Abstract
In the context of finding high efficient sorbent materials for removing hydrogen sulfide (H2S) from air stream, a screening study was performed to find the best combination of metals for the synthesis of layered double hydroxides (LDHs) and their derivative mixed metal oxides. Based on selectivity of 998 natural mineral species of sulfur-containing compounds, Cu2+, Ni2+ and Zn2+ were selected as divalent metals, and Fe3+, Al3+ and Cr3+ as trivalent metals to synthesis the LDHs sorbents. 10 LDHs materials and their calcined mixed metal oxides, Ni0.66Al0.34, Cu0.35Ni0.32Al0.33, Zn0.66Al0.34, Cu0.36Zn0.32Al0.32, Ni0.64Fe0.36, Cu0.35Ni0.31Fe0.34, Ni0.66Cr0.34, Cu0.35Ni0.31Cr0.34, Zn0.66Cr0.34, Cu0.33Zn0.32Cr0.35 were synthesized, characterized chemically and physically, and then tested using breakthrough test to determine their sulfur uptake. Ni0.64Fe0.36 mixed metal oxides was found to have the best uptake of hydrogen sulfide (136mg H2S/g). Regeneration of spent Ni0.64Fe0.36 mixed metal oxides was studied using two different mixture solutions, NaCl/NaOH and acetate-buffer/NaCl/NaOH. The latter mixture successfully desorbed the sulfur from the Ni0.64Fe0.36 sorbent for 2 cycles of regeneration/sorption.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
