MCM-41 support for ultrasmall γ-Fe2O3 nanoparticles for H2S removal
- Univ. of Cagliari, Monserrato (Italy). Dept. of Chemical and Geological Sciences; Consorzio AUSI, Iglesias (Italy); National Interuniversity Consortium of Materials Science and Technology (INSTM), Cagliari (Italy)
- Univ. of Cagliari, Monserrato (Italy). Dept. of Chemical and Geological Sciences
- Univ. of Cagliari, Monserrato (Italy). Dept. of Chemical and Geological Sciences; National Interuniversity Consortium of Materials Science and Technology (INSTM), Cagliari (Italy)
- Charles Univ., Prague (Czech Republic). Dept. of Inorganic Chemistry; Inst. of Inorganic Chemistry of the Czech Academy Of Sciences, Husinec Rez (Czech Republic)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
In this paper, MCM-41 is proposed to build mesostructured Fe2O3-based sorbents as an alternative to other silica or alumina supports for mid-temperature H2S removal. MCM-41 was synthesized as micrometric (MCM41_M) and nanometric (MCM41_N) particles and impregnated through an efficient two-solvent (hexane–water) procedure to obtain the corresponding γ-Fe2O3@MCM-41 composites. The active phase is homogeneously dispersed within the 2 nm channels in the form of ultrasmall maghemite nanoparticles assuring a high active phase reactivity. The final micrometric (Fe_MCM41_M) and nanometric (Fe_MCM41_N) composites were tested as sorbents for hydrogen sulphide removal at 300 °C and the results were compared with a reference sorbent (commercial unsupported ZnO) and an analogous silica-based sorbent (Fe_SBA15). MCM-41 based sorbents, having the highest surface areas, showed superior performances that were retained after the first sulphidation cycle. Specifically, the micrometric sorbent (Fe_MCM41_M) showed a higher SRC value than the nanometric one (Fe_MCM41_N), due to the low stability of the nanosized particles over time caused by their high reactivity. Finally and furthermore, the low regeneration temperature (300–350 °C), besides the high removal capacity, renders MCM41-based systems an alternative class of regenerable sorbents for thermally efficient cleaning up processes in Integrated Gasification Combined Cycles (IGCC) systems.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Cagliari, Monserrato (Italy)
- Sponsoring Organization:
- USDOE Office of Science (SC); Consorzio AUSI (Italy); Univ. of Cagliari (Italy)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1425090
- Report Number(s):
- BNL-203302-2018-JAAM; TRN: US1802041
- Journal Information:
- Journal of Materials Chemistry. A, Vol. 5, Issue 41; ISSN 2050-7488
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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