检索结果-南通市图书馆

B-COPNA resin formation from ethylene tar light fractions:Process development and mechanical exploration by molecular simulation

引用

Chinese Journal of Chemical Engineering 2024年第6期70卷 118-129页

作者： Hongyan Shen Lingrui Cui Xingguo Wei Yuanqin Zhang Lian Cen Jun Xu fahai cao Engineering Research Center of Large Scale Reactor East China University of Science and TechnologyShanghai 200237China

An efficient utilization strategy of ethylene tar(ET),the main by-product of the ethylene cracking unit,is urgently required to meet demands for modern petrochemical *** the other hand,condensed polynuclear aromatic resin of moderate condensation degree(B-COPNA)is a widely used carbon material due to its superb processability,the production of which is,however,seriously limited by the high cost of raw *** such context,an interesting strategy was proposed in this study for producing B-COPNA resin using crosslinked light fractions of ethylene tar(ETLF,boiling point<260℃)facilitated by molecular simulation.1,4-Benzenedimethanol(PXG)was first selected as the crosslinking agent according to the findings of molecular *** effects of operating conditions,including reactions temperature,crosslinking agent,and catalyst content on the softening point and yield of B-COPNA resin products were then investigated to optimize the *** reaction mechanism of resin production was studied by analyzing the molecular structure and transition state of ETLF and crosslinking *** was shown that PXG exhibited a superior capacity of withdrawing electrons and a higher electrophilic reactivity than other crosslinking *** addition to the highest yield and greatest heat properties,PXG-prepared resin contained the most condensed *** corresponding optimized conditions of resin preparation were 180℃,1:1.9(PXG:ETLF),and 3%(mass)of catalyst content with a resin yield of 78.57%.It was the electrophilic substitution reaction that occurred between the ETLF and crosslinking agent molecules that were responsible for the resin formation,according to the experimental characterization and molecular ***,it was confirmed that the proposed strategy and demonstrated process can achieve a clean and high value-added utilization of ETLF via B-COPNA resin preparation,bringing huge economic value to the current petrochemical industry.

关键词： Ethylene tar Crosslinking COPNA resin Molecular simulation Transient state

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hydrodesulfurization catalyst prepared by urea-matrix combustion method

引用

Particuology 2012年第4期10卷 468-474页

作者： Dongmei Jiao YeyongMa fahai cao School of Chemical Engineering East China University of Science and Technology130 Meilong RoadShanghaiChina Luoyang Petrochemical Complex of SINOPEC 1 Zhongyuan RoadLuoyangChina Petro-Cyber Works Information Technology Co. Ltd.192 Eshan RoadShanshaiChina

Co-Mo/γ-Al2O3-TiO2 hydrodesulfurization （HDS） catalyst samples prepared by a urea matrix combustion （UMxC） method, were evaluated in a stainless tubular fixed-bed reactor, with thiophene, benzothiophene and dibenzothiophene in xylene as model feedstocks. The samples were pre-sulfurized using a cyclohex- ane solution of 3% CS2 and then tested for the HDS reaction. The test results were compared with catalysts prepared by conventional methods involving sequential impregnation （SI） and co-impregnation （CI）. The catalysts were characterized using X-ray diffraction （XRD）, laser Raman spectroscopy （LRS）, high resolu- tion transmission electron microscopy （HRTEM） and N2 physisorption, showing that the UMxC catalyst had higher pore volume and surface area than those prepared by the CI and SI methods. The UMxC method increased metal loading and avoided formation of inert phase, e.g., β-CoMoO4, for the HDS reaction, sug- gesting that UMxC method is superior to the conventional impregnation techniques. TiO2 promoter made particles on the catalyst surface closer and alleviated the interaction between molybdenum oxide and the support, and facilitated the formation of well-dispersed Co- and Mo-oxo species on catalyst surface, thus resulting in higher HDS catalytic activity than pure γ-Al2O3 support without modifiers. Consequently, the addition of TiO2 obviously improved the HDS conversion of dibenzothiophene.

关键词： HydrodesulfurizationCo-Mo catalystAl2O3-TiO2 supportUrea-matrix combustion methodPreparation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于机器学习的CO_(2)催化加氢制航空煤油筒式反应器数学模拟分析与优化

引用

低碳化学与化工 2024年第7期49卷 120-128页

作者：黄成刘操黄磊崔灵瑞马宏方曹发海华东理工大学化工学院上海200237 华东理工大学化工学院大型工业反应器工程教育部工程研究中心上海200237

借助Fe基催化剂,CO_(2)通过加氢反应可成功转化为高附加值的航空煤油,具有很好的工业应用潜力。目前缺少准确适宜的CO_(2)加氢合成航空煤油的反应器模型,因此亟需对其反应模型进行构建,为相关工艺的工业化提供参考。通过机器学习探究实... 详细信息

借助Fe基催化剂,CO_(2)通过加氢反应可成功转化为高附加值的航空煤油,具有很好的工业应用潜力。目前缺少准确适宜的CO_(2)加氢合成航空煤油的反应器模型,因此亟需对其反应模型进行构建,为相关工艺的工业化提供参考。通过机器学习探究实验条件和关键组分CO和CO_(2)物质的量分数关系,构建了关键组分CO和CO_(2)预测模型;基于Anderson-Schulz-Flory分布规律,构建了碳链增长模型,进一步构建了产物分布模型;基于催化床层物料衡算、热量衡算和压降计算,建立了筒式固定床反应器的一维拟均相模型;通过模拟一定工艺条件得到了CO_(2)加氢合成航空煤油的反应结果,并对工艺条件进行了模拟优化。模拟结果表明,反应器进口温度升高、空速增大,CO_(2)转化率降低,航空煤油集总组分C_(11)H_(24)时空产率增加;操作压力增大,CO_(2)转化率增加,C_(11)H_(24)时空产率在反应压力为2.0 MPa时最高;饱和沸腾水温度升高,CO_(2)转化率和C_(11)H_(24)时空产率增加。最佳CO_(2)加氢制航空煤油反应条件:反应器进口温度为275℃、进口压力为2.0 MPa、空速为4000 h-1和饱和沸腾水温度为294℃。此时CO_(2)转化率为21.95%,C_(11)H_(24)时空产率为12.14g/(L·h),床层压降为0.20MPa。

关键词： CO_(2)加氢航空煤油机器学习筒式固定床反应器反应器模拟

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Carbon-based derivatives from metal-organic frameworks as cathode hosts for Li–S batteries

引用

Journal of Energy Chemistry 2019年第11期28卷 94-113页

作者： Qingping Wu Xuejun Zhou Jun Xu fahai cao Chilin Li State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

Lithium-sulfur batteries(Li–S batteries) are promising candidates for the next generation high-energy rechargeable Li batteries due to their high theoretical specific capacity(1672 m Ahg-1) and energy density(2500 Wh kg-1). The commercialization of Li–S batteries is impeded by several key challenges at cathode side, e.g. the insulating nature of sulfur and discharged products(Li2S 2 and Li2S), the solubility of long-chain polysulfides and volume variation of sulfur cathode upon cycling. Recently, the carbonbased derivatives from metal-organic frameworks(MOFs) has emerged talent in their utilization as cathode hosts for Li–S batteries. They are not only highly conductive and porous to enable the acceleration of Li +/e-transfer and accommodation of volumetric expansion of sulfur cathode during cycling, but also enriched by controllable chemical active sites to enable the adsorption of polysulfides and promotion of their conversion reaction kinetics. In this review, based on the types of MOFs(e.g. ZIF-8, ZIF-67, Prussian blue, Al-MOF, MOF-5, Cu-MOF, Ni-MOF), the synthetic methods, formation process and morphology, structural superiority of MOFs-derived carbon frameworks along with their electrochemical performance as cathode host in Li–S batteries are summarized and discussed.

关键词： Lithium-sulfur batteries Carbon-based derivatives Metal-organic frame works Cathode host

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pretreatment of Alumina and Its Influence on the Properties of Co/Alumina Catalysts for Fischer-Tropsch Synthesis

引用

Journal of Natural Gas Chemistry 2007年第3期16卷 308-315页

作者： Chen Li Qiwen Sun fahai cao Weiyong Ying Dingye Fang State key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology Shanghai 200237 China School of Chemistry and Chemical Engineering Henan University of Technology Zhengzhou 450001 Henan China Yankuang Energy R ＆ D Co. Ltd. Shanghai 201203 China

16.6%Co/γ-Al2O3 catalysts prepared by incipient wetness impregnation method were used for Fischer-Tropsch synthesis. The support was pre-treated with different concentration of NH4NO3 aqueous solution. The effect of support pre-treatment on the properties of support and performance of supportedcobalt-based catalysts was investigated. To treat the support with NH4NO3 aqueous solution enlarged the pore of γ-Al2O3, decreased the impurity Na2O content, and weakened the surface acidity of γ-Al2O3. The change in the properties of the support decreased the interaction between cobalt species and support, enhanced the CO hydrogenation rate and the C5＋ selectivity. For all catalysts, increasing the reaction temperature increased the CO hydrogenation rate or the CO conversion, slightly decreased the total hydrocarbon selectivity, and favored the formation of methane and light hydrocarbons, while the chain growth probability decreased. For 16.6%Co/γ-Al2O3 catalysts, prepared with the support treated with 100 g/L NH4NO3 aqueous solution, the CO conversion, the CH4 selectivity, and the C5＋ selectivity were 83.13%, 6.86% and 82.75% respectively, and the chain growth probability was 0.83 under the condition of 493 K, 1.5 MPa, 500 h-1 and the molar ratio of H2 to CO being 2.0 in feed.

关键词： Fischer-Tropsch synthesis support pretreatment characterization C0/γ-Al2O3 CO conversion heavy hydrocarbon synthesis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modification of FCC slurry oil and deoiled asphalt for making high-grade paving asphalt

引用

Chinese Journal of Chemical Engineering 2022年第4期35卷 300-309页

作者： Lingrui Cui Jun Xu Mannian Ren Tao Li Dianhua Liu fahai cao Large Industrial Reactor Engineering Research Center of Ministry of Education East China University of Science and TechnologyShanghai 200237China Sinopec Luoyang Company Luoyang 471003China

With the rapid development of modern industry,high-grade paving asphalt is massively required to meet the demands for modern *** one of additives,natural asphalt is indispensable since it can improve the performance of paving asphalt in all ***,the application of non-renewable natural asphalt is increasingly restricted by its limited *** is imperative to find alternative approaches to produce high-grade paving *** catalytic cracking(FCC)slurry oil is an ideal soft component for producing paving asphalt due to its high content of aromatics and ***,its bad ageing resistance limits its application to only low-grade paving *** the present work,a novel approach for producing high-grade paving asphalt was investigated using chemically modified FCC slurry oil and deoiled asphalt(DOA).The FT-IR and NMR results showed that dehydrogenation and condensation reaction occurred during the ageing *** a series of aliphatic alcohols and aldehydes,propanal was selected as a proper modifier to improve the ageing resistance of FCC slurry *** propanalmodified slurry oil possessed more substituted aromatic units and less aromatic hydrogen atoms than other modified slurry oils,thus showing better ageing *** the increase of length of aliphatic chains in modifier,the modified slurry oil contained more and longer alkyl substituent group on *** with the cross-linked oil(slurry oil modified by cross-linking agent),modified slurry oil possessed similar ageing resistance but higher flowing ***,the effect of operation conditions on the kinematic viscosity of modified slurry oil were *** with modified slurry oil,the penetration ratio of asphalt product increased from 53.7 to 66.2,which met the standard of 70#paving *** the microscopic observations and FT-IR results indicated that modification process effectively reduced the oxidation degree of asphalt product,thu

关键词： Paving asphalt FCC slurry oil Ageing resistance Fuel Petroleum Chemical reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of the Different Supports on the Activity and Selectivity of Iron-Cobalt Bimetallic Catalyst for Fischer-Tropsch Synthesis

引用

Journal of Natural Gas Chemistry 2006年第4期15卷 335-339页

作者： Xiangdong Ma Qiwen Sun fahai cao Weiyong Ying Dingye Fang State key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology Shanghai 200237 China Shanghai Yankuang Energy R＆D Co. Ltd. Shanghai 201203 China

Silica, alumina, and activated carbon supported iron-cobalt catalysts were prepared by incipient wetness impregnation. These catalysts have been characterized by BET, X-ray diffraction （XRD）, and temperature-programmed reduction （TPR）. Activity and selectivity of iron-cobalt supported on different carriers for CO hydrogenation were studied under the conditions of 1.5 MPa, 493 K, 630 h^-1, and H2/CO ratio of 1.6. The results indicate that the activity, C4 olefin/（C4 olefin＋C4 paraffin） ratio, and C5 olefin/（C5 olefin＋C5 paraffin） decrease in the order of Fe-Co/SiO2, Fe-Co/AC1, Fe-Co/Al2O3 and Fe- Co/AC2. The activity of Fe-Co/SiO2 reached a maximum. The results of TPR show that the Fe-Co/SiO2 catalyst is to some extent different. XRD patterns show that the Fe-Co/SiO2 catalyst differs significantly from the others; it has two diffraction peaks. The active spinel phase is correlated with the supports.

关键词： Fischer-Tropsch synthesis bimetallic catalyst iron cobalt support silica alumina active carbon syngas

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Thermodynamic analysis of liquid phase in situ hydrogenation of glycerol for 1,3-propanediol synthesis

引用

Frontiers of Chemical Science and Engineering 2011年第1期5卷 67-73页

作者： Kun OUYANG Yu HUANG Haoyi CHEN Tao LI fahai cao Dingye FANG School of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

Based on the combination of the glycerol aqueous-phase reforming(APR)and catalytic hydrogenation of glycerol,a novel reaction system of liquid phase in situ hydrogenation of glycerol for the synthesis of 1,3-propanediol is proposed,in which hydrogen is produced from glycerol aqueous-phase reforming in the same *** this new system,the glycerol is the raw material of the aqueous-phase reforming reaction;the hydrogen generated from the APR of glycerol can be quickly transformed to the in situ hydrogenation of glycerol to produce 1,3-propanediol,which can improve the selectivity of hydrogen for the APR process of ***,thermodynamic calculation of the coupling processes was carried out,and standard molar enthalpies and equilibrium constants of foregoing reactions were *** above calculation results indicate that the combination process is feasible for 1,3-propanediol synthesis.

关键词： glycerol aqueous-phase reforming 1 3-propanediol in-situ reduction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Alkylation of Toluene with 1,3-Pentadiene over [bupy]BF4-AlCl3 Ionic Liquid Catalyst

引用

Chinese Journal of Chemical Engineering 2007年第5期15卷 680-682页

作者：田力曹发海房鼎业郭世卓 Research Institute of Chemical Technology East China University of Science and Technology Shanghai 200237 China Chemical Research Institute Shanghai Petrochemical Company Limited SINOPEC Shanghai 200540 China

The alkylation of toluene with 1,3-pentadiene to produce pentyltoluene was carded out to obtain 2,6-dimethylnaphalene, which is an important intermediate during the production of 2,6-naphthalene dicarboxylic acid. Based on our previous work using anhydrous AlCl3 as catalyst, [bupy]BF4-AlCl3 ionic liquids were employed to catalyze the reaction of 1,3-pentadiene with toluene. The experimental results show that [bupy]BF4-AlCl3 ionic liquids are suitable for the reaction especially when the molar ratio of AlCl3 to [bupy]BF4 is 1.75 ： 1, and the reaction could proceed at the temperature as low as 0℃. It could be as active as pure AlCl3, but much more environmentally friendly.

关键词： [bupy]BF4-AlCl3 ionic liquids toluene 1,3-pentadiene pentenyltoluene

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

二氧化硅微球负载钌催化剂的制备及其在苯乙酮不对称氢转移反应中的应用

引用

化工学报 2016年第6期67卷 2340-2348页

作者：徐晓宁曹发海华东理工大学大型工业反应器工程教育部工程研究中心上海200237

采用一步原位聚合诱导沉淀法制得了形貌多样、结构复杂的二氧化硅介孔微球,将其与Noyori配体Ru Cl(p-cymene)[(R,R)-Ts-DPEN]络合制得负载型钌催化剂并应用于苯乙酮不对称氢转移反应。利用场发射扫描电镜和氮气等温吸脱附手段证明了二... 详细信息

采用一步原位聚合诱导沉淀法制得了形貌多样、结构复杂的二氧化硅介孔微球,将其与Noyori配体Ru Cl(p-cymene)[(R,R)-Ts-DPEN]络合制得负载型钌催化剂并应用于苯乙酮不对称氢转移反应。利用场发射扫描电镜和氮气等温吸脱附手段证明了二氧化硅微球和负载型钌催化剂的微球型介孔结构,结合透射电镜表明了钌元素均匀分布在二氧化硅微球上;通过红外光谱显示该催化剂与反应底物之间存在氢键作用;在此基础上考察了载体孔结构,反应条件等因素对催化性能的影响。研究结果表明,钌配体负载到具有小孔径、高比表面积的二氧化硅微球上有利于苯乙酮的不对称氢转移反应,由此引出介孔氧化硅微球的孔道限域效应对不对称催化反应的活性和光学选择性存在明显的促进作用。在40℃、0.2 ml苯乙酮的条件下反应16 h,负载型钌催化剂用于苯乙酮不对称转移加氢反应其转化率和对映选择性最高可分别达到64.1%和93.4%。

关键词：催化剂载体聚合诱导沉淀法二氧化硅限域效应

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：