Surface-modified carbon nanotubes catalyze oxidative dehydrogenation of n-butane |
| |
| Authors: | Zhang Jian Liu Xi Blume Raoul Zhang Aihua Schlögl Robert Su Dang Sheng |
| |
| Institution: | Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, D-14195 Berlin, Germany. |
| |
| Abstract: | Butenes and butadiene, which are useful intermediates for the synthesis of polymers and other compounds, are synthesized traditionally by oxidative dehydrogenation (ODH) of n-butane over complex metal oxides. Such catalysts require high O2/butane ratios to maintain the activity, which leads to unwanted product oxidation. We show that carbon nanotubes with modified surface functionality efficiently catalyze the oxidative dehydrogenation of n-butane to butenes, especially butadiene. For low O2/butane ratios, a high selectivity to alkenes was achieved for periods as long as 100 hours. This process is mildly catalyzed by ketonic CO groups and occurs via a combination of parallel and sequential oxidation steps. A small amount of phosphorus greatly improved the selectivity by suppressing the combustion of hydrocarbons. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
