본문

서브메뉴

Impacts of Humidity and Degradation on Adsorbents for Co2 Capture
Impacts of Humidity and Degradation on Adsorbents for Co2 Capture
Impacts of Humidity and Degradation on Adsorbents for Co2 Capture

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105523
ISBN  
9798263339548
DDC  
547.84
저자명  
Holmes, Hannah E.
서명/저자  
Impacts of Humidity and Degradation on Adsorbents for Co2 Capture
발행사항  
[Sl] : Georgia Institute of Technology, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
548 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Lively, Ryan P.;Realff, Matthew J.
학위논문주기  
Thesis (Ph.D.)--Georgia Institute of Technology, 2024.
초록/해제  
요약Without immediate and widespread reductions in CO2 emissions, a global warming of 2 °C will be reached by the middle of the 21st century. The global temperature increase will have consequences related to all aspects of our society, including the environment, human health, food and water security, and the economy. Thus, ensuring that carbon capture technologies are at the scale and maturity necessary for rapid and widescale deployment is critical. Advancements in solid sorbent technology have the potential to influence the cost of CO2 capture technologies significantly, particularly in three key areas: sorbent degradation, interactions with humidity, and integration into structured contactors.First, economic models were developed to assess the impact of sorbent degradation on the viability of two carbon capture processes, direct air capture (DAC) and bioenergy with carbon capture and storage (BECCS). By employing a capacity fade model, optimum sorbent replacement times were determined, balancing system performance, costeffectiveness, and environmental impact. The results of the economic models emphasize that future focus should be placed on increasing the stability and lifetime of adsorbents. For DAC, it was determined that sorbent degradation not only increases the process cost but also escalates carbon footprints, especially when carbon-intensive energy sources are used. For BECCS, an optimal heat of adsorption was proposed by balancing the adsorbateadsorbent affinity with the energy required for regeneration.While it is likely that some of the many adsorbents already proposed for other postcombustion CO2 capture processes could be used for BECCS, it is not clear which adsorbents will be stable in the flue gas long enough to be economically viable. As a preliminary investigation, we directly exposed adsorbents commonly reported in literature to flue gas from biomass combustion. Pre- and post-exposure characterization of the sorbents revealed three responses to the flue gas exposure: no degradation, mechanical degradation, and chemical degradation. The results highlight the range of possible degradation mechanisms in BECCS due to structural differences in adsorbents and emphasize the need for stability research and mitigation strategies.The exhaust gas from natural gas combined cycle power plants typically contains approximately 74.4% N2, 12.4% O2, 8.4% H2O, 3.9% CO2, and 0.9% Ar, so materials developed for carbon capture from those streams must be able to adsorb appreciable amounts of CO2 at 0.04 bar and high humidity while remaining stable. Here, we first demonstrated that the addition of nucleophilic N2-rich guanidine groups to the backbone of PIM-1 can mitigate amine impregnation issues and further enhance CO2 chemisorption in the presence of humidity. Excellent performance and stability were achieved by cycling at lower temperatures, establishing PIM-guanidine as a promising candidate for scale-up in all-polymer contactors for NGCC CO2 capture.Diamine-appended M2(dobpdc) metal-organic frameworks (MOFs) are another promising class of CO2 adsorbents, but the influence of relative humidity (RH) on their adsorption performance had yet to be carefully studied. We evaluated the CO2 uptake of (2-ampd)2M2(dobpdc) at varying relative humidities and associated water loadings. A significant enhancement in uptake was identified between 20 and 40% RH, with an optimum of 30% RH, at which a maximum CO2 uptake of 5.7 ± 0.2 mmol/g is achieved at 0.044 atm of CO2. An additional sorption mechanism promoted by humidity was investigated using in-situ DRIFTS IR and temperature-programmed desorption.Implementing adsorbents into structured contactors is crucial for lowering the cost of CO2 capture. However, translating powder materials into contactors that maintain the CO2 capacity of the adsorbent and that can be used with thermal management poses challenges due to issues with adsorbent stability and the necessity of using high amounts of inactive polymers or binders during fabrication. We developed fabrication methods to successfully fabricate fiber sorbents and monoliths containing a diamine-appended M2(dobpdc) MOF. The unique, stepped adsorption behavior of the MOF was maintained in contactors. Allpolymer hollow fibers containing PIM-guanidine were also successfully fabricated, addressing the energy and productivity consequences of inactive materials in contactors.By lowering the cost of CO2 capture technologies, the insights provided here help facilitate the rapid and widescale deployment that will be vital for limiting the global temperature increase. The results also provide a foundation for further advancements in understanding, controlling, and utilizing the impacts of humidity and degradation on CO2 capture processes, which is crucial for their success.
일반주제명  
Cellulose acetate
일반주제명  
Humidity
일반주제명  
Thermal energy
일반주제명  
Adsorbents
일반주제명  
Thermogravimetric analysis
일반주제명  
Adsorption
일반주제명  
Water
일반주제명  
Decomposition
일반주제명  
Heat
일반주제명  
Carbon footprint
일반주제명  
Biomass
일반주제명  
Environmental impact
일반주제명  
Energy resources
일반주제명  
Zeolites
일반주제명  
Polymers
일반주제명  
Gases
일반주제명  
Electricity
일반주제명  
Sorbents
일반주제명  
Solvents
일반주제명  
Dehydration
일반주제명  
Chemical engineering
일반주제명  
Industrial engineering
일반주제명  
Polymer chemistry
기타저자  
Georgia Institute of Technology.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260126s2024        us                              c    eng  d
■001000017360425
■00520260202105523
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798263339548
■035    ▼a(MiAaPQ)AAI32309706
■035    ▼a(MiAaPQ)GeorgiaTech77711
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a547.84
■1001  ▼aHolmes,  Hannah  E.
■24510▼aImpacts  of  Humidity  and  Degradation  on  Adsorbents  for  Co2  Capture
■260    ▼a[Sl]▼bGeorgia  Institute  of  Technology▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a548  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Lively,  Ryan  P.;Realff,  Matthew  J.
■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2024.
■520    ▼aWithout  immediate  and  widespread  reductions  in  CO2  emissions,  a  global  warming  of  2  °C  will  be  reached  by  the  middle  of  the  21st  century.  The  global  temperature  increase  will  have  consequences  related  to  all  aspects  of  our  society,  including  the  environment,  human  health,  food  and  water  security,  and  the  economy.  Thus,  ensuring  that  carbon  capture  technologies  are  at  the  scale  and  maturity  necessary  for  rapid  and  widescale  deployment  is  critical.  Advancements  in  solid  sorbent  technology  have  the  potential  to  influence  the  cost  of  CO2  capture  technologies  significantly,  particularly  in  three  key  areas:  sorbent  degradation,  interactions  with  humidity,  and  integration  into  structured  contactors.First,  economic  models  were  developed  to  assess  the  impact  of  sorbent  degradation  on  the  viability  of  two  carbon  capture  processes,  direct  air  capture  (DAC)  and  bioenergy  with  carbon  capture  and  storage  (BECCS).  By  employing  a  capacity  fade  model,  optimum  sorbent  replacement  times  were  determined,  balancing  system  performance,  costeffectiveness,  and  environmental  impact.  The  results  of  the  economic  models  emphasize  that  future  focus  should  be  placed  on  increasing  the  stability  and  lifetime  of  adsorbents.  For  DAC,  it  was  determined  that  sorbent  degradation  not  only  increases  the  process  cost  but  also  escalates  carbon  footprints,  especially  when  carbon-intensive  energy  sources  are  used.  For  BECCS,  an  optimal  heat  of  adsorption  was  proposed  by  balancing  the  adsorbateadsorbent  affinity  with  the  energy  required  for  regeneration.While  it  is  likely  that  some  of  the  many  adsorbents  already  proposed  for  other  postcombustion  CO2  capture  processes  could  be  used  for  BECCS,  it  is  not  clear  which  adsorbents  will  be  stable  in  the  flue  gas  long  enough  to  be  economically  viable.  As  a  preliminary  investigation,  we  directly  exposed  adsorbents  commonly  reported  in  literature  to  flue  gas  from  biomass  combustion.  Pre-  and  post-exposure  characterization  of  the  sorbents  revealed  three  responses  to  the  flue  gas  exposure:  no  degradation,  mechanical  degradation,  and  chemical  degradation.  The  results  highlight  the  range  of  possible  degradation  mechanisms  in  BECCS  due  to  structural  differences  in  adsorbents  and  emphasize  the  need  for  stability  research  and  mitigation  strategies.The  exhaust  gas  from  natural  gas  combined  cycle  power  plants  typically  contains  approximately  74.4%  N2,  12.4%  O2,  8.4%  H2O,  3.9%  CO2,  and  0.9%  Ar,  so  materials  developed  for  carbon  capture  from  those  streams  must  be  able  to  adsorb  appreciable  amounts  of  CO2  at  0.04  bar  and  high  humidity  while  remaining  stable.  Here,  we  first  demonstrated  that  the  addition  of  nucleophilic  N2-rich  guanidine  groups  to  the  backbone  of  PIM-1  can  mitigate  amine  impregnation  issues  and  further  enhance  CO2  chemisorption  in  the  presence  of  humidity.  Excellent  performance  and  stability  were  achieved  by  cycling  at  lower  temperatures,  establishing  PIM-guanidine  as  a  promising  candidate  for  scale-up  in  all-polymer  contactors  for  NGCC  CO2  capture.Diamine-appended  M2(dobpdc)  metal-organic  frameworks  (MOFs)  are  another  promising  class  of  CO2  adsorbents,  but  the  influence  of  relative  humidity  (RH)  on  their  adsorption  performance  had  yet  to  be  carefully  studied.  We  evaluated  the  CO2  uptake  of  (2-ampd)2M2(dobpdc)  at  varying  relative  humidities  and  associated  water  loadings.  A  significant  enhancement  in  uptake  was  identified  between  20  and  40%  RH,  with  an  optimum  of  30%  RH,  at  which  a  maximum  CO2  uptake  of  5.7  ±  0.2  mmol/g  is  achieved  at  0.044  atm  of  CO2.  An  additional  sorption  mechanism  promoted  by  humidity  was  investigated  using  in-situ  DRIFTS  IR  and  temperature-programmed  desorption.Implementing  adsorbents  into  structured  contactors  is  crucial  for  lowering  the  cost  of  CO2  capture.  However,  translating  powder  materials  into  contactors  that  maintain  the  CO2  capacity  of  the  adsorbent  and  that  can  be  used  with  thermal  management  poses  challenges  due  to  issues  with  adsorbent  stability  and  the  necessity  of  using  high  amounts  of  inactive  polymers  or  binders  during  fabrication.  We  developed  fabrication  methods  to  successfully  fabricate  fiber  sorbents  and  monoliths  containing  a  diamine-appended  M2(dobpdc)  MOF.  The  unique,  stepped  adsorption  behavior  of  the  MOF  was  maintained  in  contactors.  Allpolymer  hollow  fibers  containing  PIM-guanidine  were  also  successfully  fabricated,  addressing  the  energy  and  productivity  consequences  of  inactive  materials  in  contactors.By  lowering  the  cost  of  CO2  capture  technologies,  the  insights  provided  here  help  facilitate  the  rapid  and  widescale  deployment  that  will  be  vital  for  limiting  the  global  temperature  increase.  The  results  also  provide  a  foundation  for  further  advancements  in  understanding,  controlling,  and  utilizing  the  impacts  of  humidity  and  degradation  on  CO2  capture  processes,  which  is  crucial  for  their  success.
■590    ▼aSchool  code:  0078.
■650  4▼aCellulose  acetate
■650  4▼aHumidity
■650  4▼aThermal  energy
■650  4▼aAdsorbents
■650  4▼aThermogravimetric  analysis
■650  4▼aAdsorption
■650  4▼aWater
■650  4▼aDecomposition
■650  4▼aHeat
■650  4▼aCarbon  footprint
■650  4▼aBiomass
■650  4▼aEnvironmental  impact
■650  4▼aEnergy  resources
■650  4▼aZeolites
■650  4▼aPolymers
■650  4▼aGases
■650  4▼aElectricity
■650  4▼aSorbents
■650  4▼aSolvents
■650  4▼aDehydration
■650  4▼aChemical  engineering
■650  4▼aIndustrial  engineering
■650  4▼aPolymer  chemistry
■690    ▼a0542
■690    ▼a0474
■690    ▼a0546
■690    ▼a0495
■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=T17360425▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

미리보기

내보내기

chatGPT토론

Ai 추천 관련 도서


    신착도서 더보기
    최근 3년간 통계입니다.

    소장정보

    • 예약
    • 소재불명신고
    • 나의폴더
    • 우선정리요청
    • 비도서대출신청
    • 야간 도서대출신청
    소장자료
    등록번호 청구기호 소장처 대출가능여부 대출정보
    TF17213 전자도서 대출가능 마이폴더 부재도서신고 비도서대출신청 야간 도서대출신청

    * 대출중인 자료에 한하여 예약이 가능합니다. 예약을 원하시면 예약버튼을 클릭하십시오.

    해당 도서를 다른 이용자가 함께 대출한 도서

    관련 인기도서

    로그인 후 이용 가능합니다.