Ni2P/SBA-15 As a Hydrodeoxygenation Catalyst with Enhanced Selectivity for the Conversion of Methyl Oleate Into n-Octadecane
Ni2P/SBA-15 As a Hydrodeoxygenation Catalyst with Enhanced Selectivity for the Conversion of Methyl Oleate Into n-Octadecane
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DOI：
10.1021/cs200659r
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发表时间：
2012-03
期刊：
影响因子：
12.9
通讯作者：
Yongxing Yang;Cristina Ochoa-Hernández;V. A. L. P. O’Shea;J. M. Coronado;D. Serrano
中科院分区：
文献类型：
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作者：
Yongxing Yang;Cristina Ochoa-Hernández;V. A. L. P. O’Shea;J. M. Coronado;D. Serrano
一种新型加氢脱氧催化体系Ni₂P/SBA - 15已通过程序升温还原浸渍在介孔二氧化硅载体中的磷酸镍前体合成。通过X射线衍射验证了该活性相的形成，而透射电子显微镜研究表明，该催化剂主要由分散在SBA - 15通道内尺寸相对均匀的磷化镍颗粒组成。在固定床连续流动反应器中，对Ni₂P/SBA - 15和作为参照的Ni/SBA - 15催化剂进行了油酸甲酯（C₁₇H₃₃–COO–CH₃）加氢脱氧测试。该化合物被用作植物油中存在的甘油三酯分子的便捷替代物，经过催化加氢处理后，正构烷烃是主要产物。在所研究的整个压力范围（3 - 40巴）内以及温度高于290°C时，两种体系在重量时空速度为20 h⁻¹时都实现了超过80%的酯转化率，尽管Ni/SBA - 15催化剂呈现出略微……
A novel hydrodeoxygenation catalytic system, Ni2P/SBA-15, has been synthesized by temperature-programmed reduction of a nickel phosphate precursor impregnated in the mesostructured silica support. The formation of this active phase was verified by X-ray diffraction, whereas the study by transmission electron microscopy revealed that the catalyst is mainly constituted of nickel phosphide particles of relatively uniform size dispersed within the SBA-15 channels. Both Ni2P/SBA-15 and a reference Ni/SBA-15 catalyst were tested for the hydrodeoxygenation of methyl oleate (C17H33–COO–CH3) in a fixed-bed continuous flow reactor. This compound was used as a convenient surrogate of triglyceride molecules present in vegetable oils that following catalytic hydrotreating yields n-alkanes as the main products. In the whole range of pressure studied (3–40 bar) and for temperatures higher than 290 °C, both systems achieve more than 80% ester conversion at 20 h–1 WHSV, although the Ni/SBA-15 catalyst presents a slightly ...