蒽醌加氢法制取H2O2催化剂研究进展

Advances in catalyst for production of H2O2 via hydrogenation of anthraquinone

介绍了蒽醌加氢制取H2O2的化学原理,指出活性组分与载体是催化剂的关键组成部分,合理地调控两者的物化性质是有效提升催化剂性能、降低制备成本及提高H2O2生产效率的重要手段。在活性组分上,Pd颗粒的尺寸与分散度密切相关,直接影响催化剂的活性与选择性;引入第二金属能够与Pd发生电子协同效应,可进一步优化催化剂性能。对于载体,主要从孔结构、表面性质、耐烧结性及微观结构4个方面进行改性处理,有利于降低反应物在催化剂孔道内的传质阻力,改善反应物在催化剂表面的吸附选择性,增强载体稳定性及提高活性金属的分散度。催化剂的活性组分与载体发生协同效应时才能使催化剂的综合性能得以提升。单原子催化剂是对催化剂性能进行深度调控的一个值得探索的研究方向。

The chemical principle of anthraquinone hydrogenation to H2O2 process is analyzed.It is pointed out that active components and support are the key components of the catalyst for this process.Reasonable control of the physical and chemical properties of active components and support is an important measure to improve effectively the performance of the catalyst,reduce the preparation cost and increase the production efficiency of H2O2.The size of Pd particles is closely related to the dispersion degree,which affects directly the activity and selectivity of the catalyst.If the second metal is added,it can generate electronic synergy with Pd,which can further optimize the performance of catalyst.The supports can mainly be modified in four aspects,including pore structure,surface properties,sintering resistance and microstructure,which are beneficial to reduce the mass transfer resistance of reactants in the pore channel of the catalyst,improve the adsorption selectivity of the reactants on the surface of the catalyst,and enhance the stability of support and dispersion of active metals.The comprehensive performance of catalyst can be improved only when a synergistic effect between the active component and the support is generated.Single-atom catalyst is a research direction worthy of exploration in deep control of catalyst performance and reduction of catalyst cost.