A simple granulation technique for preparing high-porosity nano copper oxide(II) catalyst beads--颗粒学报PARTICUOLOGY

Ahmadi, S. J., Outokesh, M., Hosseinpour, M., & Mousavand, T. (2011). A simple granulation technique for preparing high-porosity nano copper oxide(II) catalyst beads. Particuology, 9(5), 480–485. https://doi.org/10.1016/j.partic.2011.02.010

A simple granulation technique for preparing high-porosity nano copper oxide(II) catalyst beads

Seyed Javad Ahmadi ^a *, Mohammad Outokesh ^b, Morteza Hosseinpour ^b, Tahereh Mousavand ^c

a Jaber Ebne Hayyan Research Laboratory, NSTRI, Tehran, Iran
b School of Energy Engineering, Sharif University of Technology, Azadi Ave., P.O. Box 113658639, Tehran, Iran
c Department of Mechanical Engineering, McGill University, 817 Sherbrooke Street, West Montréal, QC H3A 2K6, Canada

10.1016/j.partic.2011.02.010

Volume 9, Issue 5, October 2011, Pages 480-485

Received 12 January 2010, Revised 20 January 2011, Accepted 12 February 2011, Available online 19 September 2011.

E-mail: sjahmadi@yahoo.com; sjahmadi@aeoi.org.ir

Highlights

Abstract

A simple and efficient method was developed for fabricating spherical granules of CuO catalyst via a three-step procedure. In the first step, copper oxide nanoparticles were synthesized by hydrothermal decomposition of copper nitrate solution under supercritical condition. Then, they were immobilized in the polymeric matrix of calcium alginate, and followed by high-temperature calcination in an air stream as the third step, in which carbonaceous materials were oxidized, to result in a pebble-type catalyst of high porosity. The produced CuO nanoparticles were characterized by transmission electron microscopy (TEM) that revealed an average size of 5 nm, X-ray diffractometry (XRD), and thermo gravimetric (TG) analysis. The catalysts were further investigated by BET test for measurement of their surface area, and by temperature-programmed reduction analysis (H₂-TPR) for determination of catalytic activity. The results demonstrated that immobilization of the CuO nanoparticle in the polymeric matrix of calcium alginate, followed by calcination at elevated temperatures, could result in notable mechanical strength and enhanced catalytic activity due to preservation of the high surface area, both valuable for practical applications.

Graphical abstract

Keywords

CuO nanoparticles; Catalyst; Hydrothermal synthesis; Supercritical water; Granulation; Calcium alginate

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