Abstract

MgO-supported Ni catalysts were selectively catalysed by the hydrogenation of benzonitrile to benzylamine in continuous flow at atmospheric pressure without any additives. Ni/MgO catalysts were synthesized by co-precipitation method with NaOH as the precipitating agent. All the synthesized catalysts were characterized by various physiochemical techniques, namely XRD, H₂-TPR, BET surface area, CO₂-TPD, SEM, and TEM. Among them, 10% Ni/MgO catalyst showed the best activity with 98% conversion of benzonitrile, 60% selectivity to benzylamine at 473 K. The high dispersion of Ni and strong metal support interactions with MgO are key factors for the catalytic performance. 10Ni/MgO catalyst was found to be consistent throughout the time-on-stream studies of 36 h which clearly explains the excellence of the catalytic system.

Graphic abstract

Ni/MgO catalysts are active in gas phase hydrogenation of benzonitrile to benzylamine at atmospheric pressure.

中文翻译：

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MgO负载的Ni催化剂上苯甲腈的无添加剂蒸气相加氢

摘要

MgO负载的Ni催化剂是在大气压下连续流动，不添加任何添加剂的情况下，通过苯甲腈加氢生成苄胺而选择性催化的。以NaOH为沉淀剂，采用共沉淀法合成了Ni / MgO催化剂。通过各种物理化学技术对所有合成的催化剂进行了表征，分别为XRD，H ₂ -TPR，BET表面积，CO ₂-TPD，SEM和TEM。其中，10％Ni / MgO催化剂表现出最佳的活性，其中苯甲腈的转化率为98％，在473 K下对苄胺的选择性为60％。Ni的高分散性和与MgO的强金属载体相互作用是催化性能的关键因素。在整个36小时的运行时间研究中，发现10Ni / MgO催化剂是一致的，这清楚地说明了催化系统的优越性。

图形摘要

Ni / MgO催化剂在大气压下将苯甲腈气相加氢生成苄胺具有活性。