Controlling the physical properties of magnesium oxide using a calcination method in aerogel synthesis: Its application to enhanced sorption of a sulfur Compound

Anh Tuan Vu, Shunbo Jiang, Yo Han Kim, Chang-Ha Lee

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Abstract

To synthesize mesoporous magnesium oxide (MgO) with a high surface area and pore volume, a calcination procedure was developed for hydrated MgO prepared by the same aerogel method. The sorption capacities of as-prepared MgO compounds were evaluated by breakthrough experiments to remove methylmercaptan (291 μmol/mol) from methane. The surface area of nanosized MgO varied from 296.6 to 503.5 m2/g, depending on the calcination procedure. The physical properties and sorption capacity of MgO were affected by the final temperature, step, and heating rate during calcination, but the sorption capacity could not be evaluated only by the surface area and pore volume. MgO prepared by the four-step calcination method, which had two additional steps in the significant decomposition temperature range, had 2-11 times higher sorption capacity than MgO by other calcination methods. This suggests that optimizing the calcination method is as important as searching for a new synthesis route.

Original languageEnglish
Pages (from-to)13228-13235
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume53
Issue number34
DOIs
Publication statusPublished - 2014 Aug 27

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Magnesium Oxide
Sulfur Compounds
Aerogels
Sulfur compounds
Magnesia
Calcination
Sorption
Physical properties
Methane
Heating rate
Decomposition
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

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abstract = "To synthesize mesoporous magnesium oxide (MgO) with a high surface area and pore volume, a calcination procedure was developed for hydrated MgO prepared by the same aerogel method. The sorption capacities of as-prepared MgO compounds were evaluated by breakthrough experiments to remove methylmercaptan (291 μmol/mol) from methane. The surface area of nanosized MgO varied from 296.6 to 503.5 m2/g, depending on the calcination procedure. The physical properties and sorption capacity of MgO were affected by the final temperature, step, and heating rate during calcination, but the sorption capacity could not be evaluated only by the surface area and pore volume. MgO prepared by the four-step calcination method, which had two additional steps in the significant decomposition temperature range, had 2-11 times higher sorption capacity than MgO by other calcination methods. This suggests that optimizing the calcination method is as important as searching for a new synthesis route.",
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T2 - Its application to enhanced sorption of a sulfur Compound

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AU - Jiang, Shunbo

AU - Kim, Yo Han

AU - Lee, Chang-Ha

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