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Dehydrogenation of bioethanol using Cu nanoparticles supported on N‐doped ordered mesoporous carbon

DOI: 10.1002/cctc.202000883 DOI Help

Authors: Rouzana Pulikkal Thumbayil (Technical University of Denmark) , David Benjamin Christensen (Technical University of Denmark) , Jerrik Mielby (Technical University of Denmark) , Søren Kegnæs (Technical University of Denmark)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemcatchem , VOL 12 , PAGES 5644 - 5655

State: Published (Approved)
Published: November 2020

Abstract: Carbon supported Cu nanoparticles have a remarkable selectivity towards the catalytic dehydrogenation of bioethanol to acetaldehyde, which is an interesting alternative to the preparation from ethylene. In this work, we prepared a series of catalysts comprised of Cu nanoparticles supported on N‐doped ordered mesoporous carbons to investigate the catalytic effect of nitrogen content. Our study shows that N‐doping has a significant effect on the dispersion of Cu nanoparticles and that the highest content of N results in the highest activity. Furthermore, we show that the combined effects of strong metal‐support interactions and nano‐confinement is an effective method to prevent thermal and steam induced sintering. In contrast, we find no evidence that N‐doping activates the substrate or change the rate‐determining step. At 260 °C, the best catalyst results in >99 % selectivity and a site‐time yield of 175 molacetaldehyde/molCu/h. Under these conditions, the catalysts are stable for more than 12 h using an aqueous solution of 10 % ethanol as feed.

Journal Keywords: Dehydrogenation; N-doping; Heterogeneous catalysis; DRIFTS; Cu nanoparticles

Diamond Keywords: Biofuel

Subject Areas: Chemistry, Energy

Diamond Offline Facilities: Electron Physical Sciences Imaging Centre (ePSIC)
Instruments: E02-JEM ARM 300CF

Added On: 19/04/2021 22:53

Discipline Tags:

Bioenergy Earth Sciences & Environment Biotechnology Sustainable Energy Systems Energy Climate Change Physical Chemistry Catalysis Chemistry Engineering & Technology Organic Chemistry

Technical Tags:

Microscopy Electron Microscopy (EM) Transmission Electron Microscopy (TEM)