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国家教育部博士点基金(20091404120002)

作品数:6 被引量:11H指数:2
相关作者:王宝凤张进军韩少华闫晓敏黄亚茹更多>>
相关机构:山西师范大学临汾职业技术学院更多>>
发文基金:国家教育部博士点基金山西省青年科技研究基金山西省自然科学基金更多>>
相关领域:化学工程动力工程及工程热物理冶金工程石油与天然气工程更多>>

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Copolymer-homopolymer mixtures in a nanopore
2013年
We have performed the cell dynamics simulation with the time-dependent Ginzburg-Landau theory to study the selfassembled morphology of A-B diblock copolymers and C homopolymers in a neutral nanopore. The nanopore diameter and length are systematically varied to examine their effects on the structures of various morphologies and their phase transition. From the simulation, it is observed that the equilibrium morphology of the confined system is sensitive to pore diameter D and pore length Lpore , the phase behavior in neutral nanopores is due to an interplay of two factors: the surface effect and the extension effect. When the nanopore length and the lamellae spacing are not commensurate, the surface effect prevails at small nanopores (small diameters or short lengths), the extension effect takes over at larger nanopores (large diameters or long lengths). When the nanopore length and the lamellae spacing are commensurate, the surface effect dominates. Furthermore, the interactions between different monomers are also discussed and we obtain a transition from a tilted pancakes/cylinder structure (L⊥tilted ) to a concentric cylindrical structure with defects and to a concentric cylindrical structure (L|| ). We also investigate the effect of the relative concentrations of diblock copolymer-homopolymer and obtain a transition in which the position of the C blocks changes from the outer of the cylinder to the middle of the cylinder and then to the inner of the cylinder with the concentration of the C blocks decreasing.
张玲翠孙敏娜潘俊星王宝凤张进军武海顺
关键词:二嵌段共聚物纳米孔均聚物
离子液体作用下褐煤与生物质在亚临界水中共液化被引量:5
2015年
选用小麦秸秆和金沟褐煤作为实验原料在间歇式高压反应釜中进行液化实验,考察了不同温度、不同秸秆/煤比例下添加离子液体时小麦秸秆与褐煤共液化产物分布情况及硫的变迁行为。研究结果显示:当小麦秸秆和褐煤在亚临界水中液化时,添加离子液体1-丁基3-甲基咪唑氯盐[Bmim]Cl会降低正己烷不溶组分收率,但可以提高气体收率与总转化率。添加[Bmim]Cl后,随着样品中小麦秸秆比例减少,液化油收率、正己烷不溶组分收率、四氢呋喃可溶组分收率、气体收率与总转化率均呈下降趋势。添加[Bmim]Cl后残渣中硫的相对含量增加,其他产物中硫的相对含量减小;添加[Bmim]Cl后残渣中有机硫的相对含量以及气相中COS和H2S含量都随温度升高而增加。
韩少华闫晓敏王宝凤张进军
关键词:生物质褐煤离子液体液化
煤慢速升温热解过程中冠醚对硫脱除率的影响被引量:1
2013年
在固定床反应器中研究了团柏煤中硫在氮气气氛下随温度、停留时间的变迁规律,并考察了煤慢速升温热解过程中添加18-冠-6或二苯并-18-冠-6对硫脱除率的影响。结果表明:在煤热解过程中添加18-冠-6或二苯并-18-冠-6都有利于总硫的脱除;当热解温度大于550℃时,相同条件下添加二苯并-18-冠-6时总硫的脱除效果明显优于添加18-冠-6;在煤热解过程中,添加二苯并-18-冠-6也可提高有机硫的脱除率;当热解温度小于650℃时,添加18-冠-6或二苯并-18-冠-6,同时可明显提高黄铁矿硫的脱除率。通过对热解半焦进步的脱附实验和孔结构分析,发现在原煤热解过程中,添加18-冠-6或二苯并-18-冠-6,可以使半焦平均孔径变大。
王宝凤亢强朱永满李丽荣黄亚茹张进军
关键词:热解冠醚
Study on the influence of crown ether on arsenic behavior during coal pyrolysis被引量:2
2013年
Bao-Feng WANG Li-Rong LI Yong-Man ZHU Qiang KANG Jin-Jun ZHANG
关键词:煤热解过程脱砷冠醚二苯并
Hydrothermal Liquefaction of Wheat Straw in Sub-critical Water/Ethanol with Ionic Liquid for Bio-oil Production被引量:2
2015年
Hydrothermal liquefaction of wheat straw in sub-critical water with ionic liquid was investigated in an autoclave. The product distribution at different temperatures and pressures was studied. The liquid oil and the residuals were tested by 1H NMR, FTIR and SEM techniques. The results indicated that under the same conditions, the oil yield from liquefaction of wheat straw in water/ethanol was higher than that in sub-critical water. The result also showed that under the investigated conditions, adding 1-butyl-3-methylimidazolium chloride([Bmim]Cl) could increase the total conversion and gas yield, while at the same time the yield of n-hexane insoluble fraction and the tetrahydrofuran soluble fraction was reduced. Moreover, the results also showed that upon adding [Bmim]Cl the contents of the aliphatic hydrogen and phenols in liquid oil also increased along with improved oil quality.
Wang BaofengHan ShaohuaZhang Jinjun
关键词:亚临界水液化油小麦秸秆
Sulfur Distribution during Hydrothermal Liquefaction of Lignite, Wheat Straw and Plastic Waste in Sub-Critical Water被引量:1
2015年
The distribution and transformation of sulfur in products during hydrothermal liquefaction of lignite, wheat straw and plastic waste in sub-critical water were investigated in an autoclave. The influence of blending ratio, temperature, initial nitrogen pressure, residence time and additives on sulfur distribution was studied systematically. The results showed that most of sulfur existed as organic sulfur and transferred into the residue, and only a small part of sulfur transferred into oil and gas during hydrothermal liquefaction of lignite, wheat straw and plastic waste in sub-critical water. The results also showed that lower temperature(less than 300 ℃) was favorable for obtaining oil with low sulfur content. It can be also seen from the results that the best condition to obtain the oil with low sulfur content should be implemented at a lignite/wheat straw/plastic waste blending ratio of 5:4:1, an initial nitrogen pressure of 3 MPa and a residence time of 30 minutes. Furthermore, the results indicated that adding tourmaline during hydrothermal liquefaction of lignite, wheat straw and plastic waste was beneficial to production of oil with low sulfur content.
Wang BaofengHuang YaruZhang Jinjun
关键词:WHEATHYDROTHERMALSULFUR
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