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Title: In-situ evaluation for upgrading of biomass over noble metal catalysts by isotopic tracing and NMR monitoring

Abstract

One of the key challenges in studying the upgrading processes for the conversion of biomass is developing an understanding of the underlying conversion mechanism at the atomic scale. This study proposed an innovative high pressure in situ NMR monitoring approach for an isotopic traced upgrading process, which demonstrated a powerful capability to identify key products and provide insights into the reaction structure. The investigations for ring opening of two basic model compounds – methylcyclopentane (MCP) and cyclohexane (CH) on Ir, Pt, Ru and Pd/γ-Al2O3 at 55 and 110 °C have been accomplished. For the study performed at 110 °C on Ir, Pt and Ru catalysts, the trend of H/D exchange rates were clearly dependent on the position on the ring with the highest exchange rate for the unhindered (or open side) and the lowest rate with the methyl group. However, Pd could perform almost equally efficient H/D exchanges for all sides, which may indicate that the “turnover” reactions could also occur on Pd. For both MCP and CH, Ru performed the most efficient H/D exchanges (C–H bond activation), and ring opened products were only observed with the Ru catalyst at 110 °C suggesting it is the most promising ring openingmore » catalyst.« less

Authors:
 [1];  [1];  [2];  [2]; ORCiD logo [3]
  1. Southeast Univ., Nanjing (China); Key Lab. of Energy Thermal Conversion and Control of Ministry of Education, Nanjing (China)
  2. Qingdao Univ. (China); Lab. of New Fiber Materials and Modern Textile, Qingdao (China)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1515639
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Analytical and Applied Pyrolysis
Additional Journal Information:
Journal Volume: 137; Journal Issue: C; Journal ID: ISSN 0165-2370
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Ben, Haoxi, Wu, Zhihong, Han, Guangting, Jiang, Wei, and Ragauskas, Arthur J. In-situ evaluation for upgrading of biomass over noble metal catalysts by isotopic tracing and NMR monitoring. United States: N. p., 2018. Web. https://doi.org/10.1016/j.jaap.2018.12.008.
Ben, Haoxi, Wu, Zhihong, Han, Guangting, Jiang, Wei, & Ragauskas, Arthur J. In-situ evaluation for upgrading of biomass over noble metal catalysts by isotopic tracing and NMR monitoring. United States. https://doi.org/10.1016/j.jaap.2018.12.008
Ben, Haoxi, Wu, Zhihong, Han, Guangting, Jiang, Wei, and Ragauskas, Arthur J. Tue . "In-situ evaluation for upgrading of biomass over noble metal catalysts by isotopic tracing and NMR monitoring". United States. https://doi.org/10.1016/j.jaap.2018.12.008. https://www.osti.gov/servlets/purl/1515639.
@article{osti_1515639,
title = {In-situ evaluation for upgrading of biomass over noble metal catalysts by isotopic tracing and NMR monitoring},
author = {Ben, Haoxi and Wu, Zhihong and Han, Guangting and Jiang, Wei and Ragauskas, Arthur J.},
abstractNote = {One of the key challenges in studying the upgrading processes for the conversion of biomass is developing an understanding of the underlying conversion mechanism at the atomic scale. This study proposed an innovative high pressure in situ NMR monitoring approach for an isotopic traced upgrading process, which demonstrated a powerful capability to identify key products and provide insights into the reaction structure. The investigations for ring opening of two basic model compounds – methylcyclopentane (MCP) and cyclohexane (CH) on Ir, Pt, Ru and Pd/γ-Al2O3 at 55 and 110 °C have been accomplished. For the study performed at 110 °C on Ir, Pt and Ru catalysts, the trend of H/D exchange rates were clearly dependent on the position on the ring with the highest exchange rate for the unhindered (or open side) and the lowest rate with the methyl group. However, Pd could perform almost equally efficient H/D exchanges for all sides, which may indicate that the “turnover” reactions could also occur on Pd. For both MCP and CH, Ru performed the most efficient H/D exchanges (C–H bond activation), and ring opened products were only observed with the Ru catalyst at 110 °C suggesting it is the most promising ring opening catalyst.},
doi = {10.1016/j.jaap.2018.12.008},
journal = {Journal of Analytical and Applied Pyrolysis},
number = C,
volume = 137,
place = {United States},
year = {2018},
month = {12}
}

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    Works referencing / citing this record:

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