CO 2 capture over molecular basket sorbent

Sorption mechanism study

Xiaoxing Wang, Xiaoliang Ma, Viviane Schwartz, Jason C. Clark, Steven H. Overbury, Xiaochun Xu, Chunshan Song

Research output: Contribution to journalConference article

Abstract

Using solid sorbents to selectively capture CO 2 from various gas streams, especially from flue gas, is of critical importance in mitigating the greenhouse gas emissions, and is a promising alternative because of its great potential in lowering energy requirements for regeneration and operation, and the cost for the CO 2 separation process due to smaller process equipment, less expensive materials of construction, and inexpensive raw materials. In the past years, we have developed a novel sorbent material on the basis of molecular basket concept, so-called molecular basket sorbent (MBS). The sorbent has shown some potential advantages including high sorption capacity, high selectivity, fast CO 2 sorption/desorption kinetics, easy regeneration and positive effect of moisture. However, the CO 2 sorption mechanism over MBS is still not clear. As a continuous work, the present paper will report our current efforts and progress in the study of the fundamentals on CO 2 sorption mechanism over MBS material by using in-situ FT-IR, CO 2 temperature-programmed desorption method (CO 2-TPD) and the computational simulation. Through the study, two sorption species, surface carbamate species and chemically sorbed CO 2 molecules within the sorbent bulk have been recognized by in-situ FT-IR. And two desorption stages, i.e. for the desorption of carbamate species and chemically sorbed CO 2 molecules, and two sorption regions, i.e. kinetically and thermodynamically controlled regions in CO 2 sorption over PEI/SBA-15 have also been identified and clarified. The CO 2 sorption mechanism over MBS has consequently been proposed.

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
StatePublished - Dec 1 2011

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Carbon Monoxide
Sorbents
Sorption
Desorption
Carbamates
Polyetherimides
Molecules
Temperature programmed desorption
Gas emissions
Flue gases
Greenhouse gases
Raw materials
Moisture
Gases
Kinetics
Costs

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Wang, Xiaoxing ; Ma, Xiaoliang ; Schwartz, Viviane ; Clark, Jason C. ; Overbury, Steven H. ; Xu, Xiaochun ; Song, Chunshan. / CO 2 capture over molecular basket sorbent : Sorption mechanism study. In: ACS National Meeting Book of Abstracts. 2011.
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title = "CO 2 capture over molecular basket sorbent: Sorption mechanism study",
abstract = "Using solid sorbents to selectively capture CO 2 from various gas streams, especially from flue gas, is of critical importance in mitigating the greenhouse gas emissions, and is a promising alternative because of its great potential in lowering energy requirements for regeneration and operation, and the cost for the CO 2 separation process due to smaller process equipment, less expensive materials of construction, and inexpensive raw materials. In the past years, we have developed a novel sorbent material on the basis of molecular basket concept, so-called molecular basket sorbent (MBS). The sorbent has shown some potential advantages including high sorption capacity, high selectivity, fast CO 2 sorption/desorption kinetics, easy regeneration and positive effect of moisture. However, the CO 2 sorption mechanism over MBS is still not clear. As a continuous work, the present paper will report our current efforts and progress in the study of the fundamentals on CO 2 sorption mechanism over MBS material by using in-situ FT-IR, CO 2 temperature-programmed desorption method (CO 2-TPD) and the computational simulation. Through the study, two sorption species, surface carbamate species and chemically sorbed CO 2 molecules within the sorbent bulk have been recognized by in-situ FT-IR. And two desorption stages, i.e. for the desorption of carbamate species and chemically sorbed CO 2 molecules, and two sorption regions, i.e. kinetically and thermodynamically controlled regions in CO 2 sorption over PEI/SBA-15 have also been identified and clarified. The CO 2 sorption mechanism over MBS has consequently been proposed.",
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CO 2 capture over molecular basket sorbent : Sorption mechanism study. / Wang, Xiaoxing; Ma, Xiaoliang; Schwartz, Viviane; Clark, Jason C.; Overbury, Steven H.; Xu, Xiaochun; Song, Chunshan.

In: ACS National Meeting Book of Abstracts, 01.12.2011.

Research output: Contribution to journalConference article

TY - JOUR

T1 - CO 2 capture over molecular basket sorbent

T2 - Sorption mechanism study

AU - Wang, Xiaoxing

AU - Ma, Xiaoliang

AU - Schwartz, Viviane

AU - Clark, Jason C.

AU - Overbury, Steven H.

AU - Xu, Xiaochun

AU - Song, Chunshan

PY - 2011/12/1

Y1 - 2011/12/1

N2 - Using solid sorbents to selectively capture CO 2 from various gas streams, especially from flue gas, is of critical importance in mitigating the greenhouse gas emissions, and is a promising alternative because of its great potential in lowering energy requirements for regeneration and operation, and the cost for the CO 2 separation process due to smaller process equipment, less expensive materials of construction, and inexpensive raw materials. In the past years, we have developed a novel sorbent material on the basis of molecular basket concept, so-called molecular basket sorbent (MBS). The sorbent has shown some potential advantages including high sorption capacity, high selectivity, fast CO 2 sorption/desorption kinetics, easy regeneration and positive effect of moisture. However, the CO 2 sorption mechanism over MBS is still not clear. As a continuous work, the present paper will report our current efforts and progress in the study of the fundamentals on CO 2 sorption mechanism over MBS material by using in-situ FT-IR, CO 2 temperature-programmed desorption method (CO 2-TPD) and the computational simulation. Through the study, two sorption species, surface carbamate species and chemically sorbed CO 2 molecules within the sorbent bulk have been recognized by in-situ FT-IR. And two desorption stages, i.e. for the desorption of carbamate species and chemically sorbed CO 2 molecules, and two sorption regions, i.e. kinetically and thermodynamically controlled regions in CO 2 sorption over PEI/SBA-15 have also been identified and clarified. The CO 2 sorption mechanism over MBS has consequently been proposed.

AB - Using solid sorbents to selectively capture CO 2 from various gas streams, especially from flue gas, is of critical importance in mitigating the greenhouse gas emissions, and is a promising alternative because of its great potential in lowering energy requirements for regeneration and operation, and the cost for the CO 2 separation process due to smaller process equipment, less expensive materials of construction, and inexpensive raw materials. In the past years, we have developed a novel sorbent material on the basis of molecular basket concept, so-called molecular basket sorbent (MBS). The sorbent has shown some potential advantages including high sorption capacity, high selectivity, fast CO 2 sorption/desorption kinetics, easy regeneration and positive effect of moisture. However, the CO 2 sorption mechanism over MBS is still not clear. As a continuous work, the present paper will report our current efforts and progress in the study of the fundamentals on CO 2 sorption mechanism over MBS material by using in-situ FT-IR, CO 2 temperature-programmed desorption method (CO 2-TPD) and the computational simulation. Through the study, two sorption species, surface carbamate species and chemically sorbed CO 2 molecules within the sorbent bulk have been recognized by in-situ FT-IR. And two desorption stages, i.e. for the desorption of carbamate species and chemically sorbed CO 2 molecules, and two sorption regions, i.e. kinetically and thermodynamically controlled regions in CO 2 sorption over PEI/SBA-15 have also been identified and clarified. The CO 2 sorption mechanism over MBS has consequently been proposed.

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SN - 0065-7727

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