| 吕恩静.助剂Mo对Ni基催化剂加氢脱氧催化作用机理的影响[J].分子催化,2012,(4):333-339 |
| 助剂Mo对Ni基催化剂加氢脱氧催化作用机理的影响 |
| Effect of Mo promoter on catalysis mechanism of hydrodeoxygenation over Nickel-based catalyst |
| 投稿时间：2012-06-29 修订日期：2012-08-12 |
| DOI： |
| 中文关键词: Ni-Mo/γ-Al2O3 乙酸 加氢脱氧 氧空穴 催化作用机理 |
| 英文关键词:Ni-Mo/γ-Al2O3 Acetic acid Hydrodeoxygenation Oxygen vacancy Catalysis mechanism |
| 基金项目:1 |
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| 摘要点击次数: 1659 |
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| 中文摘要: |
| 摘要：制备了一系列Ni-Mo/γ-Al2O3催化剂，并采用X射线衍射、乙酸程序升温表面反应、NO-红外漫反射光谱、乙酸(或乙醇)-红外漫反射光谱等表征手段系统研究了助剂Mo的加入对镍基催化剂的物化性质、乙酸加氢脱氧（HDO）产物、HDO活性位及乙酸（或乙醇）吸附形态的影响。结果表明，Mo的加入可提高活性组分NiO的分散度，且能抑制乙酸C-C键的断裂； Mo的加入可提供氧空穴，以促进乙酸C-O键及中间产物乙醇C-O键的断裂，显著提高了Ni基催化剂的HDO活性和产物C2H6的选择性。表明Mo的加入改变了Ni催化剂HDO的催化作用机理。 |
| 英文摘要: |
| Abstract: A series of Ni-Mo/γ-Al2O3 catalysts were prepared by impregnation method. The effect of Mo addition on the catalyst properties, hydrodeoxygenation (HDO) products, active sites of HDO and adsorbed species of acetic acid(or ethanol) were studied by X-ray diffraction , Temper
-ature programmed surface reaction and Fourier transform infrared spectroscopy. The HDO activity and selectivity were measured using a continuous flow fixed-bed microreactor. Addition of Mo improved the dispersion of NiO and partially inhibited the C-C bond cleavage of acetic acid, also supplied new oxygen vacancies which promoted the C-O bond dissociation of acetic acid or ethanol. This gave an increase of HDO activity and ethane selectivity. It was presumed that the catalysis mechanism of HDO over Nickel-based catalyst was changed by Mo addition. |
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