목질계 바이오매스 열분해 및 이산화탄소 가스화

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바이오매스, 열분해, 가스화, 타르, 촤
The energy demand is increasing due to the increase of population and economic development globally. Nowadays, energy supply is mostly comprised by coal, petroleum, and natural gas. However, those fossil energy are limited, in addition it has the severity problem about the environment.
In case of Korea highly depends on the other countries for the energy resources and therefore the alternative energy development is urgent. Biomass-derived energy also holds the promise of reducing emissions of carbon dioxide which is significant contributor to global warming. Also, biomass can be converted to various forms of energy through thermochemical conversion processes.
In this study, a screw pyrolyzer was designed and manufactured for wood biomass gasification. The wood biomass was used as a waste wood chip, and experiments in the pyrolysis and CO2 gasification were achieved in the products of producer gas, tar, and char.
The test was performed for the pyrolysis and CO2 gasification. The pyrolysis was conducted according to the variation of temperature for the comparison in the CO2 gasification. For the CO2 gasification test, parametic studies were conducted for temperature, water content, and amount of CO2.
The producer gas increased and tar decreased with increasing the gasification temperature. The producer gas of H2 and CO increased and tar decreased with increasing the moisture content by tar steam gasification and water-gas reaction. H2 decreased and CO increased by the reverse water-gas shift reaction and Boudouard reaction with an increase of CO2 feeding. And gravimetric tar increased due to reducing the thermal cracking while light tar production decreased.
A comparison between the pyrolysis and CO2 gasification was achieved. The CO2 gasification is better to get a good quality char having a lot of pores and specific surface. This is because the CO2 gives to make the Boudouard reactions with carbon on the char in the high temperature. And the producer gas had large amount of carbon monoxide.
Alternative Title
Pyrolysis and Carbon Dioxide Gasification for a Wood Biomass
Alternative Author(s)
Ji, Dae Won
조선대학교 대학원
일반대학원 환경공학과
Awarded Date
Table Of Contents
목 차

List of Tables ⅲ
List of Figures ⅳ

제1장 서론 1

제2장 이론적 고찰 4
제1절 바이오매스 4
1. 바이오에너지 4
2. 목질계 바이오매스 6
제2절 바이오매스의 열화학적 전환 11
1. 열분해(Pyrolysis) 메커니즘 11
2. 가스화(Gasification) 메커니즘 15
제3절 타르 16
1. 타르의 정의 및 분류 16
2. 바이오매스 열분해 공정에서 생성되는 타르의 형성 18
3. 타르 샘플링 방법 19

제3장 실험내용 및 방법 21
제1절 목질계 바이오매스 21
1. 원소 분석 22
2. 발열량 분석 22
3. TGA(Thermo Gravimetric Analyzer) 22
제2절 실험장치 및 방법 23
제3절 샘플링 및 분석 방법 26
1. 타르 샘플링 및 분석 26
2. 가스 샘플링 및 분석 28
3. BET 흡착 특성 28
4. 벤젠 흡착 특성 29
5. SEM(Scanning electron microscope) 30
제4절 반응식 31

제4장 결과 및 고찰 32
제1절 목질계 바이오매스의 특성 32
제2절 열분해 특성 35
1. 생성가스 35
2. 타르 37
3. 촤 43
제3절 CO2 가스화 특성 44
1. 가스화 온도 44
2. 함수율 53
3. CO2량 59
제4절 열분해 및 CO2 가스화 특성 비교 65
1. 생성가스 65
2. 타르 66
3. 촤 67

제5장 결론 70

참고문헌 72
조선대학교 대학원
지대원. (2013). 목질계 바이오매스 열분해 및 이산화탄소 가스화.
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