Journal
CARBON
Volume 170, Issue -, Pages 580-588Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.08.053
Keywords
n-Butanol conversion; Oxidative dehydrogenation; Carbon catalysis; Oxygen functionalities; Reaction mechanism and kinetics
Funding
- NSFC of China [21761132010, 91645114, 21573256]
- Youth Innovation Promotion Association, CAS, China
- Natural Science Foundation of Liaoning Province of China [2020-YQ-02]
- Deutsche Bundesstiftung Umwelt (DBU)
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [ET-101/13-1]
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Catalytic conversion of n-butanol to high-value-added product is considered as a highly important route towards biomass derived fine chemicals. The present work reports the applications of non-metallic multi-walled carbon nanotube (CNT) as bifunctional catalysts for oxygen assisted n-butanol conversion reactions. Oxidative dehydrogenation (ODH) and dehydration of n-butanol on CNT yielded aldehyde and alkene compounds via redox and acid catalytic routes, respectively. CNT exhibited high activity (over 50% n-butanol conversion) and stability (over 120 h) under gentle reaction conditions (<330 degrees C), which are competitive to conventional metal-based catalysts. Carboxylic acid groups were identified as catalytic active sites for dehydration reactions via linking the reactivity (kinetic parameters) with the surface composition and structural information of CNT catalysts. The redox activity could be related to ketonic carbonyl groups, and interestingly the intrinsic ODH catalytic activity is also influenced by degree of graphitization for CNT materials. (C) 2020 Elsevier Ltd. All rights reserved.
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