Improvements in the pre-combustion carbon dioxide sorption capacity of a magnesium oxide-cesium carbonate sorbent

Christian Vogt, Lan-Yun Chang, Jamileh Taghavimoghaddam, Alan L. Chaffee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Cesium-carbonate-doped magnesium oxide has been shown to be a prospective candidate for pre-combustion CO2 capture at temperatures between 300 and 410°C. Materials were synthesized by wet mixing commercially available materials as well as a solvothermal approach using a magnesium methoxide in methanol solution. The materials were activated by heat treatment at 600-610°C to yield the active CO2 sorbent. The sorbents showed working capacities of around 4 wt % in up to 25 partial pressure swing (12 min of sorption and 24 min of desorption) cycles. If the cesium carbonate was dissolved in the magnesium methoxide solution before solvothermal synthesis, multi-cyclic working capacities were increased to 5 wt %. Brunauer-Emmett-Teller surface area measurements of the activated materials showed that the solvothermal method led to materials with higher surface areas of ∼13 m 2/g, as compared to 3.4 m2/g if made from commercial MgO. Transmission electron microscopy showed the morphology of the activated solvothermally mixed materials to consist of spheres of approximately 50 nm diameter, with crystallinity increasing during heat treatment. Powder X-ray diffraction results confirmed this result and also proposed a similar chemistry during CO2 sorption of the solvothermally synthesized materials compared to the materials made from commercial precursors. Fourier transform infrared spectroscopy shows shifts in the carbonate ion spectra between the cesium carbonate precursor and the CO2-saturated mixed sorbent, indicating different carbonates in both of these materials. Elemental mapping using scanning transmission electron microscopy showed a uniform distribution of cesium and magnesium in the sample, with occasional clustering of cesium being visible in some particles. It appears that cesium carbonate addition into the solvothermal process created a better mixture of Cs and Mg in the particle than wet mixing onto dispersed particles. This led to the creation of a higher number of active sorption sites and, thus, a higher capacity for CO2 sorption.

Original languageEnglish (US)
Pages (from-to)5284-5295
Number of pages12
JournalEnergy and Fuels
Volume28
Issue number8
DOIs
StatePublished - Aug 21 2014
Externally publishedYes

Fingerprint

Magnesium Oxide
Magnesia
Cesium
Sorbents
Carbon Dioxide
Sorption
Carbonates
Carbon dioxide
Magnesium
Heat treatment
Transmission electron microscopy
cesium carbonate
Partial pressure
X ray powder diffraction
Fourier transform infrared spectroscopy
Methanol
Desorption
Ions

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

Improvements in the pre-combustion carbon dioxide sorption capacity of a magnesium oxide-cesium carbonate sorbent. / Vogt, Christian; Chang, Lan-Yun; Taghavimoghaddam, Jamileh; Chaffee, Alan L.

In: Energy and Fuels, Vol. 28, No. 8, 21.08.2014, p. 5284-5295.

Research output: Contribution to journalArticle

Vogt, Christian ; Chang, Lan-Yun ; Taghavimoghaddam, Jamileh ; Chaffee, Alan L. / Improvements in the pre-combustion carbon dioxide sorption capacity of a magnesium oxide-cesium carbonate sorbent. In: Energy and Fuels. 2014 ; Vol. 28, No. 8. pp. 5284-5295.
@article{c856c3cab3254919b00ab85fc419f4ff,
title = "Improvements in the pre-combustion carbon dioxide sorption capacity of a magnesium oxide-cesium carbonate sorbent",
abstract = "Cesium-carbonate-doped magnesium oxide has been shown to be a prospective candidate for pre-combustion CO2 capture at temperatures between 300 and 410°C. Materials were synthesized by wet mixing commercially available materials as well as a solvothermal approach using a magnesium methoxide in methanol solution. The materials were activated by heat treatment at 600-610°C to yield the active CO2 sorbent. The sorbents showed working capacities of around 4 wt {\%} in up to 25 partial pressure swing (12 min of sorption and 24 min of desorption) cycles. If the cesium carbonate was dissolved in the magnesium methoxide solution before solvothermal synthesis, multi-cyclic working capacities were increased to 5 wt {\%}. Brunauer-Emmett-Teller surface area measurements of the activated materials showed that the solvothermal method led to materials with higher surface areas of ∼13 m 2/g, as compared to 3.4 m2/g if made from commercial MgO. Transmission electron microscopy showed the morphology of the activated solvothermally mixed materials to consist of spheres of approximately 50 nm diameter, with crystallinity increasing during heat treatment. Powder X-ray diffraction results confirmed this result and also proposed a similar chemistry during CO2 sorption of the solvothermally synthesized materials compared to the materials made from commercial precursors. Fourier transform infrared spectroscopy shows shifts in the carbonate ion spectra between the cesium carbonate precursor and the CO2-saturated mixed sorbent, indicating different carbonates in both of these materials. Elemental mapping using scanning transmission electron microscopy showed a uniform distribution of cesium and magnesium in the sample, with occasional clustering of cesium being visible in some particles. It appears that cesium carbonate addition into the solvothermal process created a better mixture of Cs and Mg in the particle than wet mixing onto dispersed particles. This led to the creation of a higher number of active sorption sites and, thus, a higher capacity for CO2 sorption.",
author = "Christian Vogt and Lan-Yun Chang and Jamileh Taghavimoghaddam and Chaffee, {Alan L.}",
year = "2014",
month = "8",
day = "21",
doi = "10.1021/ef500834b",
language = "English (US)",
volume = "28",
pages = "5284--5295",
journal = "Energy and Fuels",
issn = "0887-0624",
publisher = "American Chemical Society",
number = "8",

}

TY - JOUR

T1 - Improvements in the pre-combustion carbon dioxide sorption capacity of a magnesium oxide-cesium carbonate sorbent

AU - Vogt, Christian

AU - Chang, Lan-Yun

AU - Taghavimoghaddam, Jamileh

AU - Chaffee, Alan L.

PY - 2014/8/21

Y1 - 2014/8/21

N2 - Cesium-carbonate-doped magnesium oxide has been shown to be a prospective candidate for pre-combustion CO2 capture at temperatures between 300 and 410°C. Materials were synthesized by wet mixing commercially available materials as well as a solvothermal approach using a magnesium methoxide in methanol solution. The materials were activated by heat treatment at 600-610°C to yield the active CO2 sorbent. The sorbents showed working capacities of around 4 wt % in up to 25 partial pressure swing (12 min of sorption and 24 min of desorption) cycles. If the cesium carbonate was dissolved in the magnesium methoxide solution before solvothermal synthesis, multi-cyclic working capacities were increased to 5 wt %. Brunauer-Emmett-Teller surface area measurements of the activated materials showed that the solvothermal method led to materials with higher surface areas of ∼13 m 2/g, as compared to 3.4 m2/g if made from commercial MgO. Transmission electron microscopy showed the morphology of the activated solvothermally mixed materials to consist of spheres of approximately 50 nm diameter, with crystallinity increasing during heat treatment. Powder X-ray diffraction results confirmed this result and also proposed a similar chemistry during CO2 sorption of the solvothermally synthesized materials compared to the materials made from commercial precursors. Fourier transform infrared spectroscopy shows shifts in the carbonate ion spectra between the cesium carbonate precursor and the CO2-saturated mixed sorbent, indicating different carbonates in both of these materials. Elemental mapping using scanning transmission electron microscopy showed a uniform distribution of cesium and magnesium in the sample, with occasional clustering of cesium being visible in some particles. It appears that cesium carbonate addition into the solvothermal process created a better mixture of Cs and Mg in the particle than wet mixing onto dispersed particles. This led to the creation of a higher number of active sorption sites and, thus, a higher capacity for CO2 sorption.

AB - Cesium-carbonate-doped magnesium oxide has been shown to be a prospective candidate for pre-combustion CO2 capture at temperatures between 300 and 410°C. Materials were synthesized by wet mixing commercially available materials as well as a solvothermal approach using a magnesium methoxide in methanol solution. The materials were activated by heat treatment at 600-610°C to yield the active CO2 sorbent. The sorbents showed working capacities of around 4 wt % in up to 25 partial pressure swing (12 min of sorption and 24 min of desorption) cycles. If the cesium carbonate was dissolved in the magnesium methoxide solution before solvothermal synthesis, multi-cyclic working capacities were increased to 5 wt %. Brunauer-Emmett-Teller surface area measurements of the activated materials showed that the solvothermal method led to materials with higher surface areas of ∼13 m 2/g, as compared to 3.4 m2/g if made from commercial MgO. Transmission electron microscopy showed the morphology of the activated solvothermally mixed materials to consist of spheres of approximately 50 nm diameter, with crystallinity increasing during heat treatment. Powder X-ray diffraction results confirmed this result and also proposed a similar chemistry during CO2 sorption of the solvothermally synthesized materials compared to the materials made from commercial precursors. Fourier transform infrared spectroscopy shows shifts in the carbonate ion spectra between the cesium carbonate precursor and the CO2-saturated mixed sorbent, indicating different carbonates in both of these materials. Elemental mapping using scanning transmission electron microscopy showed a uniform distribution of cesium and magnesium in the sample, with occasional clustering of cesium being visible in some particles. It appears that cesium carbonate addition into the solvothermal process created a better mixture of Cs and Mg in the particle than wet mixing onto dispersed particles. This led to the creation of a higher number of active sorption sites and, thus, a higher capacity for CO2 sorption.

UR - http://www.scopus.com/inward/record.url?scp=84906491319&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84906491319&partnerID=8YFLogxK

U2 - 10.1021/ef500834b

DO - 10.1021/ef500834b

M3 - Article

VL - 28

SP - 5284

EP - 5295

JO - Energy and Fuels

JF - Energy and Fuels

SN - 0887-0624

IS - 8

ER -