In situ and downstream sulfidation reactivity of PbO and ZnO during pyrolysis and hydrogenation of a high–sulfur lignite |
| |
| Affiliation: | 1. Department of Chemical Engineering, Ataturk University, 25240, Erzurum, Turkey;2. Department of Chemical Engineering, Middle East Technical University, 06800, Cankaya, Ankara, Turkey;1. Vilnius Gediminas Technical University, Faculty of Transport Engineering, J. Basanaviciaus 28, LT-03224 Vilnius, Lithuania;2. Czestochowa University of Technology, Faculty of Mechanical Engineering and Computer Science, Dabrowskiego 69 street, 42-201 Czestochowa, Poland;1. Dokuz Eylul University, Faculty of Engineering, Mechanical Engineering Department, Tinaztepe, Buca, Izmir, 35397, Turkey;2. Dokuz Eylul University, The Graduate School of Natural and Applied Sciences, Mechanical Engineering Department, Tinaztepe, Buca, Izmir, 35397, Turkey;3. Gebze Technical University, Faculty of Engineering, Mechanical Engineering Department, Gebze, Kocaeli, 41400, Turkey;4. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research - Electrochemical Process Engineering(IEK-3), 52425, Jülich, Germany;5. Chair for Fuel Cells, RWTH Aachen University, C/o Institute of Electrochemical Process Engineering (IEK-3), Forschungszentrum Jülich GmbH, Wilhelm–Johnen–Str., D52428, Germany;1. Department of Mechatronics Engineering, Iskenderun Technical University, Hatay, 31200, Turkey;2. Department of Mechanical Engineering, Iskenderun Technical University, Hatay, 31200, Turkey;3. Department of Mechanical Engineering, Çukurova University, Adana, 01330, Turkey;1. Kocaeli University, Department of Mechanical Engineering, 41380, Kocaeli, Turkey;2. Kocaeli University, Department of Industrial Engineering, 41380, Kocaeli, Turkey;1. Ege University, Engineering Faculty, Bioengineering Department, 35100, Izmir, Turkey;2. University of La Coruña, Faculty of Sciences and Center for Advanced Scientific Research (CICA), La Coruña, Spain;3. Ege University, Center for Environmental Studies, 35100, Izmir, Turkey |
| |
| Abstract: | Economical valorization of low quality, high sulfur feedstocks is an important challenge. Most of the valorization processes start from pyrolysis, with a significant amount of evolution of sulfur containing compounds. This study addresses in situ and downstream sulfur capture ability of lead oxide (PbO) in comparison to zinc oxide (ZnO) during the pyrolysis of high–sulfur Tuncbilek lignite. In order to assess the role of hydrogen in sulfur capture, hydrogenation experiments were also performed. Sulfidation reaction thermodynamics of PbO and ZnO was compared to most commonly used metal oxides for sulfur capture i.e., FeO, MnO, and CaO. The equilibrium conversions indicated superior performance of PbO and ZnO towards sulfidation reactions at high temperatures. Thermodynamic superiority of PbO sulfidation encouraged us to investigate the PbO as a new sulfur sorbent for hot gas desulfurization. The experimental verification of the high temperature sulfidation ability of PbO and ZnO was performed using high–sulfur Tuncbilek lignite under semibatch conditions. The final compounds formed after each process were observed by X-ray diffractometer (XRD) and Diffuse Reflectance Infrared Fourier Transformation Spectroscopy (DRIFTS). Experiments revealed that PbO can be promising candidate as hot gas sulfur trap during pyrolysis and hydrogenation processes, while ZnO can hold up sulfur only in the presence of hydrogen. Furthermore, both PbO and ZnO show the superior sulfur capture performance in the presence of hydrogen when they were used as adsorbents located after the reactor (downstream) at ambient conditions. |
| |
| Keywords: | Pyrolysis Hydrogenation Sulfidation of PbO Sulfidation of ZnO |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
