Thermal Stability-Enhanced Hollow Fiber Sorbents for Post-Combustion CO2 Capture
- 주제(키워드) Carbon dioxide capture and sequestration (CCS) , Post-combustion CO2 capture , CO2 adsorption , porous silica , epoxide-polyethyleneimine , poly(amindeimide) (PAI) , hollow fiber sorbents (HFSs) , Neoprene , impermeable lumen layer , Rapid thermal swing adsorption (RTSA)
- 발행기관 고려대학교 대학원
- 지도교수 이정현
- 발행년도 2018
- 학위수여년월 2018. 2
- 학위구분 석사
- 학과 대학원 화공생명공학과
- 원문페이지 91 p
- 실제URI http://www.dcollection.net/handler/korea/000000080755
- 본문언어 영어
- 제출원본 000045932715
초록/요약
As the importance of carbon dioxide capture has increased, several processes have been proposed. Among them, the rapid Thermal swing adsorption (RTSA) process using hollow fiber sorbents has a merit of high energy efficiency. Unlike previous researches on hollow fiber sorbents, this study focuses on material development considering process. Epoxide functionalized PEI was introduced into PAI/silica hybrid fiber to enable desorption at 100% CO2. We also compared Stainless-steel (S-S) and polytetrafluoroethylene (PTFE) as modular materials to minimize the effect of heat transfer on the module in the RTSA process. The CO2 adsorption capacity evaluation was carried out through a multi-component system, which is simulating the post-combustion CO2 capture. Gas components from the module exit were analyzed by mass spectrometry. The adsorption-desorption cyclic test was performed by flowing 35 oC cooling water and 120 oC hot steam through the bore side of the fiber. Heat transfer is rapid and efficient because heat transfer is through the thin wall thickness of hollow fiber sorbents. Total 5 cycles of swing capacity were measured to confirm long-term stability and PAI/silica/0.37EB-PEI fiber was maintained at 0.42 mmol CO2/g-fiber for 8 min/cycle.
more목차
CHAPTER 1. RESEARCH BACKGROUND 1
1.1 Introduction to CO2 Capture 1
1.2 Methods for Post-combustion CO2 Capture 6
1.3 Hollows Fiber Sorbents (HFSs) using rapid thermal swing adsorption (RTSA) process 7
1.4 References 9
CHAPTER 2. MATERIALS AND EXPERIMENTAL METHODS 11
2.1 Materials 11
2.2 Experimental Methods 11
2.2.1 Synthesis of Spray-dried Silica 11
2.2.2 Formation of Hollow Fiber Sorbents 13
2.2.3 Preparation of Hollow Fiber Sorbents Using Impregnation Method 18
2.2.4 Formation of Lumen Layer 18
2.3 Characterization of CO2 Sorbents 20
2.3.1 CO2 Adsorption Capacity by Using TGA 20
2.3.2 CO2 Adsorption-Desorption Test Using Multi-component System 20
2.4 Supplementary Characterizations 24
2.4.1 Brunauer-Emmett-Teller (BET) 24
2.4.2 Nuclear Magnetic Resonance (NMR) 24
2.4.3 Fourier Transform Infrared Spectroscopy (FT-IR) 24
2.4.4 Scanning Electron Microscopy (SEM) and Energy X-ray Spectroscopy (EDX) 24
2.4.5 Thermogravimetric Analysis (TGA) 24
2.4.6 Element Analyzer (EA) 25
2.4.7 Gas Permeances 25
2.5 Theory 27
2.6 References 30
CHAPTER 3. Optimization of RTSA Process Using Hollow Fiber Sorbents 31
3.1 Introduction 31
3.2 Results and Discussion 32
3.2.1 Characterization of Hollow Fiber Sorbents 33
3.2.2 Impermeable lumen layer 41
3.2.3 Assembly 47
3.2.4 Effect of Cooling Water on Adsorption Stage 52
3.2.5 Effect of module materials on Adsorption stage 54
3.2.6 Effect of module materials on Desorption stage 56
3.2.7 Effect of module materials on Cooling stage 61
3.2.8 Optimization on Sweeping stage 63
3.2.9 Cyclic RTSA test using thermal fluids 67
3.2.10 Energy demand of RTSA process 70
3.3 Summary 73
3.4 References 74
