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Improvement of gas sensing properties of carbon nanofibers based on polyacrylonitrile and pitch by steam activation
Jeongsik Kim, Hyung-Il Kim, Jumi Yun 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 5 36-40 (5 pages)
for a gas sensor material. Pitch nanofibers were properly fabricated by incorporating polyacrylonitrile as an electrospinning supplement component. Polyacrylonitrile/pitch nanofibers were activated with steam at various temperatures followed by subsequent carbonization to make carbon nanofibers with a highly conductive graphitic structure. Steam activation was effective in facilitating gas adsorption onto the carbon nanofibers due to the increased surface area. The carbon nanofibers activated at... -
Preparation of carbon discs using petroleum-based binder pitch reformed with carbon black
Sangmin Lee, Kyung Hoon Kim, Young-Seak Lee 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 13 84-87 (4 pages)
to control the pitch properties according to the manufacturing conditions so pitches are widely used [5-8]. Pitches are generally divided into coal tar-based pitches and petroleum-based pitches. The raw materials of the petroleum-based pitch are obtained through petroleum refining processes, such as fluidized catalytic cracking decant oil, vacuum residue and pyrolyzed fuel oil (PFO). These residue oils are reformed to petroleum-based pitches that are solid at room temperature and for which the... -
Effect of added mesophase pitch during the pitch synthesis reaction of PFO
Ji Hong Kim, Jong Gu Kim, Chul Wee Lee, Ki Bong Lee, Ji Sun Im 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 7 48-54 (7 pages)
by adding MP. One is an enhancement of thermal stability due to the high thermal property of the additive; the other is that the volatile compounds that were removed by vaporization of PFO during the thermal reaction can participate in the pitch synthesis reaction (PFO→pitch) more efficiently. The effect differs according to the amount of the additive. When the amount of the additive is less than 7 wt%, the first effect is dominant, whereas the second effect is dominant when the additive amount... -
Pitch based carbon fibers for automotive body and electrodes
Kap Seung Yang, Bo-Hye Kim, Seong-Ho Yoon 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 2 162-170 (9 pages)
Pitch is an attractive raw material for carbon fiber precursors due to its low cost stemming from its availability as a residue of coking and petroleum processes. Ford Motor Company reported a carbon fiber target price of $11.0/kg by using a fast cycle-time manufacturing method with carbon fiber in an inexpensive format, allowing for an average retail price of gasoline of $3.58/gallon. They also recommended the use of carbon fiber with strength of 1700 MPa, modulus of 170 GPa, and 1.5%... -
Comparison of cardiac function and coronary angiography between conventional pigs and micropigs as measured by multidetector row computed tomography
Young Keun Ahn, Jung Min Ryu, Hea Chang Jeong, Yun Hyeon Kim, Myung Ho Jeong, Min Young Lee, Sang Hun Lee, Jae Hong Park, Seung 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 2호 1 121-126 (6 pages)
Pigs are the most likely source animals for cardiac xenotransplantation. However, an appropriate method for estimating the cardiac function of micropigs had not been established. Computed tomography (CT) analysis aimed at estimating cardiac function and assessing the coronary arteries has not been carried out in micropigs. This study determined the feasibility of evaluating cardiac function in a micropig model using multidetector row computed tomography (MDCT) and compared the cardiac function... -
Dental imaging characterization of micropigs
Hye Yeon Lee , Mi Hyun Choi , Jin Hwa Chang , Joo Hyun Jung , Mi Eun Kim , Nam Soon Lee , Jun Young Kim , Min Cheol Choi 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 7 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2010, 제 50권 제 4호 8 311-317 (7 pages)
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Mesophase formation behavior in petroleum residues
Subhash Kumar, Manoj Srivastava 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 3 171-182 (12 pages)
Mesophase pitch is an important starting material for making a wide spectrum of industrial and advanced carbon products. It is produced by pyrolysis of petroleum residues. In this work, mesophase formation behavior in petroleum residues was studied to prepare environmentally- benign mesophase pitches, and the composition of petroleum residues and its influence on the mesophase formation was investigated. Two petroleum residues, i.e., clarified oil s (CLO-1, CLO-2) obtained from fluid catalytic... -
Preparation of needle coke from petroleum by-products
Humala Paulus Halim, Ji Sun Im, Chul Wee Lee 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2013, Vol.14 No.3 3 152-161 (10 pages)
