Reaction and oxygen permeation studies in Sm0.4Ba0.6Fe0.8Co0.2O3 − δ membrane reactor for partial oxidation of methane to syngas
Reaction and oxygen permeation studies in Sm0.4Ba0.6Fe0.8Co0.2O3 − δ membrane reactor for partial oxidation of methane to syngas
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DOI：
10.1016/j.apcata.2005.05.033
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发表时间：
2005-08
影响因子：
5.5
通讯作者：
Masayuki Ikeguchi;T. Mimura;Yasushi Sekine;E. Kikuchi;M. Matsukata
中科院分区：
文献类型：
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作者：
Masayuki Ikeguchi;T. Mimura;Yasushi Sekine;E. Kikuchi;M. Matsukata
将Sm0.4Ba0.6Co0.2Fe0.8O3−δ钙钛矿型混合导电膜应用于甲烷部分氧化制合成气（CO+H2）的膜反应器中。反应使用Rh（1wt%）/MgO催化剂通过进料用Ar稀释的CH 4进行。随着温度的升高，CH 4转化率增加，CO选择性略有下降，但在1173 K时，CH 4转化率和CO选择性分别达到90%和98%。在甲烷催化部分氧化的条件下，氧通量比在渗透侧通入Ar时测得的氧通量有所增加。采用不同的膜反应器结构和不同的气体种类对膜反应器中的反应路径进行了研究。在没有催化剂的膜反应器中，即使在渗透侧通入CH 4，氧通量也没有得到改善，而通入CO或H2时，氧通量得到增强。结果表明，CO和H2在渗透侧表面氧的氧化作用提高了膜的氧通量，CO2和H2O与CH 4发生重整反应生成合成气.
A disk-type Sm0.4Ba0.6Co0.2Fe0.8O3−δperovskite-type mixed-conducting membrane was applied to a membrane reactor for the partial oxidation of methane to syngas (CO+H2). The reaction was carried out using Rh (1wt%)/MgO catalyst by feeding CH4diluted with Ar. While CH4conversion increased and CO selectivity slightly decreased with increasing temperature, a high level of CH4conversion (90%) and a high selectivity to CO (98%) were observed at 1173K. The oxygen flux was increased under the conditions for the catalytic partial oxidation of CH4compared with that measured when Ar was fed to the permeation side. We investigated the reaction pathways in the membrane reactor using different membrane reactor configurations and different kinds of gas. In the membrane reactor without the catalyst, the oxygen flux was not improved even when CH4was fed to the permeation side, whereas the oxygen flux was enhanced when CO or H2was fed. It is implied that the oxidation of CO and H2with the surface oxygen on the permeation side improves the oxygen flux through the membrane, and that CO2and H2O react with CH4by reforming reactions to form syngas.