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高温气相炭化焦的物理结构及CO2气化活性 被引量:4
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作者 黄胜 吴幼青 +3 位作者 吴诗勇 高晋生 向军 张军营 《华东理工大学学报(自然科学版)》 CAS CSCD 北大核心 2011年第1期26-31,共6页
以石油醚和蒽油为原料,在炭化温度为1 000-1 300°C的条件下制备了两种气相炭化焦,主要考察了这两种高温气相炭化焦的物理结构和CO2气化活性,并与液相炭化焦和煤焦进行了对比。结果表明:石油醚气相炭化以裂解和缩聚反应并存,而蒽... 以石油醚和蒽油为原料,在炭化温度为1 000-1 300°C的条件下制备了两种气相炭化焦,主要考察了这两种高温气相炭化焦的物理结构和CO2气化活性,并与液相炭化焦和煤焦进行了对比。结果表明:石油醚气相炭化以裂解和缩聚反应并存,而蒽油气相炭化以缩聚反应为主;两种气相炭化焦的颗粒均为均匀的球形颗粒(粒径为0.1-0.5μm),且随炭化温度增加,颗粒粒径减小,焦块结构趋于致密化;炭化温度增加有利于气相炭化焦的碳微晶结构向有序化方向发展,在相同炭化温度下,气相炭化焦最具石墨化倾向,液相炭化焦次之,煤焦最小;炭的气化活性不是仅由碳微晶结构唯一决定的,不同炭化过程所形成焦的气化活性顺序为:煤焦〉气相炭化焦〉液相炭化焦。 展开更多
关键词 气相炭化 物理结构 碳微晶 化活性
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略论炭素科学的形成和进展——Ⅳ.气相炭化机理研究的历史和现状 被引量:2
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作者 钱树安 《炭素》 1996年第1期4-12,共9页
详尽地评述了由烃类高温气相热解形成的热解炭生成机理的研究发展史。本世纪初法国贝特洛和德国波恩等对热解炭生成机理持不同的学术观点。此后,直到30年代初,众多的国际知名学者相继在这一方面开展研究工作,并对表面炭沉积理论增添了... 详尽地评述了由烃类高温气相热解形成的热解炭生成机理的研究发展史。本世纪初法国贝特洛和德国波恩等对热解炭生成机理持不同的学术观点。此后,直到30年代初,众多的国际知名学者相继在这一方面开展研究工作,并对表面炭沉积理论增添了新的内容。50年代初,贝特洛的气相聚合论和波恩的表面直接分解论之争重又挑起,前者的代表为美国葛利兹代尔,后者代衣为俄国戴斯涅耳。最后金尼于50年代中后期的经典工作将两种意见统一成完整的理论。本文还简述了炭黑生成机理的各种理论,指出了目前占主导地位的理论观点。 展开更多
关键词 气相炭化 炭素 炭化
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Microstructures and formation mechanism of headstand pyrocarbon cones developed by electromagnetic-field-assisted CVD 被引量:3
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作者 涂川俊 黄启忠 +2 位作者 张明瑜 赵新奇 陈江华 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第10期2569-2577,共9页
Novel headstand pyrocarbon cones (HPCs) with hollow structure were developed on the surfaces of pyrocarbon layers of the carbon/carbon (C/C) composites at 650-750 °C by the electromagnetic-field-assisted chem... Novel headstand pyrocarbon cones (HPCs) with hollow structure were developed on the surfaces of pyrocarbon layers of the carbon/carbon (C/C) composites at 650-750 °C by the electromagnetic-field-assisted chemical vapor deposition in the absence of catalysts. The fine microstructures of the HPCs were characterized by high-resolution transmission electron microscopy. The results show that the textural features of the HPCs directly transfer from turbostratic structure in roots to a well-ordered high texture in stems. And the degree of high texture ordering decreases gradually from the stem to the tail of the HPCs. The formation mechanism of the HPCs was inferred as the comprehensive effect of polarization induction on electromagnetic fields and particle-filler property under disruptive discharge. 展开更多
关键词 headstand pyrocarbon cones chemical vapor deposition electromagnetic-field-assisted method fine microstructure formation mechanism
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Modification of pore size in activated carbon by benzene deposition and its effects on CH4/N2 separation 被引量:2
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作者 ZHANG Jin-hua CHE Yong-fang +1 位作者 LI Lan-ting BAO Peng-cheng 《Journal of Coal Science & Engineering(China)》 2011年第4期418-421,共4页
Anthracite coal was used as raw material to prepare activated carbons as the carbon support in the carbonization-activation process. Modification of the pore size of the activated carbon by chemical vapor deposition o... Anthracite coal was used as raw material to prepare activated carbons as the carbon support in the carbonization-activation process. Modification of the pore size of the activated carbon by chemical vapor deposition of carbon from benzene was examined. These samples were characterized by adsorption of N2 at 77 K and CH4 and N2 at 303 K. The microporosity of these samples was evaluated by the Dubinin-Astakhov Equation. The pore size distribution was obtained by the DFT method applied to the N2 adsorption data at 77 K. The separation selectivity was obtained by the Langmuir Equation. The surface morphology was characterized by an environmental scanning electron microscope. It was observed that all samples of carbon molecular sieves studied were microporous carbonaceous materials. CMS-2 prepared in the present study has a better N2/CH4 separation performance; it can satisfy the requirements of the pressure swing adsorption for concentrating CH4 from the N2/CH4 mixture gas. 展开更多
关键词 benzene deposition carbon molecular sieves adsorption property
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炭素专利
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《炭素技术》 CAS CSCD 2004年第2期27-27,共1页
公开号:2602329公开日:2004-02-04申请人:宁夏宁平炭素有限责任公司发明人:刘祯:杨志东发明名称:箱式炭素焙烧炉本实用新型涉及一种箱式炭素焙烧炉,该箱式炉包括下部炕体及其上部的若干个焙烧单元,其特征是:所述焙烧单元是由火墙及由火... 公开号:2602329公开日:2004-02-04申请人:宁夏宁平炭素有限责任公司发明人:刘祯:杨志东发明名称:箱式炭素焙烧炉本实用新型涉及一种箱式炭素焙烧炉,该箱式炉包括下部炕体及其上部的若干个焙烧单元,其特征是:所述焙烧单元是由火墙及由火墙隔开的上方开放式产品箱组成,所述火墙两端设有燃烧加热室,其内部设有加热火道。 展开更多
关键词 定型炭纤维复合材料 光电子空净化器 活性炭纤维 颗粒活性炭 复合炭罐 旋转式炭化活化及沉积两用炉 炭粒床除尘器
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