on Hydrodeoxygenation of Bio-Oil" Appl. Sci. 9, no. 6: 1257. https://doi.org/10.3390/app9061257

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