화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.31, No.1, 36-42, February, 2020
DOI10.14478/ace.2019.1101  Export Citation
산화 공정이 석유계 등방성 피치의 열거동 특성에 미치는 영향
Effects of Oxidation Process on Thermal Properties of Petroleum-based Isotropic Pitch
이남지1, 2, 서상완1, 3, 곽철환1, 4, 김민일1, 임지선1, 5, †
  • 1한국화학연구원(KRICT) 탄소산업선도연구단
  • 2한국기술교육대학교 에너지신소재화학공학부
  • 3충남대학교 응용화학공학과
  • 4인하대학교 생명공학과
  • 5과학기술연합대학원대학교 화학소재 및 공정
Namji Lee1, 2, Sang Wan Seo1, 3, Cheol Hwan Kwak1, 4, Min Il Kim1, and Ji Sun Im1, 5, †
  • 1Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
  • 2Department of Energy Materials Chemical Engineering, Korea University of Technology and Education (KOREATECH), Cheonan, Chungnam 31253, Republic of Korea
  • 3Department of Applied Chemical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
  • 4Department of Biological Engineering, Inha University, Incheon 22212, Republic of Korea
  • 5Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
E-mail:
초록
산화 공정이 피치의 열거동 특성에 미치는 영향을 규명하기 위하여 다양한 공정 온도에서 산화된 피치를 제조하였다. 피치의 열거동 특성은 thermogravimetric analysis (TGA)를 이용하여 분석하였으며, derivative thermogravimetry (DTG) 그래프 거동 변화에 따라 A (25~100 ℃), B (250~550 ℃), C (550~800 ℃) 세 구간으로 분석하였다. A 구간에서는 피치에 함유되어 있던 수분이 제거되면서 중량 감소가 발생하였다. B 구간에서 산화에 의하여 피치의 열적 안정성이 향상되었다. 이는 산화 온도가 증가할수록 피치의 방향족화도 및 분자량이 증가하였기 때문으로 판단된다. 반면, C 구간에서는 B 구간과 반대의 결과를 보였다. C 구간에서 열적 안정성이 저해된 것은 산화 공정에 의하여 피치에 도입 된 C-OH, C-O-C, C=O 결합이 분해되고, 이에 의하여 발생한 산소 화합물이 피치의 연소 반응을 유도하였기 때문으로 사료된다.
In order to investigate the effect of the oxidation process on thermal properties of the pitch, the oxidized pitch was prepared by changing the oxidation temperature. Thermal properties of the pitch were analyzed using thermogravimetric analysis (TGA), and it divided into three sections as A (25~100 ℃), B (250~550 ℃) and C (550~800 ℃) by derivative thermogravimetry (DTG) graph behavior. In the A section, the was reduced because the moisture contained in the pitch was removed. In the B section, as the oxidation temperature increased, the thermal stability of the pitch is improved. Because the degree of aromaticity and molecular weight of the pitch increased with increasing oxidation temperature. In contrast, the results of the C section were shown opposite of B section. Because the introduced C-OH, C-O-C, and C=O bonds were decomposed, and the resulting oxygen compounds induced the combustion reaction of the pitch.
Keywords:Pitch;Oxidation;Oxygen functional group;Dehydrogenation;Thermogravimetric analysis
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