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NTIS 바로가기전기화학회지 = Journal of the Korean Electrochemical Society, v.12 no.2, 2009년, pp.131 - 141
송지은 (서강대학교 화학과, 바이오융합기술 협동과정, BK 무기 및 생체재료사업팀) , 신운섭 (서강대학교 화학과, 바이오융합기술 협동과정, BK 무기 및 생체재료사업팀)
The conversion of carbon dioxide to value-added compounds has been attracted to solve the environmental problems due to the climate change caused by greenhouse effect in addition to recycle the abundant and renewable carbon source. For utilizing carbon dioxide to useful compounds, the development of...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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지구온난화는 어떤 문제를 일으키는가? | 인간의 산업 및 경제 활동에 의해 대기 중으로 대량으로 배출되는 이산화탄소는 기존의 탄소순환사이클에 추가하여 이산화탄소를 대기 중에 공급함으로 인해 온실효과를 증대시키게 되는데, 이는 지표나 하층 대기의 기온을 상승시켜 지구온난화 및 기후변화를 초래하고 있다. 지구온난화는 기후변동 및 해수면 상승으로 인한 해안저지대의 침수뿐만 아니라 생물종의 멸종 등 생태계 혼란, 사막화 심화, 가뭄·홍수·태풍 등 기상이변의 빈발을 초래한다. 현재 대기 중에 이산화탄소는 380 ppm 정도 존재하고 있는데, 이는 50년 전 270 ppm에 비해 약 40%가 증가한 것이다. | |
이산화탄소 환원에 의해 무엇이 생성될 수 있는가? | 전기에너지를 투입하여 이산화탄소를 전환시키는 것은 전기화학적으로 이산화탄소를 환원시키는 것이다. 이러한 환원반응에 의하여 CO, formate, formaldehyde, methanol, methane 등이 생성될 수 있는데, 각 생성물에 따른 이산화탄소 환원의 형식전위(formal potential, mV vs. NHE, pH = 7)는 다음과 같다. | |
현재 대기 중에 이산화탄소는 380 ppm 정도 존재하고 있는데, 50년 전 270 ppm에 비해 약 40%가 증가한 것임에 따라, 어떤 문제를 일으킬 것이라 우려되고 있는가? | 현재 대기 중에 이산화탄소는 380 ppm 정도 존재하고 있는데, 이는 50년 전 270 ppm에 비해 약 40%가 증가한 것이다. 이로 인해 지구 평균온도는 0.4~0.8o 상승되었고, 이와 같은 추세로 진전되면 30~40년 후에는 550 ppm에 이르러 대재앙이 생길 수도 있을 것으로 우려되고 있다.1) |
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