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Title: Catalytic co-aromatization of ethanol and methane

This study demonstrates the technical feasibility of simultaneously converting ethanol and methane into liquid hydrocarbons at mild reaction conditions (400 °C and 1 atm) over silver and/or zinc modified zeolite catalysts. After GC-MS analysis, it is worth noting that aromatics are the major compounds contained in the liquid product collected from the run when 1%Ag/ZSM-5, particularly after H 2 pretreatment, is charged. Compared to the performance exhibited from the run with pure HZSM-5 support engaged, Ag addition into the HZSM-5 framework favors aromatics formation, which might be closely associated with better Ag dispersion and more abundance of strong surface acidic sites where aromatization might take place while Zn loading exerts a detrimental effect on the production of aromatics but promotes the ether generation possibly through dehydration reaction. Referred to that from its N 2 counterpart, the increased aromatics formation of the collected liquid product when methane is present indicates that methane existence might facilitate ethanol aromatization. Moreover, combined with the increased carbon number in the formed aromatics from CH 4 run when H 2 run is referred and zero liquid formation from CH 4-alone test as well as more prominent endothermic feature of methane run and more importantly the notablymore » increased 13C signals in 13C NMR spectra of the liquid product collected during ethanol conversion under 13CH 4 environment, all the observations suggest that methane might be activated nonoxidatively and converted into higher hydrocarbons, preferentially into aromatics if suitable catalyst is charged under the assistance of co-existing oxygenated hydrocarbon. Lastly, the reported synergetic effect could potentially lead to the more economic utilization of abundant natural gas and cellulosic ethanol.« less
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ; ORCiD logo [1]
  1. Univ. of Calgary, Calgary, AB (Canada)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Univ. of Alberta, Edmonton, AB (Canada)
  4. National Institute for Nanotechnology, Edmonton, AB (Canada)
Publication Date:
Report Number(s):
NREL/JA-5100-67709
Journal ID: ISSN 0926-3373
Grant/Contract Number:
AC36-08GO28308
Type:
Accepted Manuscript
Journal Name:
Applied Catalysis. B, Environmental
Additional Journal Information:
Journal Volume: 198; Journal Issue: C; Journal ID: ISSN 0926-3373
Publisher:
Elsevier
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; methane; ethanol; catalyst; aromatization; ZSM-5
OSTI Identifier:
1339508