Fischer-Tropsch synthesis in milli-structured fixed-bed reactors: Experimental study and scale-up considerations
Fischer-Tropsch synthesis in milli-structured fixed-bed reactors: Experimental study and scale-up considerations
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DOI：
10.1016/j.cep.2010.04.013
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发表时间：
2010-09-01
影响因子：
4.3
通讯作者：
Turek, Thomas
中科院分区：
文献类型：
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作者：
Knochen, Jens;Guettel, Robert;Turek, Thomas
对毫结构固定床反应器中 CoRe/γ-Al2O3 催化剂的低温费托合成（FTS）进行了实验和理论研究。动力学和压降测量在催化剂床长为 1 m 的毛细管中进行。用于计算压降的尔古纳常数是通过在没有反应的情况下进行测量来确定的。借助反应器模型获得了假定的一级动力学的动力学常数，并考虑了反应过程中的体积收缩以及压降。使用相同的模型，估算了反应器中的持液量值。最后，对反应器的放大进行了模拟。可以看出，即使反应通道宽度为 1.5 mm 和 3 mm，也可以有效去除热量。 100μm、200μm和350μm的催化剂颗粒尺寸允许在可接受的压降下实现高效率因子。可以获得高催化剂和反应器体积比生产率，从而形成紧凑且高效的反应器。总之，毫结构固定床反应器似乎是一个有趣的概念，特别是对于小型 FTS 装置。 (C) 2010 Elsevier B.V. 保留所有权利。
The low-temperature Fischer-Tropsch synthesis (FTS) over a CoRe/gamma-Al2O3 catalyst in milli-structured fixed-bed reactors was studied experimentally and theoretically. Kinetic and pressure drop measurements were conducted in a capillary with a catalyst bed length of 1 m. Ergun constants for calculation of the pressure drop were determined by measurements in the absence of reaction. Kinetic constants for the assumed first-order kinetics were obtained with the aid of a reactor model taking into account the volume contraction during reaction as well as the pressure drop. With the same model, values for the liquid holdup in the reactor were estimated. Finally, simulations for a scale-up of the reactor were conducted. It could be shown that effective heat removal is possible even for reaction channel widths of 1.5 mm and 3 mm. Catalyst particle sizes of 100 mu m, 200 mu m and 350 mu m allow for high effectiveness factors at acceptable pressure drops. High catalyst and reactor volume specific productivities can be obtained resulting in compact and efficient reactors. In conclusion, milli-structured fixed-bed reactors appear to be an interesting concept especially for small-scale FTS units. (C) 2010 Elsevier B.V. All rights reserved.