• Title/Summary/Keyword: 열분해/GC/MS

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Recovery of BTEX-aromatics from Post-consumer Polypropylene Fraction by Pyrolysis Using a Fluidized Bed (유동층(流動層) 급속열분해(急速熱分解)에 의한 폐(廢) Polypropylene fraction으로부터 BTEX-aromatics의 회수(回收))

  • Cho, Min-Hwan;Jeong, Soo-Hwa;Kim, Joo-Sik
    • Resources Recycling
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    • v.17 no.6
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    • pp.50-56
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    • 2008
  • A polypropylene fraction collected from the stream of post-consumer plastics was pyrolyzed. The aim of this study is to observe the dependence of yield of BTEX-aromatics normally used as solvent on the reaction temperature. To reach the goal, three experiments were carried out at different temperature between 650 and $700^{\circ}C$, using a fluidized bed reactor that shows an excellent heat transfer. In the experiments, product gases were used as a fluidizing medium to maximize the amount of BTEX-aromatics at fixed flow rate and feed rate during the pyrolysis. Oil, gas and char were obtained as product fractions. Product gases were analyzed with GCs(TCD, FID) and with a GC-MS system for qualitative analysis. For an accurate analysis of product oil, the product oil was distilled under vacuum, and separated the distillation residues from oil fractions that were actually analyzed with a GC-MS system. As the reaction temperature went higher, the content of BTEX-aromatics increased. The maximal yield of BTEX-aromatics was obtained at $695^{\circ}C$ with a value of about 30%. The main compounds of product gas were $CH_4$, $C_2H_4$, $C_2H_6$, $C_3H_6$, $C_4H_{10}$ and the product gas had an higher heating value about 45MJ/kg. It could be used as a heat source for a pyrolysis plant or for other fuel applications.

Thermal Decomposition of PVB(polyvinyl butyral) and Ni Green Sheet (PVB와 니켈 그린 시트의 열분해)

  • Seo, Jung Ju;Kuk, Seung Taek;Kim, Keon
    • Journal of the Korean Chemical Society
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    • v.40 no.3
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    • pp.180-186
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    • 1996
  • To determine burn-out condition of polyvinyl butyral as binder, TGA and GC/MS were used to analyze decomposed products of PVB and Ni green sheet during binder pyrolysis. The produced gases are similar in kind each other but the relative amount of produced gases was different. When the atmosphere air contains water, relatively larger amount of carboxylic acids and aromatic compounds were detected, and the amount of the decomposed products were larger in Ni green sheet than PVB alone. And Ni acted as a catalyst in the thermal decomposition of PVB.

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Energy Recovery via Pyrolysis of Waste Tire Rubber : Desulfurization Effect of Pyrolysis Oil by Adding Waste Polypropylene (폐타이어의 열분해를 통한 에너지화 : 폐폴리프로필렌 첨가 시 열분해 오일의 탈황 효과)

  • Jeong, Jaeyong;Lee, Uendo;Chang, Wonseok;Oh, Munsei;Jeong, Soohwa
    • Journal of Energy Engineering
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    • v.26 no.3
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    • pp.97-104
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    • 2017
  • In this study, waste tire rubbers were pyrolyzed in a lab-scale pyrolysis plant equipped with a fluidized bed reactor in a temperature ranges of $450-650^{\circ}C$. The main object of this work is to investigate the properties of pyrolysis oil with reaction temperatures and the behavior of sulfur in the products when waste polypropylene was added for co-pyrolysis. The maximum yield of oil was about 52wt.% at the reaction temperature of $456^{\circ}C$. From GC-MS analysis, the pyrolysis oils consisted mainly of limonene, toluene, xylene, styrene, trimethylbenzene, methylnaphthalenes and some heteroatom(sulfur and nitrogen)-containing compounds. The addition of waste polypropylene resulted in decrease in sulfur contents of the pyrolysis oils.

Influence of Reaction Temperature on Bio-oil Production from Rice Straw by the Pyrolysis (볏짚으로부터 바이오오일 생산에 대한 열분해 반응온도의 영향)

  • Kang Bo-Sung;Park Young-Kwon;Kim Joo-Sik
    • Resources Recycling
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    • v.15 no.1 s.69
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    • pp.12-19
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    • 2006
  • Rice straw is one or the main renewable energy sources in Korea. Bio-oil is produced from rice straw with a lab-scale equipment mainly with a fluidized bed and a char removal system. It was investigated how the reaction temperature affected the production of bio-oil and the efficiency of a char removal system. To elucidate how the temperature depended on the production of bio-oil, experiments were conducted at $466^{\circ}C,\;504^{\circ}C\;and\;579^{\circ}C$, respectively. The mass balance was established in each experiment, and the produced gas and oil were analyzed with the aid of GCs and a GC-MS system. The char removal system is composed of a cyclone and a hot filter. Tn the experiments, we observed that the production of bio-oil was decreased with temperature, and the bio-oil contained very useful chemicals.

Analysis of Binding Media in Dancheong Sample from Unhangak Hall of Hwaryeongjeon Shrine, Suwon (수원 화령전 운한각 단청시편의 교착제 분석)

  • Park, Jongseo;Lee, Sun Myung;Mun, Seong Woo;Kang, Yeong Seok
    • Journal of Conservation Science
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    • v.37 no.3
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    • pp.245-254
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    • 2021
  • In this study, organic materials in Dancheong specimens were analyzed to establish a Dancheong preparation method in Unhangak Hall of Hwaryeongjeon Shrine, Suwon. IR and pyrolysis/GC/MS were applied to a Zuhong specimen and a gilded one. The IR spectra showed absorption peaks corresponding to C-O, C=O, OH, although they were different from those of animal glue, Asian lacquer, and drying oil. The Pyrolysis/GC/MS after the on-line methylation revealed Asian lacquer-derived components, such as methyl 7-(2,3-dimethoxyphenyl)heptanoate, and drying oil-derived components, such as nonanedioic acid, dimethyl ester. Based on these results, we estimated that Asian lacquer and drying oil were used in the Dancheong preparation. Small amounts of 3-methyl-1H-pyrrole were also detected, which could possibly originate from animal glue. The radiocarbon age of the specimens appeared to be between the late 17th to the early 20th century. This study potentially reports the first case of Asian lacquer detection in a Dancheong specimen in Korea.

Influence of Reaction Temperature on the Pyrolytic Product of Rice Straw by Fast Pyrolysis using a Fluidized Bed (볏짚의 급속 열분해 생성물에 대한 반응온도의 영향)

  • Kang, Bo-Sung;Park, Young-Kwon;Kim, Joo-Sik
    • Proceedings of the Korean Institute of Resources Recycling Conference
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    • 2005.10a
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    • pp.47-58
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    • 2005
  • Rice straw is one of the main renewable energy sources in Korea, and bio-oil is produced from rice straw with a lab. scale plant equipped mainly with a fluidized bed and a char removal system. We investigated how the reaction temperature affected the production of bio-oil and the efficiency of a char removal system. To elucidate how the temperature depended on the production of bio-oil, experiment were conducted between $450^{\circ}C\;and\;600^{\circ}C$ with a feed rate of about 300g/h. The mass balance was established in each experiment, and the produced gas and oil were analyzed with the aid of GCs and a GC-MS system. The char removal system is composed of a cyclone and a hot filter. In the experiments, we observed that the optimum reaction temperature range for the production of bio-oil is between $450^{\circ}C\;and\;500^{\circ}C$.

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Thermal Degradation of High Molecular Components Obtained from Pyrolysis of Mixed Waste Plastics (혼합폐플라스틱의 열분해로부터 생성된 고분자성분의 열적분해)

  • Oh, Sea Cheon;Ryu, Jae Hun;Kwak, Hyun;Bae, Seong-Youl;Lee, Kyong-Hwan
    • Applied Chemistry for Engineering
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    • v.19 no.2
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    • pp.191-198
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    • 2008
  • The thermal degradation characteristics of high molecular components obtained from pyrolysis of mixed waste plastics have been studied by thermogravimetric analysis (TGA) and gas chromatography spectrometry (GC-MS). The kinetics of thermal degradation has been studied by a conventional nonisothermal thermogravimetric technique at several heating rates between 10 and $50^{\circ}C/min$. The dynamic thermogravimetric analysis curve and its derivative have been analyzed using a variety of analytical methods reported in the literature to obtain information on the kinetic parameters such as activation energies and reaction orders. The yields of liquid products have been monitored by batch pyrolysis reactor under various reaction temperatures and reaction times. And the characteristic of liquid products with the increase in reaction temperature has been performed by GC-MS.

Liquefaction Characteristics of Polypropylene-Polystyrene Mixture by Pyrolysis at Low Temperature (Polypropylene-Polystyrene 혼합물의 저온 열분해에 의한 액화특성)

  • Cho, Sung-Hyun;Kim, Chi-Hoi;Kim, Su-Ho;Lee, Bong-Hee
    • Clean Technology
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    • v.16 no.1
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    • pp.26-32
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    • 2010
  • The low temperature pyrolysis of polypropylene (PP), polystyrene (PS) and polypropylene-polystyrene (PP-PS) mixture in a batch reactor at the atmospheric pressure and $450^{\circ}C$ was conducted to investigate the synergy effect of PP-PS mixture on the yield of pyrolytic oil. The pyrolysis time was varied from 20 to 80 mins. The products formed during pyrolysis were classified into gas, gasoline, kerosene, gas oil and heavy oil according to the petroleum product quality standard of Ministry of Knowledge Economy. The analysis of the product oils by GC/MS(Gas chromatography/Mass spectrometry) showed that new components were not detected by mixing of PP and PS. There was no synergy effect according to the mixing of PP and PS. Conversions and yields of PP-PS mixtures were linearly dependent on the mixing ratio of samples except for heavy oil yields. Heavy oil yields showed almost constant regardless of the mixing ratio.

STUDY OF VOLATILE COMPONENTS IN THE PYROLYZATES OF COCOA POWDER TOBACCO PRODUCTS FLAVORANT (담배향료로 쓰이는 코코아분말의 열분해 생성물에 관한 연구)

  • Park, Joon Y.;Kim, Ok C.;Na, Do Y.;Chang, Hee J.;Kim, Yong T.
    • Journal of the Korean Society of Tobacco Science
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    • v.12 no.2
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    • pp.67-75
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    • 1990
  • The pyrolytlc behavior of cocoa powder, a flavorant of tobacco smoking products, was examined by determining its pyrolyzate constituents. Cocoa powder was pyrolyzed of two cigarette smoking conditions'distillation-pyrolysis zone(35$0^{\circ}C$, 55$0^{\circ}C$) and high temperature zone($650^{\circ}C$, 85$0^{\circ}C$). Pyrolyzate was flushed from the tube by NB gas into CS2 trap in dry ice-acetone cooled bath and charcoal tube and its constituents were analyzed by GC/MS. As results, the major components of pyrolyzates were identified as hydrocarbon and phenolic compounds. In addition to these, aldehyde, ketone, pyrazin in very small amount. Component changes were observed with temperature increase; decane, styrene, tridecane, m-cresol,4-ethylphenol were increased while hexadecane, tetradecane were decreased. o-cresol and 2-ethylphenol were constant in amounts despite temperature change.

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Liquefaction Characteristics of Polyethylene-Polypropylene Mixture by Pyrolysis at Low Temperature (Polyethylene-Polypropylene 혼합물의 저온 열분해에 의한 액화특성)

  • Cho, Sung-Hyun;Choi, Hong-Jun;Na, Byung-Ki;Lee, Bong-Hee
    • Clean Technology
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    • v.15 no.2
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    • pp.109-115
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    • 2009
  • The low temperature pyrolysis of polyethylene (PE), polypropylene (PP) and polyethylene-polypropylene (PE-PP) mixture in a batch reactor at the atmospheric pressure and $450^{\circ}C$ was carried out to investigate the synergy effect of PE-PP mixture. The pyrolysis time was from 20 to 80 mins. The products formed during pyrolysis were classified into gas, gasoline, kerosene, gas oil and heavy oil according to the petroleum product quality standard of Korea Institute of Petroleum Quality. The analysis of the product oils by GC/MS showed that no new component was detected and no synergy effect was made by mixing of PE and PP. Conversions and yields of PE-PP mixtures were linearly dependent on the mixing ratio of samples.