**4. Conclusion**

Catalyst screening study for hydrogenation of benzoic acid suggests that 5% Ru/C catalyst was active for hydrogenation of both aromatic ring and carboxylic group, while Pd/C catalyst was observed to be active only for hydrogenation of aromatic ring. With bimetallic Ru-Sn/ Al<sup>2</sup> O3 , catalyst hydrogenation of aromatic ring was inhibited completely, and hydrogenation of carboxylic group was favored to give benzyl alcohol.

The screening of the catalysts showed that the product distribution for hydrogenation of benzoic acid with mono- and bimetallic catalyst of Ru, Pd, Co, and Re was versatile. The study also highlighted that products such as CCA, CHM, and BZOH can be selectively obtained from the same substrate (BZA).
