Desorption of Mercaptans and Water from a Silica–Alumina Gel
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- 作者：Volkmar ChowanietzChristoph Pasel ; Michael Luckas ; Tobias Eckardt ; Dieter Bathen
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2017
- 出版时间：January 18, 2017
- 年：2017
- 卷：56
- 期：2
- 页码：614-621
- 全文大小：517K
- ISSN：1520-5045
文摘
An industrially widely used technology for the removal of condensable components like water and mercaptans from natural gas is cyclic temperature swing adsorption. Optimized design of these coupled adsorption–desorption processes requires detailed knowledge of desorption properties of the used adsorbents. Therefore, the desorption behavior of water, methyl mercaptan, and ethyl mercaptan was investigated on a commercial silica–alumina gel. In dynamic experiments, a preloaded fixed bed was regenerated with hot purge gas (300 °C), and time-dependent concentration and temperature profiles were measured and discussed by means of equilibrium theory. Characteristic plateau temperatures were found between 43 and 63 °C, rising with the adsorption affinity. Experiments with competitive adsorption of water and mercaptans show that process dynamics are mainly controlled by water. The results are evaluated with regard to technical relevance.