서브메뉴
검색
Towards Nitrogen Rich, Porous Carbons for Selective Carbon Dioxide Capture
Towards Nitrogen Rich, Porous Carbons for Selective Carbon Dioxide Capture
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153110
- ISBN
- 9798384443087
- DDC
- 551.5
- 서명/저자
- Towards Nitrogen Rich, Porous Carbons for Selective Carbon Dioxide Capture
- 발행사항
- [Sl] : The University of Texas at Austin, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 308 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
- 주기사항
- Advisor: Mullins, C. Buddie.
- 학위논문주기
- Thesis (Ph.D.)--The University of Texas at Austin, 2024.
- 초록/해제
- 요약To avoid the most detrimental impacts of climate change, decarbonization technologies such as carbon capture and storage (CCS) must be rapidly implemented. A variety of candidate technologies for CCS can enable capture of carbon dioxide (CO2) from the flue gas of a natural gas combined cycle power plant. Among these, separation via swing adsorption with solid-state porous adsorbents is speculated to incur relatively low energy costs. Activated carbons are a promising class of solid-state adsorbents that can be produced cheaply and sustainably, requiring modest energy for regeneration. Ultimately it is the goal of this dissertation to develop an understanding of selective adsorption of CO2 at low pressures (0.04-0.15 bar) near 30 °C. By synthesizing large arrays of carbons, deeper insights into porosity formation and the impacts of pore geometry on adsorption was developed. Applying these findings enabled synthetic protocols were significant changes in porosity at fixed nitrogen contents could be achieved. Through detailed characterization of the collection of activated carbons, structure-function relationships were developed to better understand properties which drive selective CO2 adsorption. These relationships suggest that the interlayer distance between carbon sheets is critical for the selective uptake of CO2 over N2 via a "size-sieving" mechanism which excludes the larger N2 molecule from an adsorption site. Interestingly, in the context of ambient temp CO2 and N2 adsorption only the smallest types of pores seem essential to describe adsorption behavior. Lastly, rigorous thermodynamic analysis was performed to understand the fundamentals of CO2 and N2 adsorption on these heterogenous surface. We find that for these small molecules which physisorb to the surface, consideration of heats of adsorption is insufficient to describe the adsorption behavior, and entropic considerations are necessary.
- 일반주제명
- Atmospheric chemistry
- 일반주제명
- Thermodynamics
- 일반주제명
- Atmospheric sciences
- 일반주제명
- Climate change
- 일반주제명
- Molecular chemistry
- 키워드
- Decarbonization
- 키워드
- Carbon dioxide
- 기타저자
- The University of Texas at Austin Chemistry
- 기본자료저록
- Dissertations Abstracts International. 86-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017164983
■00520250211153110
■006m o d
■007cr#unu||||||||
■020 ▼a9798384443087
■035 ▼a(MiAaPQ)AAI31690633
■035 ▼a(MiAaPQ)123vireo24493Eichler
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a551.5
■1001 ▼aEichler, John Ehren.
■24510▼aTowards Nitrogen Rich, Porous Carbons for Selective Carbon Dioxide Capture
■260 ▼a[Sl]▼bThe University of Texas at Austin▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a308 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-04, Section: B.
■500 ▼aAdvisor: Mullins, C. Buddie.
■5021 ▼aThesis (Ph.D.)--The University of Texas at Austin, 2024.
■520 ▼aTo avoid the most detrimental impacts of climate change, decarbonization technologies such as carbon capture and storage (CCS) must be rapidly implemented. A variety of candidate technologies for CCS can enable capture of carbon dioxide (CO2) from the flue gas of a natural gas combined cycle power plant. Among these, separation via swing adsorption with solid-state porous adsorbents is speculated to incur relatively low energy costs. Activated carbons are a promising class of solid-state adsorbents that can be produced cheaply and sustainably, requiring modest energy for regeneration. Ultimately it is the goal of this dissertation to develop an understanding of selective adsorption of CO2 at low pressures (0.04-0.15 bar) near 30 °C. By synthesizing large arrays of carbons, deeper insights into porosity formation and the impacts of pore geometry on adsorption was developed. Applying these findings enabled synthetic protocols were significant changes in porosity at fixed nitrogen contents could be achieved. Through detailed characterization of the collection of activated carbons, structure-function relationships were developed to better understand properties which drive selective CO2 adsorption. These relationships suggest that the interlayer distance between carbon sheets is critical for the selective uptake of CO2 over N2 via a "size-sieving" mechanism which excludes the larger N2 molecule from an adsorption site. Interestingly, in the context of ambient temp CO2 and N2 adsorption only the smallest types of pores seem essential to describe adsorption behavior. Lastly, rigorous thermodynamic analysis was performed to understand the fundamentals of CO2 and N2 adsorption on these heterogenous surface. We find that for these small molecules which physisorb to the surface, consideration of heats of adsorption is insufficient to describe the adsorption behavior, and entropic considerations are necessary.
■590 ▼aSchool code: 0227.
■650 4▼aAtmospheric chemistry
■650 4▼aThermodynamics
■650 4▼aAtmospheric sciences
■650 4▼aClimate change
■650 4▼aMolecular chemistry
■653 ▼aDecarbonization
■653 ▼aCarbon capture and storage
■653 ▼aCarbon dioxide
■653 ▼aSynthetic protocols
■653 ▼aStructure-function relationships
■690 ▼a0431
■690 ▼a0404
■690 ▼a0348
■690 ▼a0371
■690 ▼a0725
■71020▼aThe University of Texas at Austin▼bChemistry.
■7730 ▼tDissertations Abstracts International▼g86-04B.
■790 ▼a0227
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164983▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
