A review of biochar-based catalysts for chemical synthesis, biofuel production, and pollution control.
A review of biochar-based catalysts for chemical synthesis, biofuel production, and pollution control.
复制标题
DOI：
10.1016/j.biortech.2017.06.163
复制
发表时间：
2017-12
影响因子：
11.4
通讯作者：
Xinni Xiong;I. K. Yu;Leichang Cao;Daniel C W Tsang;Shicheng Zhang;Y. Ok
中科院分区：
文献类型：
--
作者：
Xinni Xiong;I. K. Yu;Leichang Cao;Daniel C W Tsang;Shicheng Zhang;Y. Ok
本文介绍了生物炭作为一种绿色、多用途的催化剂载体在土壤修复以外的新兴高端应用中的应用，包括化学合成和生物质生产生物柴油，以及环境中的污染物降解。它们的催化性能可与传统的树脂、二氧化硅或碳基催化剂相媲美，甚至更好，这是因为生物炭具有良好的内在特性(各种官能团、复杂的结构网络等)。然而，不同的应用需要不同的活跃站点。强调了底物的活性中心可及性是决定其性能的关键因素，这与生物炭的物理化学特性(-SOH中心密度、孔径分布、比表面积等)有关。它们表现出不同的意义，这取决于生物炭上的催化位置，这可以通过新的合成前/合成后修饰来控制。本文综述了生物炭基催化剂的催化性能、物理化学性质和热解/改性特性之间的联系，为今后面向应用的生物炭基催化剂的定制生产提供了参考。
This review addresses the use of biochar as a green and versatile catalyst support for emerging high-end applications beyond soil remediation, including chemical synthesis and biodiesel production from biomass, and pollutant degradation in the environment. Their catalytic performances are comparable or even superior to the conventional resin-, silica-, or carbon-based catalysts, owing to the favourable intrinsic features of biochar (various functional groups, intricate network of structures, etc.). Yet, distinctive active sites are needed for different applications. It is highlighted that the active site accessibility for substrates critically determines the performance, which is associated with the biochar physicochemical characteristics (–SO3H site density, pore size distribution, surface area, etc.). They show varying significance depending on the catalytic sites on biochar, which may be controlled via novel pre-/post-synthesis modifications. This review elucidates the links among catalytic performances, physicochemical properties, and pyrolysis/modification-induced features, advising the tailored production of application-oriented biochar-based catalyst in the future.