"pitch" 검색결과 1-20 / 2,808건

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  Effect of added mesophase pitch during the pitch synthesis reaction of PFO

  This research considers the effect of added mesophase pitch (MP) as an additive during the pitch synthesis ... synthesis reaction (PFO→pitch) more efficiently. ... compounds that were removed by vaporization of PFO during the thermal reaction can participate in the pitch

  논문 | 7페이지 | 4,000원 | 등록일 2023.04.05

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  Properties of pitch‑like materials obtained using coal extraction

  The extracts obtained at 380 °C represented pitch-like solid matter with the softening points of 72–127

  논문 | 10페이지 | 4,000원 | 등록일 2023.05.08

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  Catalytic hydrogenation-assisted preparation of melt spinnable pitches from petroleum residue for making mesophase pitch based carbon fibers

  We demonstrated an effective way of preparing melt spinnable mesophase pitches via catalytic hydrogenation ... The mesophase pitches thus obtained were analyzed in terms of their viscosity, elemental composition, ... The mesophase pitch with entirely anisotropic domains of flow texture exhibited good meltspinnability

  논문 | 8페이지 | 4,000원 | 등록일 2023.04.05 | 수정일 2023.04.06

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  Mesophase pitch production aided by the thermal decomposition of polyvinylidene fluoride

  We believe that this work provides an effective option for mesophase pitch production. ... The facile production of high-purity mesophase pitch has been a long-standing desire in various carbon ... The mesophase content and structural, chemical, and thermal properties of pitches obtained with different

  논문 | 7페이지 | 4,000원 | 등록일 2023.05.08

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  Preparation of petroleum‑based binder pitch for manufacturing thermally conductive carbon molded body and comparison with commercial coal‑based binder pitch

  , and in the range of 300 to 475 °C in the coal-based binder pitch. ... and 102.8 W/mK for those prepared by using the petroleum-based binder pitch. ... lowest at 46.0% in the petroleum-based binder pitch (softening point 116 °C).

  논문 | 7페이지 | 4,000원 | 등록일 2023.04.24

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  실내 라돈가스 제거를 위한 Pitch계 활성탄소섬유 제조 및 특성연구

  본 연구에서는 열분해잔사유(Pyrolysis Fuel Oil, PFO)를 이용한 Pitch계 활성탄소섬유를 제조하였다. ... 제조한 Pitch계 활성탄소섬유를 라돈 연속측정방법을 통해 48시간 동안 측정한 결과 샘플 모두 라돈 흡착성능을 보였다. ... 제조한 Pitch안정화 섬유의 탄화 및 활성화 온도를 850, 880, 900 ℃로 달리하여 각각 다른 샘플의 기공형성에 대한 영향을 알아보기 위해 BET 와 SEM을 이용하여 비교

  논문 | 12페이지 | 4,300원 | 등록일 2023.04.05 | 수정일 2023.04.06

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  Structural evolution of the thermal conversion products of modified coal tar pitch

  Modified coal tar pitch is a high quality raw material for the preparation of intermediate phase pitch ... Coal tar pitch is a product with high carbon content and aromatic compounds. ... In this paper, modified coal tar pitch was used as raw material, nitrogen was used as protective gas,

  논문 | 11페이지 | 4,200원 | 등록일 2023.05.22

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  Effect of nitric acid treatment on the pitch properties and preparation of activated carbon

  acid treatment of pitch. ... The increased pitch molecular weight induced an increase of the pitch softening point. ... The nitric acid treatment introduced oxygen and nitrogen functional groups on pitch, and increased pitch

  논문 | 9페이지 | 4,000원 | 등록일 2023.05.08

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  Analysis of the Disposal Tunnel Spacing and Disposal Pit Pitch for the HLW Repository Design

  Also, an optimized disposal tunnel spacing and the disposal pit pitch reducing the excavation volume ... In this study, analysis of the disposal tunnel spacing and disposal pit pitch was carried out, as a factor

  논문 | 10페이지 | 4,000원 | 등록일 2023.04.05

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  Effects of heat treatment time on aromatic yield of pyrolysis fuel oil-derived pitches

  한국탄소학회 Carbon letters Hye Kyoung Shin, Min-Kang Seo, Yun Hyuk Bang, Soo-Jin Park

  논문 | 3페이지 | 3,000원 | 등록일 2023.04.05

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  Preparation of petroleum‑based mesophase pitch toward cost‑competitive high‑performance carbon fibers

  Petroleum mesophase pitch-based carbon fibers are produced by melt spinning of pitch precursors, followed ... Spinnable mesophase pitch precursor containing more than 98% mesophase content was successfully prepared ... automotive grade carbon fibers can be successfully prepared from FCC-DO derived petroleum mesophase pitches

  논문 | 10페이지 | 4,000원 | 등록일 2023.04.24

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  Blending effect of pyrolyzed fuel oil and coal tar in pitch production for artificial graphite

  The pitch yield changed with the blending ratio, while the softening point of the produced pitch was ... Pyrolyzed fuel oil (PFO) and coal tar was blended in the feedstock to produce pitch via thermal reaction ... The blended feedstock and produced pitch were characterized to investigate the effect of the blending

  논문 | 6페이지 | 4,000원 | 등록일 2023.04.05 | 수정일 2023.04.06

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  Mechanical and electrical properties of cement paste incorporated with pitch-based carbon fiber

  process (pitch-based CF), which is cheaper and more eco-friendly method because this pitch-based CF ... The compressive strength and electrical resistance of pitch-based carbon fiber (CF) in cementitious ... However, studies have revealed that construction materials with pitch-based CF are not popular.

  논문 | 8페이지 | 4,000원 | 등록일 2023.04.05

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  Ammonia etched petroleum pitch‑based porous carbon as efficient catalysts for CO2 electroreduction

  convenient method to synthesize N-doped porous carbon by ammonia etching the pyrolysis carbon of petroleum pitch ... only increase the pyridinic-N content, but also enlarge the specific surface area of the petroleum pitch-based

  논문 | 8페이지 | 4,000원 | 등록일 2023.05.08

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  Effects of pressurized PFO‑based pitch coking conditions on coke yield and graphite conductivity

  In the present study, pyrolyzed fuel oil (PFO)-based pitch without impurities was used to prepare coke ... than that of the coke prepared under normal pressure, because the low-boiling point materials of the pitch ... pressurized conditions than under the normal pressure, indicating that the low-boiling point materials of the pitch

  논문 | 7페이지 | 4,000원 | 등록일 2023.05.08

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  Effects of pressure during the synthesis of petroleum pitch precursors in open and closed systems

  for synthesizing cost-competitive pitch precursors for carbon materials. ... We examined the pressure effects on petroleum pitch synthesis by using open and closed reaction systems ... The pressure effects that occur during the pitch synthesis were investigated in three pressure systems

  논문 | 8페이지 | 4,000원 | 등록일 2023.04.05 | 수정일 2023.04.06

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  Preparation of pitch‑based activated carbon with surface‑treated fly ash for SO2 gas removal

  When fly ash is added in the preparation process of pitch-based activated carbon, the pitch particles ... gas removal performance, activated carbon was prepared by surface-treated fly ash and petroleum-based pitch

  논문 | 7페이지 | 4,000원 | 등록일 2023.04.24

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  Effects of coal tar pitch addition on the wear behavior of carbon/carbon composites

  한국탄소학회 Carbon letters Young Chan Jung, Duk Soo Kang, Kyong Yop Rhee, Soo Jin Park, David Hui

  논문 | 4페이지 | 3,000원 | 등록일 2023.04.05

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  Improvement of gas sensing properties of carbon nanofibers based on polyacrylonitrile and pitch by steam activation

  Polyacrylonitrile/pitch nanofibers were prepared by electrospinning as a precursor for a gas sensor ... Pitch nanofibers were properly fabricated by incorporating polyacrylonitrile as an electrospinning supplement ... Polyacrylonitrile/pitch nanofibers were activated with steam at various temperatures followed by subsequent

  논문 | 5페이지 | 4,000원 | 등록일 2023.04.05 | 수정일 2023.04.06

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  Pitch-based carbon fibers from coal tar or petroleum residue under the same processing condition

  Spinnable pitches and carbon fibers were successfully prepared from petroleum or coal pyrolysis residues ... Spinnable pitches were prepared for melt-spinning carbon fiber through a simple distillation under strong ... Even though spinnable pitches and carbon fibers were processed under the same conditions, the melt-spinning

  논문 | 7페이지 | 4,000원 | 등록일 2023.04.05

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