Mesoporous Organo-Silica Supported Chromium Oxide Catalyst for Oxidative Dehydrogenation of Ethane to Ethylene with CO2

Chromium oxide supported on mesoporous organo-silica (MOS) was synthesized with different Cr loading by an incipient method. The catalytic performance of a Cr(x)/MOS catalyst for CO2-based ethane dehydrogenation investigated. catalysts were characterized XRD, BET, TEM, SEM, XPS, FTIR, and UV–Vis DR measurements. textural properties the prepared samples showed that nature MOS sample not disturbed chromium impregnation. Among samples, Cr(8)/MOS exhibited good distribution species along superior concentration Cr6+ highest recorded Cr6+/Cr3+ ratio. results revealed reached at Cr(8)/MOS, 50.4% 90.1% conversion ethylene selectivity, respectively. activity decreased slowly over reaction time; it declined approximately 22% after 10 h stream operation. roles also studied, where carbon dioxide can be source lattice oxygen as hydrogen consumer in reverse water–gas shift (RWGS) reaction. effect various factors, such temperature, time, space gas velocity, CO2 partial pressure ethane, yield, selectivity to ethylene, investigated well.