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Study on extraction of thiophene from model gasoline with brønsted acidic ionic liquids

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Frontiers of Chemical Science and Engineering 2011年第1期5卷 107-112页

作者： Xiaomeng WANG Mingjuan HAN Hui WAN Cao YANG guofeng guan College of Chemistry and Chemical Engineering Nanjing University of TechnologyNanjing 210009China College of Sciences Nanjing University of TechnologyNanjing 210009China

Brønsted acidic ionic liquids(ILs),N-methylimidazole hydrogen sulfate([HMIm]HSO_(4))and N-methylpyrrolidone hydrogen sulfate([HNMP]HSO_(4)),are synthesized and employed as extractants to extract thiophene from model gasoline(thiophene dissolved in noctane).The effect of extraction temperature,extraction time and volume ratio of ILs to model gasoline on desulfurization rates is ***,the optimal desulfurization conditions are obtained:the ratio of ILs to model gasoline is 1∶1,extraction temperature is 50℃ for[HMIm]HSO_(4)and 60℃ for[HNMP]HSO_(4),extraction time is 60 ***,the desulfurization rate of[HNMP]HSO_(4)for model gasoline is 62.8%,which is higher than that of[HMIm]HSO_(4)(55.5%)under optimal *** reason is discussed on the basis of the interaction energy between thiophene and ILs at the B3LYP/6-311++G(d,p)***,the total desulfurization rate of[HNMP]HSO_(4)and[HMIm]HSO_(4)reaches 96.4%and 94.4%,respectively,by multistage ***,the used ILs can be reused by vacuum drying,and their desulfurization rates are not significantly decreased after recycling 7 times in single-stage desulfurization.

关键词： brønsted ionic liquids model gasoline thiophene extraction density functional theory

One step method of structure engineering porous graphitic carbon nitride for efficient visible-light photocatalytic reduction of Cr(Ⅵ)

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Journal of Materials Science & Technology 2021年第12期71卷 211-220页

作者： Xueru Chen Yin Zhang Dashui Yuan Wu Huang Jing Ding Hui Wan Wei-Lin Dai guofeng guan State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 210009China Department of Chemistry&Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai 200433China

Porous g-C_(3)N_(4)nanosheets(PCN)were prepared by the nickel-assisted one-step thermal polymerization ***(H2)which was produced by the reaction between nickel(Ni)foam and ammonia(NH3)defined the structure and properties of *** the formation of PCN,the participation of H2 not only enhanced the spacing between layers but also boosted the specific surface area that more active sites were ***,H2 promoted pores formation in the nanosheets,which was beneficial to the transfer of photons through lamellar structure and improved the absorption efficiency of visible ***,the obtained PCN possessed better Cr(Ⅵ)photocatalytic reduction efficiency than pure g-C_(3)N_(4).The reaction rate constant(k)of PCN(0.013 min-1)was approximately twice that of bare g-C_(3)N_(4)(0.007 min-1).Furthermore,the effects of original pH and concentration of Cr(Ⅵ)-containing solution on re moval efficiency of Cr(Ⅵ)were explored.A possible photocatalytic mecha nism was proposed based on the experiments of radical scavengers and photoelectrochemical characterizations.

关键词： Porous carbon nitride Nickel foam Hydrogen Cr(VI) Photocatalysis

One-step fabrication of nitrogen-deficient carbon nitride through pyrolysis of melamine and 1,2,4-triazole for its enhanced photocatalytic degradation

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Green Chemical Engineering 2021年第3期2卷 317-326页

作者： Jing Ding Zongyuan Li Xueru Chen Yiwei Jiao Dashui Yuan Wei Du Hui Wan guofeng guan State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing210009China Department of Chemistry&Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai200433China

The construction of defects in semiconductor photocatalysts,as a kind of modification methods,plays an indispensable role in the enhancement of the photocatalytic ***,nitrogen defects were successfully introduced into the framework of graphite carbon nitride(CN-T_(x))through thermal polymerization with melamine and 1,2,4-triazole as *** existence of nitrogen defects in CN-T_(x) were confirmed to be located at the two-coordinated(N_(2c))C■N-C lattice sites,which resulted in the destruction of its planar structure and the initiation of n-π^(*)electron transition that greatly expanded the response range to visible light and improved the separation efficiency of photogenerated charge *** significantly,CN-T_(x) could enhance photocatalytic water purification activity towards different kinds of *** photocatalytic rates of CN-T_(3) were estimated to be 2.54(tetracycline)and 2.31(2-hydroxynaphthalene)times higher than those of pristine ***,the possible photocatalytic degradation mechanism over CN-T_(x) photocatalyst was proposed by free radical trapping experiments combined with ERS *** work provides an in-depth understanding of the important role of nitrogen defects in the electronic structure and chemical properties of g-C3N4 and its photocatalytic water purification performance.

关键词： Nitrogen defect Carbon nitride 1,2,4-Triazole Photocatalysis Water purification

PTA醋酸甲酯水解过程厂级稳态模拟与集成优化

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化工学报 2016年第3期67卷 912-918页

作者：黄燕薄翠梅管国锋丁帅南京工业大学电气工程与控制科学学院江苏南京211816 南京工业大学化学化工学院江苏南京211816

针对PTA生产过程中副产物醋酸甲酯水解回收工艺,利用Aspen Plus软件进行厂级稳态流程模拟与集成优化设计。首先分析水解工艺的热力学、动力学性质,建立水解工艺稳态流程模拟结构,与实际生产数据对比分析验证稳态模拟结果的正确性;其次... 详细信息

针对PTA生产过程中副产物醋酸甲酯水解回收工艺,利用Aspen Plus软件进行厂级稳态流程模拟与集成优化设计。首先分析水解工艺的热力学、动力学性质,建立水解工艺稳态流程模拟结构,与实际生产数据对比分析验证稳态模拟结果的正确性;其次采用序贯优化法,以年生产成本最小化为目标,对工艺结构和操作参数进行优化,使工艺达到最佳操作条件且生产成本最低。

关键词：醋酸甲酯水解反应精馏优化设计稳态模拟

SO_4^(2-)/TiO_2-Al_2O_3固体酸催化剂的表征及其催化合成均苯四甲酸四异辛酯

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石油化工 2005年第7期34卷 643-647页

作者：管国锋谭强万辉南京工业大学化学化工学院南京江苏210009

用共沉淀法制备了系列SO42-/T iO2-A l2O3固体酸催化剂,用X射线衍射、NH3程序升温脱附、热重分析、X射线能谱、红外光谱、等温吸附等方法对SO42-/T iO2-A l2O3固体酸催化剂进行了表征。表征结果表明,SO42-/T iO2催化剂中加入A l可以阻止... 详细信息

用共沉淀法制备了系列SO42-/T iO2-A l2O3固体酸催化剂,用X射线衍射、NH3程序升温脱附、热重分析、X射线能谱、红外光谱、等温吸附等方法对SO42-/T iO2-A l2O3固体酸催化剂进行了表征。表征结果表明,SO42-/T iO2催化剂中加入A l可以阻止T iO2的晶化;增加固体超强酸表面酸强度和酸量;稳定催化剂表面的S,减少其在高温焙烧下的流失量;增大催化剂的比表面积。SO42-/T iO2-A l2O3固体酸催化剂在合成均苯四甲酸四异辛酯的反应中有很高的活性,在A l摩尔分数23.1%、焙烧温度400℃时,催化活性最好,反应2h后,转化率达到98.2%。

关键词：固体酸表征均苯四甲酸四异辛酯酸强度催化剂

SO_4^(2-)/TiO_2-Al_2O_3固体酸催化剂催化合成均苯四甲酸四异辛酯

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石油化工 2005年第4期34卷 372-375页

作者：谭强万辉管国锋南京工业大学化学化工学院南京江苏210009

以SO2-4/TiO2-Al2O3固体酸为催化剂、均苯四甲酸二酐和异辛醇为原料合成均苯四甲酸四异辛酯(TOPM)。考察了Al含量、硫酸的浓度、焙烧温度等因素对催化剂活性的影响。实验结果表明,在n(Ti)∶n(Al)=1∶0.3、硫酸的浓度为0.5mol/L、焙烧温... 详细信息

以SO2-4/TiO2-Al2O3固体酸为催化剂、均苯四甲酸二酐和异辛醇为原料合成均苯四甲酸四异辛酯(TOPM)。考察了Al含量、硫酸的浓度、焙烧温度等因素对催化剂活性的影响。实验结果表明,在n(Ti)∶n(Al)=1∶0.3、硫酸的浓度为0.5mol/L、焙烧温度为673K时催化剂活性最好。通过正交实验得到了最佳酯化反应工艺条件:催化剂用量(相对于均苯四甲酸二酐的质量)为1.8%、反应时间3.0h、异辛醇与均苯四甲酸二酐摩尔比为7∶1;在该条件下,均苯四甲酸二酐的转化率可达到99.60%。催化剂重复使用7次后,均苯四甲酸二酐的转化率仍可达到96.50%。利用红外光谱对产品进行分析,结果显示,产物中没有副产物,反应选择性很高。

关键词：固体酸催化剂酯化均苯四甲酸二酐异辛醇均苯四甲酸四异辛酯

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硅胶负载酸性离子液体催化剂的制备及性能

化学反应工程与工艺 2008年第6期24卷 503-508页

作者：张继申万辉管国锋南京工业大学化学化工学院江苏南京210009

以硅胶为载体,采用键合接枝法制备负载化 Brnsted 酸性离子液体催化剂[(TESP)MIm]HSO_4/silica gel,利用元素分析、傅立叶变换红外光谱(FT-IR)和热重-差示扫描量热法(TGA-DSC)等方法对催化剂结构进行了表征。结果表明,离子液体[(TESP)MI... 详细信息

以硅胶为载体,采用键合接枝法制备负载化 Brnsted 酸性离子液体催化剂[(TESP)MIm]HSO_4/silica gel,利用元素分析、傅立叶变换红外光谱(FT-IR)和热重-差示扫描量热法(TGA-DSC)等方法对催化剂结构进行了表征。结果表明,离子液体[(TESP)MIm]HSO_4负载量为1.503 mmol/g 的负载催化剂具有良好的热稳定性和重复使用性能。将其应用于乙酸和正丁醇的酯化反应,较佳反应条件为96℃,正丁醇0.12 mol.乙酸0.10 mol,环己烷用量6 mL,催化剂用量为反应物总质量的4%,反应3 h 时,酯化率可达99.4%,催化剂重复使用6次后,酯化率仍可达到74.7%。

关键词：硅胶 Bronsted酸性离子液体键合负载酯化反应乙酸丁酯

N-甲基乙酰胺用于萃取精馏乙酸脱水过程机理

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化工学报 2007年第1期58卷 141-144页

作者：李新利唐聪明管国锋西华师范大学化学化工学院四川南充637002 南京工业大学化学化工学院江苏南京210009

N-methylacetamide（NMA） was used as entrainer in separating acetic acid from water with extractive distillation,and the interaction mechanism in this process was studied by using the density functional *** optimization geometries and vibration frequencies of NMA-acetic acid and NMA-water complexes were calculated at the B3LYP/6-311G（d,p） *** the basis set superposition error（BSSE） correction and the zero point vibration energy（ZPE） correction,the interaction energies for three types of NMA-acetic acid complexes and one type of NMA-water complex were-44.3,-35.5,（-32.4） and-16.0 kJ·mol-1 respectively,which showed that NMA had a great affinity for acetic acid than *** boiling point of the NMA-acetic acid complex was higher than that of acetic acid so that acetic acid is easily preserved in the liquid phase,which is in agreement with the VLE experiment for NMA+acetic acid+water system that gave a relative volatility of 3.0—*** results of natural bond orbital（NBO） population analysis revealed that there was charge-transfer in the complex formation,and acetic acid acted as electron acceptor during this transformation.

关键词：萃取精馏机理乙酸 N-甲基乙酰胺

1-(3-磺酸基)丙基-3-甲基咪唑磷钨酸盐的制备及其催化性能

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石油化工 2009年第12期38卷 1270-1275页

作者：许妍万辉管国锋南京工业大学化学化工学院南京江苏210009

以N-甲基咪唑、1,3-丙烷磺内酯、磷钨酸为原料,采用两步法合成了1-(3-磺酸基)丙基-3-甲基咪唑磷钨酸盐([MIMPS]_3PW_(12)O_(40))催化剂。利用X射线衍射、傅里叶变换红外光谱(FTIR)、热重-示差扫描量热分析对催化剂进行了表征,表征结果显... 详细信息

以N-甲基咪唑、1,3-丙烷磺内酯、磷钨酸为原料,采用两步法合成了1-(3-磺酸基)丙基-3-甲基咪唑磷钨酸盐([MIMPS]_3PW_(12)O_(40))催化剂。利用X射线衍射、傅里叶变换红外光谱(FTIR)、热重-示差扫描量热分析对催化剂进行了表征,表征结果显示,[MIMPS]_3PW_(12)O_(40)催化剂中有8个结晶水,具有磷钨酸的Keggin结构和良好的热稳定性。将该催化剂用于合成乙二醇丁醚醋酸酯(BAC),在最佳工艺条件(反应时间2.0 h,乙二醇丁醚与醋酸的摩尔比1.2:1,反应温度120℃,催化剂与反应物的质量比0.04,带水剂环己烷与反应物的质量比0.3)下,BAC收率可达99.3%。反应后催化剂易分离,重复使用9次后BAC收率为86.8%。FTIR表征结果显示,产物为BAC,没有副产物生成。

关键词：磷钨酸 1-(3-磺酸基)丙基-3-甲基咪唑磷钨酸盐离子液体催化剂酯化反应