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  • 1 Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
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Abstract

The thermal properties of SO42−-intercalated Mg–Al layered double hydroxide (SO4·Mg–Al LDH) were investigated using simultaneous thermogravimetry–mass spectrometry (TG–MS), and the elimination behavior of sulfur oxides from this double hydroxide was examined. The TG–MS results showed that SO4·Mg–Al LDH decomposed in five stages. The first stage involved evaporation of surface-adsorbed water and interlayer water in SO4·Mg–Al LDH. In the second, third, and fourth stages, dehydroxylation of the brucite-like octahedral layers in SO4·Mg–Al LDH occurred. The fifth stage corresponded to the elimination of SO42− intercalated in the interlayer of Mg–Al LDH, producing SO2 and SO3. The thermal decomposition of SO4·Mg–Al LDH resulted in the formation of SO2 and SO3 at 900–1000 °C, which then reacted with H2O to form H2SO3 and H2SO4. The elimination of sulfur oxides increased with the decomposition time and temperature. Almost all of the intercalated SO42− was desulfurized from SO4·Mg–Al LDH at 1000 °C; however, Mg–Al oxide was not formed due to the production of MgO and MgAl2O4.

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  • Impact Factor (2019): 2.731
  • Scimago Journal Rank (2019): 0.415
  • SJR Hirsch-Index (2019): 87
  • SJR Quartile Score (2019): Q3 Condensed Matter Physics
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • Impact Factor (2018): 2.471
  • Scimago Journal Rank (2018): 0.634
  • SJR Hirsch-Index (2018): 78
  • SJR Quartile Score (2018): Q2 Condensed Matter Physics
  • SJR Quartile Score (2018): Q2 Physical and Theoretical Chemistry

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
4
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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