Catalytic activity in the oxidative dehydrogenation of ethane over Ni and/or Co molybdate catalysts: Synthesis and characterization
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- 作者：Hamza Boukhlouf<sup>asup><sup> ; sup><sup>bsup><sup> ; sup><sup>hamza.boukhlouf@iap.dzsup> ; Akila Barama<sup>asup> ; Rafik Benrabaa<sup>asup><sup> ; sup><sup>csup> ; Jesus Guerrero Caballero<sup>dsup><sup> ; sup><sup>esup> ; Axel Lö ; fberg<sup>dsup><sup> ; sup><sup>esup> ; Elisabeth Bordes-Richard<sup>dsup><sup> ; sup><sup>esup>
- 关键词：Ni&ndash ; Co molybdates ; Co-precipitation ; Ethane oxidative dehydrogenation ; Ethylene
- 刊名：Comptes Rendus Chimie
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：20
- 期：1
- 页码：30-39
- 全文大小：1654 K
- 卷排序：20
文摘
Ni and/or Co molybdate based catalysts were synthetized by co-precipitation for the oxidative dehydrogenation of ethane reaction. The catalysts were characterized by several techniques such TGA-DTA, HT-XRD, XRD, LRS, N2 adsorption, XPS and TPR. The results showed that the addition of Ni or Co to MMoO4matrices (M=Ni or Co) led to a high dispersion of additives into the molybdenum matrix without the formation of a significant amount of other bulk metal oxides. Compared to the pure MMoO4, the modified molybdenum (Ni0.5Co0.5MoO4) presents a higher thermal stability (up to 1000 °C). It has a lower BET surface area and higher reduction temperature compared to those of the NiMoO4 sample. In the ODH of ethane, Ni0.5Co0.5MoO4 shows a lower catalytic activity compared to that of MMoO4 samples; however, the ethylene selectivity is enhanced (exceeding 90%). As a result, these series of catalysts show improved efficiency for ethylene production in the ethane ODH reaction.