Influence of Steam, Hydrogen Chloride, and Hydrogen Sulfide on the Release and Condensation of Zinc in Gasification

详细信息    查看全文

• 作者：Maria Benito Abascal ; Marc Bläsing ; Yoshihiko Ninomiya ; Michael Müller
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：June 29, 2016
• 年：2016
• 卷：55
• 期：25
• 页码：6911-6921
• 全文大小：522K
• 年卷期：0
• ISSN：1520-5045

文摘

The aim of this work was to assess the influence of H₂O, HCl, and H₂S on the condensation and release of zinc. The condensation behavior of the zinc vapors was investigated in a heated flow channel reactor housed in a furnace with a gas cooling zone, where eight glass filters were placed on different cooling stages. The metal species deposited in the filters were determined by means of ion chromatography (IC) and inductively coupled plasma optical emission spectroscopy (ICP-OES). Experiments on the release of the inorganic vapors were carried out in a heated flow channel reactor coupled to a molecular beam mass spectrometer (MBMS). The experiments were carried out under two typical gasification conditions (H₂/H₂O/He or Ar) and atmospheric pressure with 50 and 500 ppm_v of HCl and H₂S. Hot gas analysis was done at 900, 800, 700, and 500 °C. The condensation experiments showed that zinc condensed as ZnO, ZnCl₂, and ZnS under the conditions considered. The species detected in the gas phase were Zn, ZnO, ZnCl₂, and ZnS. The experimental results were compared with Scheil–Gulliver cooling calculations carried out with FactSage 6.3 software. This model was proven to be an excellent tool for the prediction of the behavior of zinc under gasification conditions. Furthermore, the global kinetics of the condensation experiments was clarified with the thermodynamic pseudoequilibrium model recently developed by researchers of Chubu University (Japan). With this work, not only a good understanding of the behavior of the zinc under gasification conditions was obtained, but also the finding and evidence of a powerful tool for predicting fast and easily the behavior of trace metals under gasification conditions.