Hydrogen production via methane pyrolysis in a liquid metal bubble column reactor with a packed bed
Hydrogen production via methane pyrolysis in a liquid metal bubble column reactor with a packed bed
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DOI：
10.1016/j.cej.2016.04.066
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发表时间：
2016-09-01
影响因子：
15.1
通讯作者：
Wetzel, Th.
中科院分区：
文献类型：
--
作者：
Geissler, T.;Abanades, A.;Wetzel, Th.
在930-1175 ℃范围内的各种液态金属温度水平下，使用填充有液态锡和用作填充床的圆柱形石英玻璃环的石英玻璃-钢泡罩塔反应器进行甲烷热解实验。除了液态金属温度外，还特别注意在50-200 mInfinin范围内的进料气体体积流量和用氮气稀释的入口进料气体的影响。提高液态金属温度导致氢气产率增加，导致在1175摄氏度和50分钟/分钟甲烷体积流速下的最大氢气产率为78%。在所有实验运行中，在产物气体中检测到小于1.5摩尔%的中间产物。所产生的碳表现为由尺寸范围为1520 gm的片状附聚物组成的粉末，其中颗粒尺寸从40 nm至100 nm变化。在实验过程中，所产生的碳完全分离并积聚在液态金属的顶面。只有少量随废气流运输。在液态金属存量内，在石英玻璃反应器壁上沉积了约10克的薄碳层，这可能部分地显示了热反应区中纳米管的形成。(C)2016爱思唯尔B. V.保留所有权利。
Methane pyrolysis experiments using a quartz glass-steel bubble column reactor filled with liquid tin and cylindrical quartz glass rings serving as a packed bed were conducted at various liquid metal temperature levels in the range of 930-1175 degrees C. Besides the liquid metal temperature, special attention was paid to the influence of the feed gas volume flow rate in the range of 50-200 mInfinin and the inlet feed gas dilution with nitrogen. Increasing liquid metal temperatures resulted in increasing hydrogen yields, leading to a maximum hydrogen yield of 78% at 1175 degrees C and 50 min/min methane volume flow rate. Within all experimental runs, less than 1.5 mol-% intermediate products were detected in the product gas. The produced carbon appeared as a powder consisting of flake shaped agglomerations in the size range of 1520 gm, wherein the particle size varied from 40 nm to 100 nm. During the experiments, the produced carbon was completely separated and accumulated at the top surface of the liquid metal. Only minor quantities were transported with the off gas stream. Within the liquid metal inventory, a thin carbon layer of about 10 gm, probably partly showing the formation of nanotubes, in the hot reaction zone, had been deposited on the quartz glass reactor wall. (C) 2016 Elsevier B.V. All rights reserved.