MCM-41 support for ultrasmall γ-Fe2O3 nanoparticles for H2S removal
Abstract
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.
- Authors:
-
[1];
[2];
[3];
[3];
[1];
[3];
[2];
[4];
[5];
[1]
- 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
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Cagliari, Monserrato (Italy)
- Sponsoring Org.:
- USDOE Office of Science (SC); Consorzio AUSI (Italy); Univ. of Cagliari (Italy)
- OSTI Identifier:
- 1425090
- Report Number(s):
- BNL-203302-2018-JAAM
Journal ID: ISSN 2050-7488; TRN: US1802041
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Materials Chemistry. A
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 41; Journal ID: ISSN 2050-7488
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Cara, C., Rombi, E., Musinu, A., Mameli, V., Ardu, A., Sanna Angotzi, M., Atzori, L., Niznansky, D., Xin, H. L., and Cannas, C. MCM-41 support for ultrasmall γ-Fe2O3 nanoparticles for H2S removal. United States: N. p., 2017.
Web. doi:10.1039/C7TA03652C.
Cara, C., Rombi, E., Musinu, A., Mameli, V., Ardu, A., Sanna Angotzi, M., Atzori, L., Niznansky, D., Xin, H. L., & Cannas, C. MCM-41 support for ultrasmall γ-Fe2O3 nanoparticles for H2S removal. United States. https://doi.org/10.1039/C7TA03652C
Cara, C., Rombi, E., Musinu, A., Mameli, V., Ardu, A., Sanna Angotzi, M., Atzori, L., Niznansky, D., Xin, H. L., and Cannas, C. Sat .
"MCM-41 support for ultrasmall γ-Fe2O3 nanoparticles for H2S removal". United States. https://doi.org/10.1039/C7TA03652C. https://www.osti.gov/servlets/purl/1425090.
@article{osti_1425090,
title = {MCM-41 support for ultrasmall γ-Fe2O3 nanoparticles for H2S removal},
author = {Cara, C. and Rombi, E. and Musinu, A. and Mameli, V. and Ardu, A. and Sanna Angotzi, M. and Atzori, L. and Niznansky, D. and Xin, H. L. and Cannas, C.},
abstractNote = {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.},
doi = {10.1039/C7TA03652C},
journal = {Journal of Materials Chemistry. A},
number = 41,
volume = 5,
place = {United States},
year = {Sat Jul 08 00:00:00 EDT 2017},
month = {Sat Jul 08 00:00:00 EDT 2017}
}
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