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首页> 外文期刊>Journal of Materials Engineering and Performance >Additive Manufacturing of Catalyst Substrates for Steam-Methane Reforming
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Additive Manufacturing of Catalyst Substrates for Steam-Methane Reforming

机译：催化剂基材的添加剂制造用于蒸汽 - 甲烷重整

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Steam-methane reforming is a highly endothermic reaction, which is carried out at temperatures up to 1100 A degrees C and pressures up to 3000 kPa, typically with a Ni-based catalyst distributed over a substrate of discrete alumina pellets or beads. Standard pellet geometries (spheres, hollow cylinders) limit the degree of mass transfer between gaseous reactants and catalyst. Further, heat is supplied to the exterior of the reactor wall, and heat transfer is limited due to the nature of point contacts between the reactor wall and the substrate pellets. This limits the degree to which the process can be intensified, as well as limiting the diameter of the reactor wall. Additive manufacturing now gives us the capability to design structures with tailored heat and mass transfer properties, not only within the packed bed of the reactor, but also at the interface between the reactor wall and the packed bed. In this work, the use of additive manufacturing to produce monolithic-structured catalyst substrate models, made from acrylonitrile-butadiene-styrene, with enhanced conductive heat transfer is described. By integrating the reactor wall into the catalyst substrate structure, the effective thermal conductivity increased by 34% from 0.122 to 0.164 W/(m K).
机译：蒸汽 - 甲烷重整是高吸热反应，其在高达1100℃的温度下进行，并且高达3000kPa的压力，通常用分布在离散氧化铝颗粒或珠粒基材上的Ni基催化剂。标准颗粒几何形状（球形，空心圆柱体）限制气态反应物和催化剂之间的质量传递度。此外，将热量供应到反应器壁的外部，并且由于反应器壁和基板粒料之间的点触点的性质而受到热转印。这限制了可以加剧过程的程度，以及限制反应器壁的直径。添加剂制造现在为我们提供了设计具有定制热量和传质性能的结构的能力，而不仅仅在反应器的填充床内，而且在反应器壁和填充床之间的界面处。在这项工作中，描述了使用添加剂制造以产生由丙烯腈 - 丁二烯 - 苯乙烯制成的单片结构催化剂底物模型，具有增强的导电热传递。通过将反应器壁与催化剂底物结构集成，有效的导热率从0.122增加到0.122至0.164w /（m k）增加了34％。

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