High yields of cyclohexane carboxylic acids were obtained by direct hydrogenation of aromatic carboxylic acids over different Ni/carbon catalysts having distinctive surface properties. The catalysts were characterized by SEM, TEM, H₂-TPR and N₂ adsorption isotherms for the determination of BET surface area and porosity. The hydrogenation reaction was carried out in batch pressure reactor in gas-liquid phase at 200 °C. High selectivity (100%) of cyclohexane carboxylic acids at 86.2 mol% conversion of benzoic acid was achieved over microwave-activated biochar supported non-precious metal Ni catalyst. The 10%Ni/CSC-b catalyst has been investigated for hydrogenation of benzoic acid to cyclohexane carboxylic acids and shown little deactivation in stability test. The effects of Ni loading, high dispersion of Ni species, appropriate power of microwave heating and strong interaction of Ni species with carbon are of benefit to the reaction.

通过在具有独特表面性质的不同Ni /碳催化剂上将芳族羧酸直接氢化，可获得高产率的环己烷羧酸。用SEM，TEM，H ₂ -TPR和N ₂对催化剂进行了表征。用于确定BET表面积和孔隙率的吸附等温线。氢化反应在间歇压力反应器中在200℃下在气相中进行。在微波活化的生物炭负载的非贵金属Ni催化剂上，在苯甲酸的86.2mol％转化率下实现了高选择性（100％）的环己烷羧酸。已经研究了10％Ni / CSC-b催化剂用于将苯甲酸氢化为环己烷羧酸，并且在稳定性测试中几乎没有失活。Ni负载，Ni物种的高分散性，适当的微波加热功率以及Ni物种与碳的强相互作用的影响对该反应有利。