Oxidative dehydrogenation of ethane to ethylene: A promising CeO2-ZrO2-modified NiO-Al2O3/Ni-foam catalyst
Oxidative dehydrogenation of ethane to ethylene: A promising CeO2-ZrO2-modified NiO-Al2O3/Ni-foam catalyst
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乙烷氧化脱氢制乙烯:一种有前景的 CeO2-ZrO2 改性 NiO-Al2O3/Ni 泡沫催化剂
DOI:
10.1016/j.apcata.2017.11.005
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发表时间:
2018-01
期刊:
影响因子:
--
通讯作者:
Lu Yong
中科院分区:
文献类型:
--
作者:
Zhang Zhiqiang;Ding Jia;Chai Ruijuan;Zhao Guofeng;Liu Ye;Lu Yong
From macro- to nano-engineering of a promising CeO2-ZrO2-doped NiO-Al2O3/Ni-foam catalyst has been demonstrated for the oxidative dehydrogenation of ethane to ethylene (ODE), through facial wet chemical etching of a Ni-foam followed post modification with CeO2and ZrO2. The NiO-Al2O3/Ni-foam (denoted as NANF) achieved a high ethane conversion of 25.2% but with a very low ethylene selectivity of 43.1% at 450 °C. ZrO2-doping of the NANF led to a remarkable improvement in the ethylene selectivity but serious deterioration of activity while the CeO2-doping showed an opposite effect. Co-doping of the NANF using optimal amount of CeO2and ZrO2markedly promoted not only the activity but also the selectivity to ethylene. For example, over the 1CeO2-5ZrO2-NANF (CeO2:1 wt%, ZrO2:5 wt%) catalyst, a high ethane conversion of 40.3% was obtained with a 60.6% ethylene selectivity for a feed gas of C2H6/O2/N2= 1/1/8 at 500 °C and a gas hourly space velocity of 18,000 cm3g−1h−1, corresponding to a high ethylene productivity of 510 gEthylenekgcat−1h−1. In nature, co-doping with CeO2and ZrO2synergistically tamed the NiO for selective H-abstraction of the ethane molecules other than over oxidation of them.
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