Title: An active copper-gold nanocatalyst for the direct partial oxidation of methane at low temperature

Authors: Yingxiang Wei; Keliang Wang; Weixia Tu

Addresses: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China ' State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China ' State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China; College of Chemical Engineering, Beijing University of Chemical Technology, P.O. Box 100, Beijing 100029, China

Abstract: ZSM-5 supported copper-gold nanocatalyst (CuAu/ZSM-5) was prepared and investigated in the direct partial oxidation of methane to methanol. The reaction of methane with air was performed at the low temperature range of 333-423 K. Small-sized metal nanoparticles around 6.5 nm were well dispersed on the surface of ZSM-5. The presence of gold in CuAu/ZSM-5 not only affected chemical state of copper bus also benefited the promotion of catalytic activity. In the methane oxidation conducted at 423 K and 2.0 MPa over the CuAu/ZSM-5 catalyst, high yield of methanol reached 48.3% with high selectivity up to 100% to methanol. The CuAu/ZSM-5 catalyst had good recycling performance without the decrease of catalytic activity during four times reuses at least. [Received: December 10, 2014; Accepted: June 21, 2015]

Keywords: partial oxidation; methane oxidation; methanol; copper-gold catalyst; low temperature; copper; gold; metal nanoparticles; nanotechnology; catalytic activity; recycling.

DOI: 10.1504/IJOGCT.2016.079264

International Journal of Oil, Gas and Coal Technology, 2016 Vol.13 No.3, pp.277 - 291

Received: 18 Dec 2014
Accepted: 21 Jun 2015
Published online: 26 Sep 2016 *

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