Dehydrogenation of isobutane to isobutene with iron-loaded activated carbon catalyst
Dehydrogenation of isobutane to isobutene with iron-loaded activated carbon catalyst
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DOI：
10.1016/s0926-860x(97)00350-5
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发表时间：
1998-03
影响因子：
5.5
通讯作者：
H. Shimada;T. Akazawa;N. Ikenaga;Toshimitsu Suzuki
中科院分区：
文献类型：
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作者：
H. Shimada;T. Akazawa;N. Ikenaga;Toshimitsu Suzuki
在873K下，异丁烷在载铁型活性碳催化剂上成功地脱氢制异丁烯。在873K、W/F为25g-CAT-h/m o l的条件下，每g活性碳负载0.3 mmolFe，异丁烷转化率为48%，产率为40%，选择性为80%。与大量进料异丁烷或异丁烷和Ar混合物相比，共进料二氧化碳促进了脱氢反应。在二氧化碳存在的情况下，脱氢产生的氢气转化为水，二氧化碳还原为一氧化碳。通过对催化剂的X-射线衍射和X射线光电子能谱分析，提出了在二氧化碳催化循环中，Fe3O4和金属铁的氧化还原循环。与在Ar气氛下的反应相比，二氧化碳气流下的碳沉积减少了。
Dehydrogenation of isobutane to isobutene was successufully carried out on iron loaded activated carbon catalyst at 873K. Isobutane conversion of 48%, the yield of 40% and selctivity 80% were obtained with 0.3mmol iron loaded on 1g of activated carbon, at 873K with W/F of 25g-cat-h/mol of isobutane. Cofeeding of carbon dioxide promoted dehydrogenation as compared to feeding bulk isobutane or isobutane and argon mixture. Hydrogen produced by dehydrogenation was transformed into water in the presence of carbon dioxide, and carbon dioxide was reduced to carbon monoxide. A redox cycle of Fe3O4and metallic iron is suggested for the catalytic cycle in carbon dioxide by analyzing XRD and XPS. Carbon deposition was reduced under a carbon dioxide stream as compared with the reaction under argon atmosphere.