• Title/Summary/Keyword: butane

Search Result 329, Processing Time 0.025 seconds

The Effects of Using Common Oversized Cookware for Portable Butane Gas Range (상용 과대 불판 사용이 이동식 부탄 연소기에 미치는 영향)

  • Kim, Sooik;Keum, Kuk Bin;Yu, Byeonghun;Lee, Seungro;Kim, Young-gu;Lee, Chang Eon
    • 한국연소학회:학술대회논문집
    • /
    • 2014.11a
    • /
    • pp.107-109
    • /
    • 2014
  • Through the economic development, people enjoying the camping and demand of camping goods are increasing since they have free time. So they use portable butane gas range outdoor. In addition to that, many restaurants that offer hotpot or meat in Korea use portable butane gas ranges for their convenience. But 19% of gas accidents are using portable butane gas range, 13.7% of them are using oversized cookware. Despite the high accident rate, there is no safety standards about portable butane gas range using oversized cookware. Therefore we conducted to measure temperature and pressure of portable butane gas ranges for reforming safety standards. As a result. we confirmed relation between bottom temperature of the portable butane gas barrel and pressure of the butane gas. Also we confirmed that portable butane gas ranges operate safely when bottom temperature of the portable butane gas barrel is bellow $50^{\circ}C$.

  • PDF

Biodegradation Study of Gasoline Oxygenates by Butane-Utilizing Microorganisms (부탄 분해 미생물을 이용한 휘발유 첨가제의 분해특성)

  • 장순웅
    • Journal of Soil and Groundwater Environment
    • /
    • v.8 no.1
    • /
    • pp.27-34
    • /
    • 2003
  • In this study, potential degradation of MTBE and other gasoline oxygenates by pure culture ENV425 and mixed culture isolated from gasoline contaminated soil using butane as the sources of carbon and energy was examined and compared. Butane monooxygenases(BMO) of butane-grown ENV425 and mixed culture generated 1-butanol as a major metabolite of butane oxidation and addition of acetylene, specific inhibitor of monooxygenase, inhibited both butane oxidation and 1-butanol production. The results described in this study suggest that alkanes including propane, pentane, and butane are effectively utilized as a growth substrate to oxidize MTBE cometabolically. And also BTEX compounds could be the potential substrate of the MTBE cometabolism. Cell density also affected on the MTBE degradation and transformation capacity(Tc). Increasing cell density caused increasing MTBE degradation but decreased transformation capacity. Other result demonstrated that MTBE and other gasoline oxygenates, ETBE and TAME, were degraded by butane-grown microorganism.

Experimental Study on the Safety of Portable Butane Gas Range (휴대용 부탄 가스 레인지의 안전성에 관한 실험적 연구)

  • Keum, Kuk Bin;Kim, Do-Hyun;Kum, Sungmin;Lee, Chang-Eon;Kim, Young-gu
    • Journal of the Korean Society of Combustion
    • /
    • v.22 no.2
    • /
    • pp.50-56
    • /
    • 2017
  • This study was conducted an experiment for the thermal flow mechanism of the surrounding butane gas can and pressure change in butane can with oversized cookware. And numerical analysis was performed to analyze the process of heat transfer around butane can. Effect of radiant heat from small size cookware is very small. Thus small size cookware does not have a significant impact on the butane gas range safety. But radiant heat of oversized cookware is larger than small size cookware. Therefore it gives an adverse effect on the butane can. And when internal pressure of butane can is greater than about 406.8~447.2 kPa, a safety device of portable butane gas range were working. The causes of safety device working is because of trivet height. Trivet height is lowered, the radiant heat is increased. This radiant heat is to raise pressure of inside butane can. Experimental and numerical analysis results, the lower thermal conductivity of the cookware is greater the effects of radiant heat.

Activation and n-butane adsorption characteristics of palm char (야자각탄의 활성화와 n-butane 흡착특성)

  • 김인기;오한준
    • Journal of the Korean Crystal Growth and Crystal Technology
    • /
    • v.7 no.1
    • /
    • pp.174-184
    • /
    • 1997
  • Activated carbons were prepared from palm chars by steam activation. The effect of the activation temperature and time, steam concentration and flux on the n -butane adsorption properties were investigated on the basis of surface area, pore analysis and n-butane adsorption. The amount of n -butane adsorption increased with steam concentration and steam flux at higher activation temperature to the $900^{\circ}C$, however this tendancy on the activated carbons were not observed at the temperature above $900^{\circ}C$, It was shown that surface area was 978 $\textrm{m}^2$/g, average pore size was 9.3 $\AA$ and n-butane adsorption was 5.9 g /100ml in the activated carbons, prepared at $900^{\circ}C$, 185 minutes.

  • PDF

An Investigation on the Effect of Fuel Stratification of DME/n-Butane mixture on Reduction of Pressure Rise-Rate in HCCI Combustion (DME/n-Butane 혼합 연료의 농도 성층화에 의한 HCCI엔진연소의 압력 상승률 저감에 관한 연구)

  • Lim, Ock-Taeck;Park, Kyu-Yeol
    • Journal of the Korean Institute of Gas
    • /
    • v.15 no.3
    • /
    • pp.39-46
    • /
    • 2011
  • This study investigates the effects of the DME and n-Butane mixture and of the stratification on combustion characteristics of HCCI engine by chemical reaction calculation. First, the existing DME reaction scheme and n-Butane is combined to make new chemical reaction model, then validating the effectiveness of new scheme. Furthermore, this study verify the HCCI combustion characteristics according to the changes of DME and n-Butane mixture ratio, which shows different auto ignition characteristics. Finally, it confirms the effects of stratification of mixture fuel on the reduction of pressure rise rate.

Fundamental Study for Reformation of Safety Standard about Portable Butane Gas Range (이동식 부탄 연소기의 안전기준 개정을 위한 기초 연구)

  • Kim, Sooik;Keum, Kuk Bin;Yu, Byeonghun;Lee, Chang-Eon;Kim, Young-Gu
    • Journal of the Korean Society of Combustion
    • /
    • v.19 no.4
    • /
    • pp.35-41
    • /
    • 2014
  • The experiment was conducted to measure temperature and pressure around operating portable butane gas ranges with oversized cookwares. In this experiment, portable butane gas range with different safety equipment and two kinds of oversized cookware, each of which is made of aluminum alloy and rock, was used. As a result, temperature of the bottom of the butane and the pressure of butane barrel tend to aligned with each other. Through this result, it is reasonable that a safety criteria can be decided based on the temperature of the bottom of butane. Especially, portable butane gas ranges are safely conducted under the condition of the temperature is under 50 degree and pressure is under 500 kPa, respectively, at the bottom of the butane barrel.

Catalysis of carbon black for hydrogen production by butane decomposition reaction (부탄의 직접분해로부터 수소 생산을 위한 카본블랙의 촉매적 작용)

  • Yoon, Suk-Hoon;Han, Gi-Bo;Park, No-Kuk;Ryu, Si-Ok;Yoon, Ki-June;Han, Gui-Young;Lee, Tae-Jin
    • New & Renewable Energy
    • /
    • v.2 no.4 s.8
    • /
    • pp.70-77
    • /
    • 2006
  • The butane decomposition over the catalyst is an attractive method for the hydrogen production. The objective of the work was investigated the catalysis of carbon black in butane decomposition reaction. The Butane decomposition was performed over carbon black catalyst in a range of $500-1100^{\circ}C$. The butane conversion of thermal decomposition and catalytic decomposition were increased with increasing the reaction temperature The butane conversion of the thermal decomposition was higher than the butane conversion of the catalytic decomposition. Hydrogen and methane were mostly observed in the butane decomposition over $1000^{\circ}C$. Especially, the hydrogen yield was steadily increased with raising the reaction temperature, It could be known that the hydrogen yield of the catalytic decomposition was higher than one of the thermal cracking because the hydrogen productivity was improved by the catalyst. The deactivation of the catalyst was not observed in the reactivity test. The surface and crystalline of the fresh and used catalysts were characterized by TEM, BET surface area and XRD analysis, respectively. The fresh carbon black particles had mostly smoothly round-shaped surfaces. In the surface of the carbon black after the reaction, the deposited carbon was formed as the protrusion-shaped carbon and the cone-shaped. The proper peaks of carbon black appeared in XRD analysis.

  • PDF

Reactions of n-Butane and 1-Butene on Transition-Metal-Zeolite Y Catalysts (전이금속-Zeolite Y 촉매에서의 n-Butane 및 1-Butene의 반응)

  • Chon Hakze;Park Sang Eon
    • Journal of the Korean Chemical Society
    • /
    • v.21 no.6
    • /
    • pp.422-426
    • /
    • 1977
  • Transition-metal-loaded zeolite Y catalysts were prepared from LaY by exchanging with cobalt, nickel and palladium ions, followed by reduction in a hydrogen stream. The reactions of 1-butene and n-butane were studied on Co-, Ni-and Pd-loaded Y as well as La-exchanged Y using micro-catalytic pulse technique. For 1-butene reaction Ni-, Co-, Pd-loaded Y and La-exchanged Y all showed high activity suggesting that the acidic component, not the metallic component, was primarily responsible for the activity. For n-butane reaction on La-exchanged Y, the addition of 1-butene enhanced the activity. Significant cracking conversion of n-butane was observed for Ni-and Pd-loaded Y. Activity was higher on samples reduced at higher temperature and of higher metal content. It seems that the dehydrogenation to butenes at metallic sites is the primary step in the n-butane cracking reaction. On Ni-Y the cracking product was C_1$ both from the mixture of 1-butane and hydrogen and from n-butane. It may be that on Ni-Y, n-butane is dehydrogenated to butenes and subsequently hydro-cracked to C_1$.

  • PDF

Comparison of Combustion and Emission Characteristics of Propane and n-butane in a Stratified DISI Engine (성층연소 직분식 엔진에서의 propane과 n-butane의 연소 및 배기특성 비교)

  • Joo, Yongjoon;Jung, Jinyoung;Bae, Choongsik
    • 한국연소학회:학술대회논문집
    • /
    • 2014.11a
    • /
    • pp.97-100
    • /
    • 2014
  • The combustion and emission characteristics of propane and n-butane which are the main components of LPG were compared with gasoline. The experiment was performed in a stratified DISI engine under lean combustion conditions. Mixtures of propane and n-butane wre more homogeneous because propane and n-butane have better evaporation characteristics. As a result, combustion speeds of n-butane and propane were slower, and emission levels of NOx and PM were lower. However, in spite of better evaporation, PM from propane was higher.

  • PDF

부탄 이용 미생물에 의한 MTBE(Methyl tert-Butyl Ether) 분해 특성

  • 장순용;백승식;이시진
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
    • /
    • 2001.04a
    • /
    • pp.136-139
    • /
    • 2001
  • In this study, we have examined potential degradation of MTBE (methy1 tert-butyl ether) by pure culture ENV425 and mixed culture isolated from gasoline contaminated soil using n-butane as the sources of carbon and energy. The results described in this study suggest that MTBE is degraded cometabolically by ENV425 and mixed culture grown n-butane, and the disappearance of TBA after complete degradation of MTBE suggest the further degradation of TBA. Butane and MTBE degradation was completely inhibited by acetylene, which indicated that both substrates were degraded by butane-utilizing bacteria. MTBE was degraded ENV425 and mixed culture grown n-butane, and TBA (tert-butyl alcohol) was produced as product of MTBE oxidation. TBA production was accounted 54.7% and 58.6% for MTBE oxidation by ENV425 and mixed culture, respectively. The observed maximal transformation yield (T$_{y}$) were 44.7 and 34.0 (nmol MTRE degraded/$\mu$mol n-butane Utilized) by ENV425 and mixed culture, respectively.y.

  • PDF