Hydrogen sulfide removal from biogas using ion-exchanged nanostructured NaA zeolite for fueling solid oxide fuel cells |
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| Affiliation: | 1. State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, PR China;2. Institute of Medical Equipment, Academy of Military and Medical Sciences, Tianjin 300161, PR China;1. Department of Sanitary and Environmental Engineering – Federal University of Santa Catarina - UFSC/CTC/ENS, CEP, 88010 970, Florianópolis, SC, Brazil;2. Engineering Center, Post-Graduation Program in Environmental Sciences – Federal University of Pelotas – CEng/UFPel, CEP, 96085000, Pelotas, RS, Brazil;1. Program of Chemistry, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University, Nakhon Ratchasima, 30000, Thailand;2. Renewable Energy Research Unit (RERU), Faculty of Liberal Arts and Science, Roi-Et Rajabhat University, Selaphum, Roi-Et, 45120, Thailand;3. Takasila Research and Development Center of Energy, Department of Physics, Faculty of Science, Maha Sarakham University, Kantara Wichai, Maha Sarakham, 44150, Thailand;4. School of Renewable Energy and Smart Grid Technology (SGtech), Naresuan University, Meuang Phitsanulok, Phitsanulok, 65000, Thailand;1. School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033 PR China;2. College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590 PR China;3. Department of Engineering, Qiuzhen School, Huzhou University, Huzhou 313000, PR China |
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| Abstract: | Hydrogen sulfide is the most abundant sulfur compound in the biogas, and in order to use for fueling the solid oxide fuel cells, its content should be less than 1 ppm. In this work, NaA nano zeolite is synthesized hydrothermally and modified by Ag+ ions, and its breakthrough capacity for hydrogen sulfide adsorption was measured using dynamic lab-scale adsorption tests on the experimental set-up for the first time. The results are compared to those of unmodified NaA nano zeolite and micron-sized commercial 4A zeolite. AgNaA nano zeolite showed the highest adsorption capacity (33.24 mg H2S/g of Sorbent) and the longest breakthrough time (310 min). The regeneration performance of AgNaA nano zeolite and its structural stability are also investigated after five cycles. The results revealed that the AgNaA nano zeolite could be used promisingly for removing hydrogen sulfide from biogas for cleaner energy production. |
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| Keywords: | Biogas Hydrogen sulfide Adsorption Nano zeolite Fuel cell |
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