Nb-Doped Vanadium Phosphorus Oxide Catalyst for the Aldol Condensation of Acetic Acid with Formaldehyde to Acrylic Acid,Industrial & Engineering Chemistry Research

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Nb-Doped Vanadium Phosphorus Oxide Catalyst for the Aldol Condensation of Acetic Acid with Formaldehyde to Acrylic Acid
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-08-29 , DOI: 10.1021/acs.iecr.8b02132
Yumeng Wang ₁ , Zhenlu Wang ₁ , Xue Hao ₁ , Wenxiang Zhang ₁ , Wanchun Zhu ₁

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Nb-doped vanadium phosphorus oxide catalysts were prepared and characterized using a variety of methods, including XRD, FT-IR, XPS, TPD and BET. The catalysts were examined for their ability to promote the aldol condensation of acetic acid with formaldehyde to acrylic acid. Catalyst composition and the conditions used to prepare the catalysts were investigated for their effects on catalytic activity. The addition of Nb changes the properties and catalytic properties of the catalyst to some extent, especially the surface acidity of catalyst and the average valence of surface V atoms, which have the greatest influence on the catalyst. When Nb/V = 0.06, the catalyst surface has the greatest acidity, the valence of surface V atoms is the lowest, and the selectivity (83.4%) and yield of acrylic acid (18.1%) are maximized.

中文翻译：

Nb掺杂的钒氧化磷催化剂用于乙酸与甲醛的醛醇缩合反应制得丙烯酸

使用多种方法（包括XRD，FT-IR，XPS，TPD和BET）制备并表征了掺Nb的钒磷氧化物催化剂。检查了催化剂促进乙酸与甲醛的醛醇缩合为丙烯酸的能力。研究了催化剂组成和用于制备催化剂的条件对催化剂活性的影响。Nb的添加在一定程度上改变了催化剂的性能和催化性能，特别是催化剂的表面酸度和表面V原子的平均价，这对催化剂的影响最大。当Nb / V ＝ 0.06时，催化剂表面具有最大的酸度，表面V原子的化合价最低，并且选择性（83.4％）和丙烯酸的产率（18.1％）最大化。

更新日期：2018-08-30

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