초록 ▼

o 목질계 바이오매스를 통합적으로 활용하여 차세대 바이오연료를 생산하기 위한 바이오·화학 융합 기술에서 요소기술별 연구내용 및 연구결과는 다음과 같음.
가. C6 슈가 기반 가솔린 연료 생산
-C5 이상 가솔린급 탄화수소 생산을 위한 C2~C4 바이오화합물 전구체 생산: 당 발효에 의한 아세톤-부탄올-에탄올 생산 수율 0.35 g/g 이상 달성
-아세톤-부탄올-에탄올의 화학적 전환을 통한 C5+ 가솔린급 탄화수소 연료 생산 : 아세톤 기반C5-C15 바이오가솔린 수율 80% 이상 달성
나. C6 슈가 기반 항공

o 목질계 바이오매스를 통합적으로 활용하여 차세대 바이오연료를 생산하기 위한 바이오·화학 융합 기술에서 요소기술별 연구내용 및 연구결과는 다음과 같음.
가. C6 슈가 기반 가솔린 연료 생산
-C5 이상 가솔린급 탄화수소 생산을 위한 C2~C4 바이오화합물 전구체 생산: 당 발효에 의한 아세톤-부탄올-에탄올 생산 수율 0.35 g/g 이상 달성
-아세톤-부탄올-에탄올의 화학적 전환을 통한 C5+ 가솔린급 탄화수소 연료 생산 : 아세톤 기반C5-C15 바이오가솔린 수율 80% 이상 달성
나. C6 슈가 기반 항공유 연료 생산
-세계 최초 C10 바이오물질, 미어신 생산 기술 개발
다. C5/C6 슈가 유도체 기반 디젤/가솔린 연료 생산
-C5 슈가 유래 퓨란 유도체로부터 고탄소 디젤 연료 생산 수율 88.1% 달성
-C5/C6 슈가 유래 퓨란 유도체로 가솔린급 방향족 탄화수소 생산 수율 82% 달성
라. 리그닌 기반 가솔린 연료 생산
-초임계용매/촉매 융합 기술을 통한 리그닌의 고수율/고품질 바이오오일 전환: 리그닌 액화 수율 57.3%, 잔사 수율 6.1%, 바이오오일 분자량 545 g/mol, 산소 함량 17.6% 달성
마. 공정 분석
-단위 공정 모사 및 상용화 가능성 검토
(출처 : 보고서 초록)

Abstract ▼

Ⅳ. Results
□ Production of C2~C4 bio-chemicals (yield > 0.35 g/g sugar)
- Among Clostridium strains which produce C2~C4 compounds (acetone-butanolethanol), Clostridium acetobutylicum ATCC 824 and Clostridium beijerinckii NCIMB 8052 were tested as promising C2~C4 compounds-producing microorgani

Ⅳ. Results
□ Production of C2~C4 bio-chemicals (yield > 0.35 g/g sugar)
- Among Clostridium strains which produce C2~C4 compounds (acetone-butanolethanol), Clostridium acetobutylicum ATCC 824 and Clostridium beijerinckii NCIMB 8052 were tested as promising C2~C4 compounds-producing microorganisms. When acetate was added as a co-substrate, the yields of C2~C4 compounds increased to 0.33 g/g and 0.38 g/g for Clostridium acetobutylicum ATCC 824 and Clostridium beijerinckii NCIMB 8052, respectively.

□ Conversion of acetone-butanol-ethanol mixture to biogasoline
- Pd/C-CaO-catalyzed solvent-free α-alkylation of an acetone-butanol-ethanol (ABE) was conducted. Under optimized reaction conditions of 180℃ for 20 h, a yield of 78.1% of total alkylates was produced with mainly C₇–C₁₁ ketones and their alcohol forms. After alkylation, a consecutive hydrodeoxygenation was also investigated to obtain a 76% yield of C₇ –C₁₁ n-alkanes. Characterization of the used catalysts showed that Pd/C slightly agglomerated after the alkylation but still retained its catalytic activity in the subsequent use cycle, whereas CaO was converted to CaCO₃ by the presence of CO₂ formed from the decomposition of aldol intermediates. To reactivate the used catalysts, heat-treatment at 500℃ for 3 h under H₂ gas could reform CaO and recover 90% catalytic activity. This reactivation method could retain over 80% activity of the catalyst after five continuous cycles. However, a reactivated catalyst treated with heat and H₂ was much less effective in the second cycle of one-pot alkylation and hydrodeoxygenation.

□ Development of C10 bio-hydrocarbon biosynthesis
- The ultimate goal of this study is to produce biocatalyst precursors of high purity and high calorific value of C10 biohydrocarbons such as bio aerosol from fermentation sugars derived from woody biomass. It is a candidate fuel material suitable for 'Drop-in-fuel' concept as an innovative way to increase the low calorific value of existing biofuel materials. Therefore, it was possible to produce the world's first C10 bio-carbonated ointment seeds through genetic engineering technology.

□ Development of cataysis processes to obtain high carbon-number hydrocarbon fuels from hemicellulose-derived sugars
- High carbon-number hydrocarbon fuels are produced using condensation of furans and hydrodeoxygenation of condensates yielding 88.1%.
- Amberlyst-15 was used as a solid acid catalyst and various hydrogenation catalysts were screened for the hydrodeoxygenation of condensates. Ru/Alumina and Ru/TiO₂ exhibited the best activity. During the condensation, the addition of water to reaction mixture preferentially produced trimers to tetramers.

□ Production of BTX aromatic hydrocarbons from C5/C6 sugar-derived furans via Diels-Alder and dehydration reactions (>67% yield)
- Selective conversion of C6 sugar-derived 2,5-dimethylfuran into p -xylene (~82% yield) via Diels- Alder cycloaddition and dehydration reactions was achieved using silica-supported HSiW catalyst.
- C5-derived 2-methylfuran was also converted selectively into toluene via a similar pathway to p -xylene production over Lewis acid catalysts of AlCl₃ and Na-Y in a ~70% yield.
- Throughout this study, the role of acid sites and structure-activity correlations of a range of solid acid catalysts in the furan-to-BTX conversion reactions were elucidated and the causes of catalyst deactivation were investigated.

□ Production of high-yield and high-quality bio-oil from lignin via liquefaction process
- A novel strategy for the production of high-yield (>80%) and high-quality (low Mw value of 604 g/mol and low oxygen content of 13.0%) bio-oil from lignin was developed using a combined catalyst of Ru/C coordinated with MgO/ZrO₂ and supercritical ethanol (350ﾟC and 100bar) as a solvent.
-The synergic role of the metal (i.e., Ru) and basic (i.e., MgO) sites during lignin depolymerization was elucidated, and the effects of reaction conditions (e.g., the amounts of base loading, external hydrogen gas, the reaction time) were investigated to optimize the lignin depolymerization efficiency.
- When organosolv lignin was used as a reactant, a lower bio-oil yield (~59%) was obtaind compared to that of kraft lignin (~80%), but the quality of bio-oil was significantly improved, having a lower molecular weight (Mw ~ 545g/mol) and a higher aromatic monomer content (~13.6% yield).
(출처 : SUMMARY)

목차 Contents

• 표지 ... 1
• 제 출 문 ... 2
• 보고서 초록 ... 3
• 요 약 문 ... 4
• S U M M A R Y ... 8
• C O N T E N T S ... 12
• 목차 ... 13
• 제 1 장 연구개발과제의 개요 ... 14
• 제 1 절 연구개발의 배경 및 필요성 ... 14
• 제 2 절 연구개발 목적 및 기대효과 ... 16
• 제 2 장 국내외 기술개발 현황 ... 18
• 제 1 절 국외 기술개발 동향 ... 18
• 제 2 절 국내 기술개발 동향 ... 20
• 제 3 장 연구개발수행 내용 및 결과 ... 23
• 제 1 절 C5 이상 탄화수소 생산을 위한 C2-C4 바이오화합물 생산 ... 23
• 제 2 절 바이오 생성물 기반 고탄소 연료전구체 제조 기술 개발 ... 31
• 제 3 절 C10이상 고탄소 바이오탄화수소 전구체 생합성 연구 ... 51
• 제 4 절 헤미셀룰로오스 유래 퓨란계 화합물로부터 고탄소 디젤 생산 연구 ... 60
• 제 5 절 C5/C6 슈가 유도체 기반 방향족 탄화수소 제조 기술 ... 74
• 제 6 절 고수율의 리그닌 액화 공정 개발 및 바이오오일 품질 최적화 ... 104
• 제 4 장 목표달성도 및 관련분야에의 기여도 ... 118
• 제 1 절 연차별 연구개발 목표 및 달성도 ... 118
• 제 2 절 관련분야 기술 발전에의 기여도 ... 128
• 제 5 장 연구개발결과의 활용계획 ... 130
• 제 1 절 기술적 측면 ... 130
• 제 2 절 경제·산업적 측면 ... 131
• 제 6 장 참고문헌 ... 132
• 끝페이지 ... 135