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Title: Understanding the Impact of Hydrogen Activation by SrCe0.8Zr0.2O3-δ Perovskite Membrane Material on Direct Non-Oxidative Methane Conversion

Journal Article · · Frontiers in Chemistry
 [1];  [1];  [1];  [2];  [2];  [1]
  1. University of Maryland, College Park, MD (United States)
  2. SINOPEC, Beijing (China)

Direct non-oxidative methane conversion (DNMC) converts methane (CH4) in one step to olefin and aromatic hydrocarbons and hydrogen (H2) co-product. Membrane reactors comprising methane activation catalysts and H2-permeable membranes can enhance methane conversion by in situ H2 removal via Le Chatelier's principle. Rigorous description of H2 kinetic effects on both membrane and catalyst materials in the membrane reactor, however, has been rarely studied. In this work, we report the impact of hydrogen activation by hydrogen-permeable SrCe0.8Zr0.2O3-δ(SCZO) perovskite oxide material on DNMC over an iron/silica catalyst. The SCZO oxide has mixed ionic and electronic conductivity and is capable of H2 activation into protons and electrons for H2 permeation. In the fixed-bed reactor packed with a mixture of SCZO oxide and iron/silica catalyst, stable and high methane conversion and low coke selectivity in DNMC was achieved by co-feeding of H2 in methane stream. The characterizations show that SCZO activates H2 to favor “soft coke” formation on the catalyst. The SCZO could absorb H2in situ to lower its local concentration to mitigate the reverse reaction of DNMC in the tested conditions. The co-existence of H2 co-feed, SCZO oxide, and DNMC catalyst in the present study mimics the conditions of DNMC in the H2-permeable SCZO membrane reactor. The findings in this work offer the mechanistic understanding of and guidance for the design of H2-permeable membrane reactors for DNMC and other alkane dehydrogenation reactions.

Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); National Science Foundation (NSF)
Grant/Contract Number:
FE0031877; CBET-1928325
OSTI ID:
1904841
Journal Information:
Frontiers in Chemistry, Vol. 9; ISSN 2296-2646
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

References (50)

Materials challenges toward proton-conducting oxide fuel cells: a critical review journal January 2010
Modelling of the decomposition of methane at 1273 K in a plug flow reactor at low conversion journal June 1993
Methane-to-aromatics in a gas recycle methane reactor/hydrogen membrane separator journal April 2021
Method for estimating ionicities of oxides using O1s photoelectron spectra journal September 2015
Proton-Conducting Oxides journal August 2003
The pyrolysis of natural gas: A study of carbon deposition and the suitability of reactor materials journal December 2018
Dual utilization of greenhouse gases to produce C2+ hydrocarbons and syngas in a hydrogen-permeable membrane reactor journal February 2020
Carbonaceous Deposition on Mo/HMCM-22 Catalysts for Methane Aromatization: A TP Technique Investigation journal June 2002
Structure and Density of Mo and Acid Sites in Mo-Exchanged H-ZSM5 Catalysts for Nonoxidative Methane Conversion journal July 1999
Thermal coupling of methane journal January 1994
Synthesis and hydrogen permeation properties of membranes based on dense SrCe0.95Yb0.05O3− thin films journal May 2002
Reaction-transport simulations of non-oxidative methane conversion with continuous hydrogen removal — homogeneous–heterogeneous reaction pathways journal March 2001
Sol-gel synthesis of nanocrystalline fayalite (Fe2SiO4) journal March 2012
Non-oxidative methane dehydroaromatization reaction over highly active $${\upalpha }$$ α - $$\hbox {MoC}_{1{-}\mathrm{x} }$$ MoC 1 - x ZSM-5 derived from pretreatment journal March 2018
Raman and X-ray Photoelectron Spectroscopy Study of CeO 2 −ZrO 2 and V 2 O 5 /CeO 2 −ZrO 2 Catalysts journal February 2003
Direct Nonoxidative Methane Conversion in an Autothermal Hydrogen‐Permeable Membrane Reactor journal October 2021
Surface Heterogeneity of SiO 2 Polymorphs: An XPS Investigation of α-Quartz and α-Cristobalite journal November 2014
Sulfated hafnia as a support for Mo oxide: A novel catalyst for methane dehydroaromatization journal March 2020
Systematic XPS studies of metal oxides, hydroxides and peroxides journal January 2000
Improved benzene production from methane dehydroaromatization over Mo/HZSM-5 catalysts via hydrogen-permselective palladium membrane reactors journal January 2015
Direct methane conversion routes to chemicals and fuels journal August 2011
Effect of hydrogen concentration on graphene synthesis using microwave-driven plasma-mediated methane cracking journal March 2019
Microwave-Driven Plasma-Mediated Methane Cracking: Product Carbon Characterization journal November 2018
Interactions of CO2 and CO at fractional atmosphere pressures with iron and iron oxide surfaces: one possible mechanism for surface contamination? journal January 2002
Thermal coupling of methane, experimental investigations on coke deposits journal January 1995
High-resolution valence-band XPS spectra of the nonconductors quartz and olivine journal November 2005
Catalytic conversion of methane to more useful chemicals and fuels: a challenge for the 21st century journal December 2000
Direct conversion of methane under nonoxidative conditions journal May 2003
Hydrogen-Permeable Tubular Membrane Reactor: Promoting Conversion and Product Selectivity for Non-Oxidative Activation of Methane over an Fe©SiO 2 Catalyst journal November 2016
X-ray Photoelectron Spectroscopic Analysis of Si Nanoclusters in SiO2 Matrix journal December 2005
Catalytic aromatization of methane journal January 2014
Methane dehydroaromatization over Mo-modified H-MFI for gas to liquid catalysts journal January 2009
Nature of the use of adventitious carbon as a binding energy standard journal May 1995
Dehydrogenation and aromatization of methane under non-oxidizing conditions journal January 1993
Methane Nonoxidative Aromatization over Ru−Mo/HZSM-5 at Temperatures up to 973 K in a Palladium−Silver/Stainless Steel Membrane Reactor journal January 2003
Direct conversion of methane to aromatics in a catalytic co-ionic membrane reactor journal August 2016
Promotional Effect of Cr in Sulfated Zirconia‐Based Mo Catalyst for Methane Dehydroaromatization journal August 2019
Review of proton conductors for hydrogen separation journal June 2006
Effective Coke Removal in Methane to Benzene (MTB) Reaction on Mo/HZSM-5 Catalyst by H2 and H2O Co-addition to Methane journal October 2005
The chemical nature of carbonaceous deposits and their role in methane dehydro-aromatization on Mo/MCM-22 catalysts journal September 2002
Methane dehydroaromatization over molybdenum supported on sulfated zirconia catalysts journal April 2019
Characterization of Coke on a Pt-Re/γ-Al 2 O 3 Re-Forming Catalyst: Experimental and Theoretical Study journal January 2017
Direct, Nonoxidative Conversion of Methane to Ethylene, Aromatics, and Hydrogen journal May 2014
Promotion effects of Pt and Rh on catalytic performances of Mo/HZSM-5 and Mo/HMCM-22 in selective methane-to-benzene reaction journal August 2006
Characterization of the coke formed on reforming catalysts by laser raman spectroscopy journal June 1985
Improved Metal-Support Interaction in Pt/CeO2/SiO2 Catalysts after Zinc Addition journal August 2002
A clue to exploration of the pathway of coke formation on Mo/HZSM-5 catalyst in the non-oxidative methane dehydroaromatization at 1073K journal July 2014
Ethylene production by direct conversion of methane over isolated single active centers journal September 2021
Design and optimization of catalysts and membrane reactors for the non-oxidative conversion of methane journal November 2002
Satellite structure in the X-ray photoelectron spectra of some binary and mixed oxides of lanthanum and cerium journal January 1976