Effect of Zn/Al ratio of Ni/ZnO-Al2O3 catalysts on the catalytic deoxygenation of oleic acid into alkane
Effect of Zn/Al ratio of Ni/ZnO-Al2O3 catalysts on the catalytic deoxygenation of oleic acid into alkane
复制标题
Ni/ZnO-Al2O3催化剂Zn/Al比对油酸催化脱氧制烷烃的影响
DOI：
10.1016/j.apcata.2016.11.012
复制
发表时间：
2017-01
期刊：
影响因子：
--
通讯作者：
Li Xuebing
中科院分区：
文献类型：
--
作者：
Chen Lei;Zhang Feng;Li Guangci;Li Xuebing
制备了负载在 Zn-Al 复合氧化物上的镍基催化剂，用于油酸催化脱氧生成柴油烷烃，并详细研究了 Zn/Al 比例对载体物理化学性质和最终催化剂脱氧活性的影响。结果表明，较高的Zn/Al比导致载体的比表面积较低，Ni物种与载体之间的相互作用减弱，从而提高了Ni物种的还原性。然而，较高的 Zn/Al 比可能会限制 Ni 物质的分散，导致金属 Ni 的暴露量减少。由于反应物的转化率和脱氧主要取决于催化剂的加氢能力，而加氢能力由暴露的金属Ni的量控制，因此Zn/Al比为2/1的催化剂表现出最高的加氢速率和烷烃产率。进一步降低Zn/Al比会导致强烈的金属-载体相互作用，使得Ni物种难以还原，这也可能抑制烷烃产物的形成。此外，Zn/Al比的变化会影响中间体类型，进而影响烷烃产物的收率。
Ni-based catalysts supported on Zn-Al composite oxides have been prepared for the catalytic deoxygenation of oleic acid into diesel-ranged alkanes, and the effects of the Zn/Al ratio on the physico-chemical properties of the supports and the deoxygenation activity of the final catalyst were investigated in detail. The results showed that higher Zn/Al ratios led to lower specific surface area of the supports and weakening of the interaction between Ni species and supports thereby improving the reducibility of Ni species. However, higher Zn/Al ratios may limit the dispersion of Ni species, leading to a decrease in the exposure of metallic Ni. Because the conversion and deoxygenation of the reactants mainly depended on the hydrogenation capability of the catalysts which was controlled by the amount of exposed metallic Ni, the catalyst with a Zn/Al ratio of 2/1 showed the highest hydrogenation rate and alkane yield. Further decreasing the Zn/Al ratio led to strong metal-support interaction, making the Ni species difficult to reduce, which may also inhibit the formation of alkane products. In addition, the change in Zn/Al ratio affected intermediate type, which could affect the yield of alkane products.
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影响因子：
12.9
作者：
Yongxing Yang;Cristina Ochoa-Hernández;V. A. L. P. O’Shea;J. M. Coronado;D. Serrano
通讯作者：
Yongxing Yang;Cristina Ochoa-Hernández;V. A. L. P. O’Shea;J. M. Coronado;D. Serrano
影响因子：
4.5
作者：
Guangci Li;Feng Zhang;Lei Chen;Chuanhui Zhang;He Huang;Xuebing Li
通讯作者：
Guangci Li;Feng Zhang;Lei Chen;Chuanhui Zhang;He Huang;Xuebing Li
影响因子：
7.3
作者：
de Brimont, M. Ruinart;Dupont, C.;Raybaud, P.
通讯作者：
Raybaud, P.
影响因子：
5.5
作者：
K. Manukyan;A. Cross;A. Yeghishyan;S. Rouvimov;Jeffrey J. Miller;A. Mukasyan;E. Wolf
通讯作者：
K. Manukyan;A. Cross;A. Yeghishyan;S. Rouvimov;Jeffrey J. Miller;A. Mukasyan;E. Wolf
影响因子：
5.5
作者：
Liu, Qing;Gu, Fangna;Su, Fabing
通讯作者：
Su, Fabing