State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, PR China.
State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, PR China.
Waste Manag. 2021 Feb 1;120:10-15. doi: 10.1016/j.wasman.2020.11.016. Epub 2020 Dec 3.
In-situ catalytic biomass pyrolysis for syngas production is a competitive technology for the recovery of energy in biomass. However, in conventional in-situ catalytic pyrolysis process, the mode of catalyst introduction makes it difficult to separate the catalyst from the char after pyrolysis, resulting in difficulty in catalyst recycling. We considered that the use of monolithic catalyst which has larger size than the biomass feedstock might solve the problem of the separation difficulty between the catalyst and char. In order to verify the feasibility of this strategy, NiO/γ-AlO was respectively supported on ceramic honeycomb, metal foam, and metal wire mesh to produce three monolithic catalysts with different outer surface areas. Their catalytic performance for cattle manure pyrolysis was tested and the result revealed that compared with the granular NiO/γ-AlO, using monolithic catalysts with ceramic honeycomb, metal foam, and metal wire mesh carrier respectively increased the gas production by 37%, 33%, and 11%. The use of monolithic catalyst in in-situ catalytic biomass pyrolysis, not only simplified the separation process of catalyst and char, but also enhanced the catalysis performance.
原位催化生物质热解制合成气是一种有竞争力的生物质能源回收技术。然而，在传统的原位催化热解过程中，催化剂的引入方式使得催化剂难以从热解后的焦炭中分离出来，从而导致催化剂难以回收。我们认为，使用比生物质原料粒径更大的整体式催化剂可能可以解决催化剂和焦炭之间分离困难的问题。为了验证这一策略的可行性，我们分别将 NiO/γ-AlO 负载在陶瓷蜂窝体、金属泡沫和金属丝网上，制备了三种具有不同外比表面积的整体式催化剂。测试了它们对牛粪热解的催化性能，结果表明，与颗粒状 NiO/γ-AlO 相比，分别使用陶瓷蜂窝体、金属泡沫和金属丝网格载体的整体式催化剂使气体产量分别增加了 37%、33%和 11%。在原位催化生物质热解中使用整体式催化剂，不仅简化了催化剂和焦炭的分离过程，而且提高了催化性能。
