Journal
RSC ADVANCES
Volume 6, Issue 55, Pages 49487-49496Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra09203a
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Funding
- Joint Fund of Coal
- National Natural Science Foundation of China
- Shenhua Co., Ltd. [U1261104]
- National Natural Science Foundation of China [21276041]
- Chinese Ministry of Education via the Program for New Century Excellent Talents in University [N8, 12-14CET-12-0079]
- Natural Science Foundation of Liaoning Province [2015020200]
- Fundamental Research Funds for the Central Universities [DUT15LK41]
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The natural halloysite derived silica-alumina composite oxides (SA-H) through calcination at diverse temperatures were employed as supports for synthesizing novel supported Ni catalysts towards steam-CO2 dual reforming of methane (SCRM) for the production of synthesis gas. The effect of calcination temperature on the nature of the as-prepared supports and the supported Ni catalysts was investigated by using various characterization techniques including transmission electron microscopy (TEM), N-2 adsorption-desorption (BET), X-ray diffraction (XRD), CO chemisorption, thermogravimetric analysis (TGA), and H-2 temperature-programmed reduction (H-2-TPR). The supported Ni catalyst on the halloysite derived silica-alumina nanorod (Ni/SANR-H) prepared by calcination at 1000 degrees C exhibited higher catalytic activity with similar selectivity in comparison with the ones prepared with the other temperatures, ascribed to higher Ni dispersity. More interestingly, the robust Ni/SANR-H catalyst exhibited unexpectedly catalytic stability for a SCRM reaction with much higher coke and Ni-sintering resistance than the supported Ni catalyst on traditional silica alumina prepared by a precipitation method (Ni/SA-P). The unexpected coke-resistant capacity of the Ni/SANR-H catalyst endows it to be a promising candidate for synthesis gas production through a SCRM reaction.
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