CuO-In2O3 Catalysts Supported on Halloysite Nanotubes for CO2 Hydrogenation to Dimethyl Ether
| Autor: | Pavel E. Plyusnin, D.I. Potemkin, Aleksandr Glotov, Pavel V. Snytnikov, M. I. Rubtsova, A.A. Pechenkin |
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| Rok vydání: | 2021 |
| Předmět: |
Thermal desorption spectroscopy
Chemical technology dimethyl ether aluminosilicates halloysite nanotubes TP1-1185 Catalysis Chemistry chemistry.chemical_compound Adsorption chemistry Chemical engineering Dimethyl ether indium oxide Methanol Physical and Theoretical Chemistry copper-indium catalysts Bifunctional Selectivity QD1-999 CO2 hydrogenation Space velocity |
| Zdroj: | Catalysts, Vol 11, Iss 1151, p 1151 (2021) Catalysts Volume 11 Issue 10 |
| ISSN: | 2073-4344 |
| DOI: | 10.3390/catal11101151 |
| Popis: | Hydrogenation of CO2 relative to valuable chemical compounds such as methanol or dimethyl ether (DME) is an attractive route for reducing CO2 emissions in the atmosphere. In the present work, the hydrogenation of CO2 into DME over CuO-In2O3, supported on halloysite nanotubes (HNT) was investigated in the temperature range 200–300 °C at 40 atm. HNT appears to be novel promising support for bifunctional catalysts due to its thermal stability and the presence of acidic sites on its surface. CuO-In2O3/HNT catalysts demonstrate higher CO2 conversion and DME selectivity compared to non-indium CuO/HNT catalysts. The catalysts were investigated by N2 adsorption, X-ray diffraction, hydrogen-temperature programmed reduction and transition electron microscopy. The acid sites were analyzed by temperature programmed desorption of ammonia. It was shown that CuO/HNT was unstable under reaction conditions in contrast to CuO-In2O3/HNT. The best CuO-In2O3/HNT catalyst provided CO2 conversion of 7.6% with 65% DME selectivity under P = 40 atm, T = 250 °C, gas hour space velocity 12,000 h−1 and H2:CO2 = 3:1. |
| Databáze: | OpenAIRE |
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