The renewability of bio-glycerol has made it an attractive platform for the production of diverse compounds. Selective hydrogenolysis of glycerol to propylene glycol (PG) is one of the most promising routes for glycerol valorization, since this compound is an important chemical intermediate in a number of applications. In this article, advancements in the catalytic conversion of glycerol into propylene glycol are reviewed, which include advances in process development, effects of preparation and activation methods on catalytic activity and stability, and the performance of various types of catalysts. The feasibility of using bio-hydrogen and the challenges of utilizing crude glycerol for glycerol hydrogenolysis are also discussed.

生物甘油的可再生性使其成为生产各种化合物的有吸引力的平台。甘油选择性氢解为丙二醇（PG）是甘油最有价值的途径之一，因为该化合物是许多应用中的重要化学中间体。本文综述了甘油催化转化为丙二醇的进展，包括工艺开发方面的进展，制备和活化方法对催化活性和稳定性的影响以及各种类型催化剂的性能。还讨论了使用生物氢的可行性以及利用粗甘油进行甘油氢解的挑战。