• Title/Summary/Keyword: Hydrocarbon Compound

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토양내 탄화수소계 화합물의 농도측정 기법에 대한 TDR(Time Domain Reflectometry)적용 가능성 연구

  • 박민수;김동주
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • 1998.11a
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    • pp.201-205
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    • 1998
  • Leakage of hydrocarbon compound from underground storage tank has been a significant issue to the hazard of environmental contaminants. It is therefore necessary to develop the measurement technique of hydrocarbon compound concentration. In this study, the possibility of TDR application to measure concentration of hydrocarbon compound, especially diesel, in a sandy soil was investigated. Experiments were conducted in two different conditions. The first one was to measure the resistances of the soil columns packed according to the various ratios of tab water and diesel content in the total voids. The other was to measure the resistance of the soil under the flow condition where diesel oil was allowed to infiltrate into the KCl-saturated soil column. The experimental results showed that there exists a significant relationship between oil% and TDR-measured resistance. This suggests that TDR can be an effective device to measure the concentration of hydrocarbon compound in a soil.

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CARBON ISOTOPE ANALYSES OF INDIVIDUAL HYDROCARBON MOLECULES IN BITUMINOUS COAL, OIL SHALE, AND MURCHISON METEORITE

  • Kim, Kyoung-Sook;Yang, Jong-Mann
    • Journal of Astronomy and Space Sciences
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    • v.15 no.1
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    • pp.163-174
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    • 1998
  • To study the origin of organic matter in meteorite, terrestrial rocks which contain or-ganic compounds similar to the ones found in carbonaceous chondrites are studied and compared with Muchison meteorite. Hydrocarbon molecules were extracted by benzene and methanol from bituminous coal and oil shale and the extracts were partitioned into aliphatic, aromatic, and polar fractions by silica gel column chromatography. Carbon isotopic ratios in each fractions were analysed by GC-C-IRMS. Molec-ular compound identifications were carried by GC-MS Engine. Bituminous coal and oil shale show the organic compound composition similar to that of meteorite. Oil shale has a wide range of ${\delta}^{13}C,-20.1%_0~-54.4%_0$ compared to bituminous coal, $-25.2%_0~34.3%_0$. Delta values of several molecular compounds in two terrestrial samples are different. They show several distinct distributions in isotopic ratios compared to those of meteorite; Murchison meteorite has a range of ${\delta}^13C\;from\;-13%_0\;to\;+30%_0$. These results provide interpretation for the source and the formation condition of each rock, in particular alteration and migration processes of organic matter. Especially, they show an important clue whether some hydrocarbon molecules observed in meteorite are indigenous or not.

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Formation Characteristics of PM and SOF by Spray Combustion of Marine Heavy Fuel Oil

  • Kim, Houng-Soo;Murakami, T.;Nishida, Osami;Fujita, H.;Harano, W.
    • Journal of Advanced Marine Engineering and Technology
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    • v.28 no.2
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    • pp.292-299
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    • 2004
  • This study is intended to check a temperature of the flame to raise by burning A heavy oil in a boiler. to measure the concentration of DS and SOF after collecting the PM(Particulate Matters). and to analyze the components ingredients of SOF by G.C Mass for presupposing the generation of particulate matters(soot). It is thought that the methyl(CH3) of the cyclic compound is changed to the materials of 2 cycles and 3 cycles after becoming CH by dehydrogenation and also mixing with the CH of a chain compound. form H-$\cdot$C=C$\cdot$-H that is mentioned before. in order to become Polycyclic Aromatic Hydrocarbon.

Effective Separation Method of NBD Dimer Mixture (NBD 이량체 생성물의 효율적 분리방법)

  • Jeong, Byung-Hun;Han, Jeong-Sik;Min, Seong-Ki;Lim, Jin-Shik
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2010.11a
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    • pp.797-799
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    • 2010
  • In preparation of NBD dimer, one of the industrially useful multicyclic hydrocarbon compound, various catalyst, solvent and byproducts were included in reaction product at the end of dimerization reaction. In order to increase the yield of NBD dimer mixture, first of all, effective separation process development was required. The research for improvement of NBD dimer yield were performed by use of eco-friendly and recyclable separation solvent.

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INFLUENCE AND BlOCONCENTRATlON OF PETROLEUM HYDROCARBON ASSOCIATED WITH OIL ON AND BY PLANKTON IN A MESOCOSM EXPERIMENT OF EAST CHINA SEA

  • Shi, Xiaoyong;Wang, Xiulin;Jiang, Yu;Han, Xiurong
    • Proceedings of the Korean Environmental Health Society Conference
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    • 2001.11a
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    • pp.42-48
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    • 2001
  • A kinetic model was presented to estimate the uptake/release rate constants and thereafter, bioconcentration factor, $k_1$, $k_2$ and BCF (bioconcentration factor), for the uptake of PH by plankton were obtained. Implies that PH(petroleum hydrocarbon) caused no significant influence on the uptake of $N-NO_3$, but significant influence on that of $P-PO_4$. In addition, the application of kinetic model for the bioconcentration of volatile organic toxic compound by organism suggests that the uptake of PH by plankton was an important process for the environmental capacity of PH.

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Differential Rapid Screening of Phytochemicals by Leaf Spray Mass Spectrometry

  • Muller, Thomas;Cooks, R. Graham
    • Bulletin of the Korean Chemical Society
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    • v.35 no.3
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    • pp.919-924
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    • 2014
  • Ambient ionization can be achieved by generating an electrospray directly from plant tissue ("leaf spray"). The resulting mass spectra are characteristic of ionizable phytochemicals in the plant material. By subtracting the leaf spray spectra recorded from the petals of two hibiscus species H. moscheutos and H. syriacus one gains rapid access to the metabolites that differ most in the two petals. One such compound was identified as the sambubioside of quercitin (or delphinidin) while others are known flavones. Major interest centered on a $C_{19}H_{29}NO_5$ compound that occurs only in the large H. moscheutos bloom. Attempts were made to characterize this compound by mass spectrometry alone as a test of such an approach. This showed that the compound is an alkaloid, assigned to the polyhydroxylated pyrrolidine class, and bound via a $C_3$ hydrocarbon unit to a monoterpene.

The Relative Importance of Indoor and Outdoor Sources for Determining Indoor Pollution Concentrations in Homes in Seoul, South Korea

  • Lee, Jae Young;Kim, Kyunghwan;Ryu, Sung Hee;Kim, Chang Hyeok;Bae, Gwi-Nam
    • Asian Journal of Atmospheric Environment
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    • v.12 no.2
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    • pp.127-138
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    • 2018
  • This study measured indoor and outdoor levels of hydrocarbon volatile organic compounds (VOCs), such as benzene, toluene, ethylbenzene, and xylene isomers (collectively referred to as BTEX), as well as 13 carbonyl compounds, at 20 homes in Seoul, South Korea. Along with the sampling of BTEX and carbonyls, indoor concentrations of the air pollutants nitrogen oxide (NO) and carbon dioxide ($CO_2$) were also measured at each home. These measurements were used to understand the characteristics of BTEX and carbonyls by calculating the various ratios and correlation coefficients between measured contaminant levels. We found that carbonyls were mostly originated from indoor sources, while BTEX were originated from both indoor and outdoor sources. A high correlation between indoor levels of NO and BTEX indicated that traffic emissions were also an important sources of BTEX.

Synthesis of Aromatic and Aliphatic Compound from Kraft Oak Lignin and Acetosolve Straw Lignin by Thermochemical Liquefaction (참나무 크라프트 리그닌과 볏짚 아세토솔브 리그닌의 열-화학적 분해에 의한 방향족(Aromatic)과 지방족(Aliphatic)화합물의 합성)

  • Lee, Byung-G.
    • Journal of the Korean Wood Science and Technology
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    • v.25 no.1
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    • pp.1-7
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    • 1997
  • Kraft oak lignin and ricestraw lignin from acetosolve pulping were dissolved in 50/50 mixture of tetralin/m-cresol solvent. The dissolved lignin was reacted in the pressurized autoclave which was operating at $350{\sim}500^{\circ}C$ of reaction temperature and 10~20 atms of reaction pressure respectively_Hydrogen pressure of 60~80kg/$cm^2$ was exercising into the pressurized autoclave reactor to create thermochemical hydrogenolysis reaction. It was identified by GLC, GC-MS and HPLC that the alkyl-aryl-${\beta}$-O-4 ether bond of lignin was cleaved and degraded into various smaller molecules of aromatic compound such as phenols and cresols under the reaction conditions around $300^{\circ}C$ and 10 atms of reaction temoerature and pressure. Hydrogenolysis reaction of lignin compound which was done above $500^{\circ}C$ of reaction temperature and 20 atms of reaction pressure showed that the amount of aromatic compound such as phenols and cresols degraded from reactant lignin was decreasing with newly present and increasing water out of product mixtures. It was supposed that new aliphatic compound of high molecular weight hydrocarbon is composed due to higher reaction temperature and pressure of hydrogenolysis reaction such as $500^{\circ}C$ and 20 atms, even though it was almost impossible, to identify what kind of degraded products it was by HPLC.

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Studies on the Development of Anticarcinomatous Resources -Chemical constituents of the root of Aster divaricatus L. (II)- (항암성자원생약개발(抗癌性資源生藥開發)에 관(關)한 연구(硏究) -미국산 개미취근(根)의 성분연구(成分硏究)(II)-)

  • Chung, Dong-Kyu
    • Korean Journal of Pharmacognosy
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    • v.9 no.2
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    • pp.73-75
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    • 1978
  • We had previously reported that five compounds were obtained from fraction A of Aster divaricatus by using column chromatography and presumed them to be alkanes $CH_3\;(CH_2)n\;CH_3.$ In this investigation, compound (II) out of above five compounds was identified as hydrocarbon $C_{16}H_{34},$ m.w. 258 belonging to alkane, by using nmr spectra, mass spectra and the elementary analysis. It was also found that compound (IV) is the same compound as the campound (II).

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The Variation of Offset Ink Properties according to the Vegetable Oil Estersr (Vegetable Oil Esters에 따른 Offset 잉크의 물성 변화에 관한 연구)

  • Park, Jung-Min;Kim, Sung-Bin
    • Journal of the Korean Graphic Arts Communication Society
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    • v.30 no.1
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    • pp.1-19
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    • 2012
  • According as gradually increasing the demand for eco-friendly at the printing process, it has been progressed fairly development. Especially, the inks are used by soy oil beginning of ink industry for preventing environment, it is possible to make eco-friendly inks with vegetable ester. So it is not necessary to use petroleum-based solvents at all for preventing environment. These eco-friendly inks have a benefits they are able to use the renewable resource. But basically vegetable oils have that reduce the VOC(Volatile Organic Compound) and high viscosity, high solubility properties. So if the vegetable oils use in the ink, set off problem occur on the paper because of slow drying time. In case of vegetable ester, it has similar the molecular weight and kinetic viscosity with hydrocarbon solvent, it is able to control the power of dilution about the resin. So, it has benefit that solve the problem of the existing eco-friendly inks. In this study, different types of ester were made by six types of vegetable oils and used ester in the varnishes and inks properties are comparison with hydrocarbon solvent based ink. By considering the intrinsic properties of vegetable oil, ester used to analyze the changes in ink properties, using ester varnish is applied to study the rheology characteristics and emulsification with inks.