서브메뉴
검색
Mixture Adsorption in Metal-Organic Frameworks for Biogas and Light Hydrocarbon Separation
Mixture Adsorption in Metal-Organic Frameworks for Biogas and Light Hydrocarbon Separation
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105330
- ISBN
- 9798263324742
- DDC
- 363.738
- 저자명
- Li, Chunyi.
- 서명/저자
- Mixture Adsorption in Metal-Organic Frameworks for Biogas and Light Hydrocarbon Separation
- 발행사항
- [Sl] : Georgia Institute of Technology, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 308 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Advisor: Lively, Ryan P.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2024.
- 초록/해제
- 요약As the global energy demand continues to increase, developing technologies to use renewable energy sources has become increasingly urgent. The development of biogas separation for biomethane production opens possibilities for renewable energy utilization. Biogas is versatile in terms of both production and utilization. It can be used for heat, power, and electricity generation in place of fossil fuels. Additionally, it can be integrated into areas where natural gas is used for vehicular fuel and chemical production. Along with the various biogas sources, numerous challenges are present with effective biogas separation. Biogas contains mainly carbon dioxide and methane, with low concentrations of contaminants such as hydrogen sulfide (H2S) and ammonia (NH3). In municipal landfill biogas, mercaptans and siloxanes are also present in trace amounts. In addition, biogas is saturated with water from the natural fermentation processes. Typical biogas utilization requires pre-drying and desulfurization. Specifically, the H2S concentration needs to be reduced to below 20 parts per million (ppm) for pipeline transportation from starting concentrations of above 3000 ppm.The desulfurization step is typically achieved by biologically oxidizing H2S into elemental sulfur. This process requires air injection and sometimes bacterial introduction. Despite the advantage of desulfurization inside the fermentation chamber, air injection lowers the heating value of biogas by introducing large quantities of nitrogen. Aqueous scrubbing using water or polyethylene glycol solutions faces the problem of producing large amounts of contaminated solutions and high-cost regeneration. Membrane separation is not ideal for desulfurization due to the low driving force from the low concentrations of contaminants. After drying and desulfurization, most of the CO2 is removed to produce higher-heating value biomethane. Adsorption using activated carbon requires low-cost operation, but the relatively low affinity to H2S and CO2 results in low adsorption selectivities over CH4.Much effort has been focused on developing sorbent materials for selective H2S and CO2 separation. There is a need to study the adsorption performance in realistic gas mixtures to understand the competitive adsorption behavior of gases. In this thesis, the mixture adsorption equilibrium of H2S and CO2 was studied using simulated biogas mixtures containing H2S, CO2, methane, and water vapor. The approach of this thesis is summarized in four objectives.The first objective investigates the chemical stability of metal-organic frameworks (MOFs) in H2S and CO2-containing environments. In Chapter 4, the chemical stability and structural stability of MIL-125-NH2 in the presence of dry H2S up is studied using in situ and ex situ characterization methods. In Chapter 6 and Chapter 7, the H2S adsorption performance in diamine-impregnated MIL-101(Cr) is studied in adsorption-desorption cycles using dry and humid simulated biogas mixtures. The effect of the type of diamine on the cyclic adsorption stability of H2S and CO2 is studied using diamines containing 1°,1° amines, 1°,2° amines, and 1°,3° amines. The study concludes that the impregnation of diamine in MIL-101(Cr) improves the cyclic adsorption stability of H2S. The second objective studies the effect of metal substitution on mixture adsorption equilibrium of ethylene and acetylene using isostructural MOFs. The production of ethylene from biomethane may contain trace amounts of acetylene and ethane. Acetylene is also a problematic contaminant in ethylene produced from naphtha cracking. Chapter 5 uses four isostructural MOFs based on rare-earth metals to study the acetylene/ethylene adsorption selectivity. The experimental results show that the pore size decrease across the rare-earth MOFs played a role in determining the acetylene/ethylene selectivity and acetylene adsorption capacity.
- 일반주제명
- Greenhouse gases
- 일반주제명
- Landfill
- 일반주제명
- Emissions
- 일반주제명
- Households
- 일반주제명
- Natural gas
- 일반주제명
- Alternative energy
- 일반주제명
- Climate change
- 일반주제명
- Petroleum engineering
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2024 us c eng d■001000017360262
■00520260202105330
■006m o d
■007cr#unu||||||||
■020 ▼a9798263324742
■035 ▼a(MiAaPQ)AAI32307943
■035 ▼a(MiAaPQ)GeorgiaTech78542
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a363.738
■1001 ▼aLi, Chunyi.
■24510▼aMixture Adsorption in Metal-Organic Frameworks for Biogas and Light Hydrocarbon Separation
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a308 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Lively, Ryan P.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2024.
■520 ▼aAs the global energy demand continues to increase, developing technologies to use renewable energy sources has become increasingly urgent. The development of biogas separation for biomethane production opens possibilities for renewable energy utilization. Biogas is versatile in terms of both production and utilization. It can be used for heat, power, and electricity generation in place of fossil fuels. Additionally, it can be integrated into areas where natural gas is used for vehicular fuel and chemical production. Along with the various biogas sources, numerous challenges are present with effective biogas separation. Biogas contains mainly carbon dioxide and methane, with low concentrations of contaminants such as hydrogen sulfide (H2S) and ammonia (NH3). In municipal landfill biogas, mercaptans and siloxanes are also present in trace amounts. In addition, biogas is saturated with water from the natural fermentation processes. Typical biogas utilization requires pre-drying and desulfurization. Specifically, the H2S concentration needs to be reduced to below 20 parts per million (ppm) for pipeline transportation from starting concentrations of above 3000 ppm.The desulfurization step is typically achieved by biologically oxidizing H2S into elemental sulfur. This process requires air injection and sometimes bacterial introduction. Despite the advantage of desulfurization inside the fermentation chamber, air injection lowers the heating value of biogas by introducing large quantities of nitrogen. Aqueous scrubbing using water or polyethylene glycol solutions faces the problem of producing large amounts of contaminated solutions and high-cost regeneration. Membrane separation is not ideal for desulfurization due to the low driving force from the low concentrations of contaminants. After drying and desulfurization, most of the CO2 is removed to produce higher-heating value biomethane. Adsorption using activated carbon requires low-cost operation, but the relatively low affinity to H2S and CO2 results in low adsorption selectivities over CH4.Much effort has been focused on developing sorbent materials for selective H2S and CO2 separation. There is a need to study the adsorption performance in realistic gas mixtures to understand the competitive adsorption behavior of gases. In this thesis, the mixture adsorption equilibrium of H2S and CO2 was studied using simulated biogas mixtures containing H2S, CO2, methane, and water vapor. The approach of this thesis is summarized in four objectives.The first objective investigates the chemical stability of metal-organic frameworks (MOFs) in H2S and CO2-containing environments. In Chapter 4, the chemical stability and structural stability of MIL-125-NH2 in the presence of dry H2S up is studied using in situ and ex situ characterization methods. In Chapter 6 and Chapter 7, the H2S adsorption performance in diamine-impregnated MIL-101(Cr) is studied in adsorption-desorption cycles using dry and humid simulated biogas mixtures. The effect of the type of diamine on the cyclic adsorption stability of H2S and CO2 is studied using diamines containing 1°,1° amines, 1°,2° amines, and 1°,3° amines. The study concludes that the impregnation of diamine in MIL-101(Cr) improves the cyclic adsorption stability of H2S. The second objective studies the effect of metal substitution on mixture adsorption equilibrium of ethylene and acetylene using isostructural MOFs. The production of ethylene from biomethane may contain trace amounts of acetylene and ethane. Acetylene is also a problematic contaminant in ethylene produced from naphtha cracking. Chapter 5 uses four isostructural MOFs based on rare-earth metals to study the acetylene/ethylene adsorption selectivity. The experimental results show that the pore size decrease across the rare-earth MOFs played a role in determining the acetylene/ethylene selectivity and acetylene adsorption capacity.
■590 ▼aSchool code: 0078.
■650 4▼aGreenhouse gases
■650 4▼aAlternative energy sources
■650 4▼aLandfill
■650 4▼aEmissions
■650 4▼aHouseholds
■650 4▼aNatural gas
■650 4▼aAlternative energy
■650 4▼aClimate change
■650 4▼aPetroleum engineering
■690 ▼a0363
■690 ▼a0404
■690 ▼a0765
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360262▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


