Capture of H2S and SO2 in MOFs

Thursday, February 13, 2020

Dr. Ilich A. Ibarra

Universidad Nacional Autónoma de México (UNAM), Mexico

Location: Hand 1144

Time: 4:00 PM


Hydrogen sulphide (H2S) is a harmful chemical present in natural gas, biogas and emitted by different chemical industries, e.g., oil desulfurization process at oil refineries. H2S is considered as a major air pollutant due to its negative environmental impact, mainly associated with acid rain, and to high toxicity to humans leading to severe nervous system illnesses.

Metal-Organic Frameworks (MOF) have been envisaged for the capture of H2S and SO2 however, some of them, with the main disadvantage of showing poor chemical stability. Thus, in this talk we present two MOF materials highly chemically-stable to H2S and SO2: MIL-53(Al)-TDC and MFM-300(Sc), respectively.

MIL-53(Al)-TDC is demonstrated to exhibit one of the highest H2S capture (18.5 mmol g-1 at 298 K and 1 bar) ever reported for a MOF, to the best of our knowledge, along with the retention of its crystalline structure after multiple H2S adsorption/desorption cycles and an excellent regeneration at relatively low temperature. MFM-300(Sc) is demonstrated to exhibit a SO2 uptake of 9.4 mmol g-1 at 298 K and 1 bar significantly higher compared to its Al- and In-analogues, along with the retention of this level of performance after multiple SO2 adsorption/desorption cycles owing to the high stability of its crystalline structure. Advanced experimental and computational tools have been further coupled to gain insight into the molecular mechanisms responsible for the adsorption of H2S and SO2.

Associate Professor, Universidad Nacional Autónoma de México (UNAM), Mexico
Research Fellow in Materials Chemistry  2013, Stockholm University, Sweden
Post Doc in Inorganic Chemistry 2010 to 2013, University of Texas at Austin, USA
PhD in Inorganic Chemistry 2006 to 2010, University of Nottingham, UK
MSc Chemistry 2000 to 2005, Autonomous Metropolitan University, Mexico

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