15N solid state NMR study of the reactions of propane or propene, 15NO and oxygen on Na‐, H‐, and CuZSM‐5 |
| |
Authors: | Jianjun Wu Sarah C Larsen |
| |
Abstract: | Ni- and Co-based catalysts derived from NiAl- and CoAl-layered double hydroxides were tested in four kinds of reactions of
methanol, namely decomposition of methanol (DCM), partial oxidation of methanol (POM), steam reforming of methanol (SRM),
and oxidative steam reforming of methanol (OSRM), for the purpose of H2 production for fuel cells. H2, CO and/or CO2 were the predominant products with minor amounts of dimethyl ether (DME) and CH4 depending on the reaction temperature. Among the four kinds of reactions tested, the OSRM reaction was found to be more effective
in terms of MeOH conversion and H2 selectivity over these catalysts. Higher selectivity of H2 and CO2 with only traces of CO could be obtained at about 100% methanol conversion around 300 °C in the OSRM reaction over the catalyst
derived from CoAl-LDH. Substitution of a part of Al by Sn in the NiAl- and CoAl-LDH systems was found to be inhibiting the
methanol conversion. On the other hand, the selectivities to DME and CH4 were declined with a consequent increase in the selectivity to H2. In addition, considerable amount of formaldehyde was also noticed, especially over the catalyst derived from CoAlSn-LDH
at lower reaction temperatures. The observed difference in the catalytic performance upon Sn incorporation was attributed
to an improved redox capability of the Ni- and Co-based oxide catalysts, as determined by temperature-programmed reduction
(TPR) experiments.
This revised version was published online in July 2006 with corrections to the Cover Date. |
| |
Keywords: | methanol reactions hydrogen production partial oxidation of methanol steam reforming of methanol Ni-based catalysts Co-based catalysts layered double hydroxides |
本文献已被 SpringerLink 等数据库收录! |
|