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Title: Influence of propylene glycol/nitrates ratio on microwave-assisted combustion synthesis of CuO-ZnO-Al2O3 nanocatalyst: Structural and catalytic properties toward hydrogen production from methanol

Abstract

Highlights: • Applicability of propylene glycol in synthesis of CuO/ZnO/Al{sub 2}O{sub 3} via combustion method. • Addressing the influence of fuel to nitrates ratio on catalytic properties and performance. • Synthesis of stable and active CuO/ZnO/Al{sub 2}O{sub 3} nanocatalyst in methanol to hydrogen. • Achievement of complete conversion at 260 °C by choosing appropriate amount of fuel. • Decrease of CO production by applying suitable fuel/nitrates ratio. - Abstract: A series of CuO-ZnO-Al{sub 2}O{sub 3} nanocatalysts were fabricated by microwave-assisted combustion method to investigate the role of propylene glycol/nitrates ratio. XRD, FESEM, FTIR, EDX, BET and TG techniques were applied to study the physicochemical properties of prepared nanocatalysts. It was found that increasing of fuel/nitrates ratio decreased the specific surface area due to incomplete combustion reaction. TG and FTIR results proved that some combustion residuals such as nitrate species and propylene glycol remained in fabricated samples and their amount increased by increasing of fuel/nitrates ratio. Also, higher dispersion of CuO crystallites as the major active sites of steam methanol reforming achieved by CZA(PG/N = 1). So, it reached the complete conversion of methanol at lower temperature compared to the other samples. The synthesized sample with propylene glycol to nitrates ratiomore » of 1 showed high stability during 1200 min. Moreover, the deactivation study was performed on best and worst synthesized nanocatalysts.« less

Authors:
; ;  [1]
  1. Chemical Engineering Faculty, Sahand University of Technology, P.O. Box 51335-1996, Sahand New Town, Tabriz (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22804010
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 102; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; CARBON MONOXIDE; CATALYSTS; COMBUSTION; CONVERSION; COPPER OXIDES; FOURIER TRANSFORM SPECTROMETERS; GLYCOLS; HYDROGEN PRODUCTION; METHANOL; MICROWAVE RADIATION; NANOMATERIALS; NITRATES; PROPYLENE; SCANNING ELECTRON MICROSCOPY; SPECIFIC SURFACE AREA; SYNTHESIS; X-RAY DIFFRACTION; ZINC OXIDES

Citation Formats

Ajamein, Hossein, Haghighi, Mohammad, Alaei, Shervin, and Reactor and Catalysis Research Center. Influence of propylene glycol/nitrates ratio on microwave-assisted combustion synthesis of CuO-ZnO-Al2O3 nanocatalyst: Structural and catalytic properties toward hydrogen production from methanol. United States: N. p., 2018. Web. doi:10.1016/J.MATERRESBULL.2018.02.026.
Ajamein, Hossein, Haghighi, Mohammad, Alaei, Shervin, & Reactor and Catalysis Research Center. Influence of propylene glycol/nitrates ratio on microwave-assisted combustion synthesis of CuO-ZnO-Al2O3 nanocatalyst: Structural and catalytic properties toward hydrogen production from methanol. United States. https://doi.org/10.1016/J.MATERRESBULL.2018.02.026
Ajamein, Hossein, Haghighi, Mohammad, Alaei, Shervin, and Reactor and Catalysis Research Center. 2018. "Influence of propylene glycol/nitrates ratio on microwave-assisted combustion synthesis of CuO-ZnO-Al2O3 nanocatalyst: Structural and catalytic properties toward hydrogen production from methanol". United States. https://doi.org/10.1016/J.MATERRESBULL.2018.02.026.
@article{osti_22804010,
title = {Influence of propylene glycol/nitrates ratio on microwave-assisted combustion synthesis of CuO-ZnO-Al2O3 nanocatalyst: Structural and catalytic properties toward hydrogen production from methanol},
author = {Ajamein, Hossein and Haghighi, Mohammad and Alaei, Shervin and Reactor and Catalysis Research Center},
abstractNote = {Highlights: • Applicability of propylene glycol in synthesis of CuO/ZnO/Al{sub 2}O{sub 3} via combustion method. • Addressing the influence of fuel to nitrates ratio on catalytic properties and performance. • Synthesis of stable and active CuO/ZnO/Al{sub 2}O{sub 3} nanocatalyst in methanol to hydrogen. • Achievement of complete conversion at 260 °C by choosing appropriate amount of fuel. • Decrease of CO production by applying suitable fuel/nitrates ratio. - Abstract: A series of CuO-ZnO-Al{sub 2}O{sub 3} nanocatalysts were fabricated by microwave-assisted combustion method to investigate the role of propylene glycol/nitrates ratio. XRD, FESEM, FTIR, EDX, BET and TG techniques were applied to study the physicochemical properties of prepared nanocatalysts. It was found that increasing of fuel/nitrates ratio decreased the specific surface area due to incomplete combustion reaction. TG and FTIR results proved that some combustion residuals such as nitrate species and propylene glycol remained in fabricated samples and their amount increased by increasing of fuel/nitrates ratio. Also, higher dispersion of CuO crystallites as the major active sites of steam methanol reforming achieved by CZA(PG/N = 1). So, it reached the complete conversion of methanol at lower temperature compared to the other samples. The synthesized sample with propylene glycol to nitrates ratio of 1 showed high stability during 1200 min. Moreover, the deactivation study was performed on best and worst synthesized nanocatalysts.},
doi = {10.1016/J.MATERRESBULL.2018.02.026},
url = {https://www.osti.gov/biblio/22804010}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 102,
place = {United States},
year = {2018},
month = {6}
}