Abstract:The lack of electrical conductivity limits the electrochemical kinetic rate of the electrode material, resulting in the inability to reach its theoretical capacity. A facile method was adopted to improve intrinsic conductivity of hybrid nickel sulfide, with the usage of doping of transitional metal atoms Co, Mn and Ag. Through the introduction of heteroatoms, the electronic structure of the electrode material is modified and the electrical conductivity is significantly improved, thus enhancing its electrochemical performance. The improvement of conductivity are attributed to the forming of intermediate bands of transition metal and redistribution of electrons, and the result was demonstrated by experimental and density functional theory (DFT) calculations. As a result, the Co doped nickel sulfide with a 0.5% doping amount reach the highest specific capacitance of 2874 F/g at 1 A/g, increasing specific capacitance of 653 F/g as 29.4% of the specific capacity of non-doped nickel sulfide. The Co doped nickel sulfide also exhibits remarkable cycling stability compared with non-doped nickel sulfide. The assembled 2% Co-doped nickel sulfide//rGO, 0.5% Mn-doped nickel sulfide//rGO and 0.5% Ag-doped nickel sulfide//rGO asymmetric supercapacitors show a specific energy density of 36.6, 36.1 and 36.0 Wh/Kg at a power density of 800 Wh/Kg. This study will be a useful insight for fabrication of high performance pseudocapacitive materials.

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	1. Doping-driven electronic structure and conductivity modification of nickel sulfide
	XIAO Zhenyun,ZOU Xuefeng,XIANG bin
	Chemical Engineering 11 April 2021
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (2608K B)

	Abstract:The lack of electrical conductivity limits the electrochemical kinetic rate of the electrode material, resulting in the inability to reach its theoretical capacity. A facile method was adopted to improve intrinsic conductivity of hybrid nickel sulfide, with the usage of doping of transitional metal atoms Co, Mn and Ag. Through the introduction of heteroatoms, the electronic structure of the electrode material is modified and the electrical conductivity is significantly improved, thus enhancing its electrochemical performance. The improvement of conductivity are attributed to the forming of intermediate bands of transition metal and redistribution of electrons, and the result was demonstrated by experimental and density functional theory (DFT) calculations. As a result, the Co doped nickel sulfide with a 0.5% doping amount reach the highest specific capacitance of 2874 F/g at 1 A/g, increasing specific capacitance of 653 F/g as 29.4% of the specific capacity of non-doped nickel sulfide. The Co doped nickel sulfide also exhibits remarkable cycling stability compared with non-doped nickel sulfide. The assembled 2% Co-doped nickel sulfide//rGO, 0.5% Mn-doped nickel sulfide//rGO and 0.5% Ag-doped nickel sulfide//rGO asymmetric supercapacitors show a specific energy density of 36.6, 36.1 and 36.0 Wh/Kg at a power density of 800 Wh/Kg. This study will be a useful insight for fabrication of high performance pseudocapacitive materials.
	TO cite this article:XIAO Zhenyun,ZOU Xuefeng,XIANG bin. Doping-driven electronic structure and conductivity modification of nickel sulfide[OL].[11 April 2021] http://en.paper.edu.cn/en_releasepaper/content/4754605


	2. Research on Large Energy Integration and Heat Exchange Network Design Optimization of Oxidative Dehydrogenation Synthesis of Isoamylene
	Cheng Chen,Shi jianjun,Zuo Hui,Cao Xue,li Chaoxu,He Mingjie
	Chemical Engineering 27 September 2020
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (743K B)

	Abstract:The project adopts oxidative dehydrogenation method to synthesize isoamylene, and uses rectification tower and multi-stage separator to separate and purify finally to obtain chemical purity isoamylene main product and cyclopentane by-product, with an output of 198,000 tons/year. In this paper, we use Aspen Energy Analyzer V11.0 software to design and optimize the energy integration and heat exchange network of the overall process, looking for the most energy-saving measures to minimize energy consumption. By adopting two-stage organic Rankine recycling technology and heat pump technology. Among them, the two-stage organic Rankine cycle technology uses the hydrogen cold source containing high-quality cold energy separated by the hydrogen separation tower, and saves the amount of public works through heat exchange between the cold source and the river water in the river near the site. So as to achieve the purpose of energy saving. The heat pump technology makes full use of the rectification tower with a small difference between the top and the bottom of the tower. By changing the temperature of the steam, it is possible to exchange heat for streams that could not exchange heat, thereby increasing the ratio of recoverable energy and achieving a greater degree Energy saving. Through this optimization measure, the converted energy saving is 99.74MW, which requires 64.48MW of cold utilities and 35.26MW of heat utilities, which achieves a greater degree of energy recovery.
	TO cite this article:Cheng Chen,Shi jianjun,Zuo Hui, et al. Research on Large Energy Integration and Heat Exchange Network Design Optimization of Oxidative Dehydrogenation Synthesis of Isoamylene[OL].[27 September 2020] http://en.paper.edu.cn/en_releasepaper/content/4752876

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	3. Recovery of excess cold energy from low-temperature hydrogen based on ASPEN PLUS two-stage Organic Rankine Cycling technology
	Cheng Chen,Shi Jianjun,Zu Runyin,Meng Wangbin,Ji Ke
	Chemical Engineering 07 September 2020
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (270K B)

	Abstract:Energy has always been an eternal topic of human development. Hydrogen energy has unparalleled advantages such as large reserves, high heating value, and zero pollution. It can well solve the urgent problems of human society\'s energy shortage and environmental pollution. The propylene separated from carbon pentanes in the chemical plant of this project is selected as the working fluid of the organic Rankine cycle, and the process model established by ASPE PLUS software simulates and optimizes the problem of low-temperature hydrogen recovery in the chemical plant. In this project, 4 heat exchangers, 2 pumps, and 2 steam turbines are used to exchange cold and heat energy with the river near the plant to recover the cold energy of hydrogen, and generate 14.48kW of electricity to drive the generator to rotate. It has guiding significance for the recovery of low temperature cold source and process optimization in chemical plants.
	TO cite this article:Cheng Chen,Shi Jianjun,Zu Runyin, et al. Recovery of excess cold energy from low-temperature hydrogen based on ASPEN PLUS two-stage Organic Rankine Cycling technology[OL].[ 7 September 2020] http://en.paper.edu.cn/en_releasepaper/content/4752771


	4. Self-assembled graphene films with various thicknesses as supercapacitor electrodes
	ZHU Jianbo,CHEN Wenjing,GUAN Sinan,ZHAO Xiayi,CHEN Xueye,ZU Jiasheng
	Chemical Engineering 03 June 2020
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (1190K B)

	Abstract:In this paper,Graphene have attracted considerable attention as the supercapacitor material due to its high electronic conductivity and large ion-accessible surface area. Herein, self-assembled reduced grapheneoxide (rGO) films with various controllable thicknesses and mass loadings are facilely prepared via a scalable vacuum filtration method. The rGO film electrodes with considerable mass loading of 6.7 mg cm-2 exhibit high specific capacitance of 173.4 F g-1 (1.16 F cm-2) at 1 A g-1 in 6 M KOH aqueous electrolyte, indicating the high utilization of the rGO active material. Moreover, quasi-solid supercapacitors fabricated with the rGO film electrode and PVA/KOH gel electrolyte shows a high capacitance of 1.03 F cm-2 and a large energy density of 0.073 mWh cm-2 at the power density of 3.3 mW cm-2, as well as excellent cycling stability of 85.6% retention after 10000 cycles. Such remarkable performance suggests that the rGO films are promising electrode materials for supercapacitor application.
	TO cite this article:ZHU Jianbo,CHEN Wenjing,GUAN Sinan, et al. Self-assembled graphene films with various thicknesses as supercapacitor electrodes[OL].[ 3 June 2020] http://en.paper.edu.cn/en_releasepaper/content/4752297


	5. Research on Reactor Design in Propane Dehydrogenation Process
	TANG Rongqing,YANG Manxia,YANG Lina,LIANG Tingting,JIN Mingxin
	Chemical Engineering 05 March 2020
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (962K B)

	Abstract:The success of chemical technology process development depends to a large extent on the control level and control ability of the temperature, concentration, residence time and temperature distribution of the fluid in the reactor, and the distribution of residence time. The research project of the propane dehydrogenation process is mainly based on the Catofin process, and the Catofin process is improved by combining the catalyst and operating conditions of the Oleflex process. The main reactors involved in this process are propane dehydrogenation reactors. This paper uses Aspen Plus, Comsol, SW6 and other computer software to select the structure of its core equipment, and details the manufacturing process of the reactor to determine the reaction The volume and approximate structure of the reactor achieve the control requirements of chemical process parameters such as temperature distribution, concentration distribution, and reaction time, so that product quality and performance can be guaranteed. Finally, the reactor design specification is listed in a table.
	TO cite this article:TANG Rongqing,YANG Manxia,YANG Lina, et al. Research on Reactor Design in Propane Dehydrogenation Process[OL].[ 5 March 2020] http://en.paper.edu.cn/en_releasepaper/content/4751033


	6. Study on Energy Integration and Heat Exchange Network Design Optimization of Vinyl Acetate Synthesis from Natural Gas Acetylene Process
	TANG Rongqing,ZENG Weizhao,YANG Manxia,YANG Lina,GAO Jianmin
	Chemical Engineering 29 February 2020
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (2116K B)

	Abstract:This research project uses acetylene and acetic acid as raw materials, zinc acetate-activated carbon as catalyst, and uses natural gas acetylene process to produce 330,000 tons every year of vinyl acetate products. In this paper, double-effect rectification technology and heat pump technology are used to design and optimize the system's energy integration and heat exchange network. Through the analysis of Aspen Energy Analyzer V10.0 software results, it is possible to find possible energy-saving measures to minimize industrial production costs. Double-effect distillation technology is used on the vinyl acetate distillation column, and the high-grade heat source at the top of the high-pressure distillation column is used to exchange heat with the re-boiling stream at the bottom of the atmospheric distillation column to save the amount of public works At the same time, the number of heat exchangers is reduced, thereby achieving the purpose of energy saving. The use of heat pump technology in the acetic acid distillation column to achieve the purpose of making full use of the energy at the top of the column, by changing the temperature of the steam to increase the possibility of heat exchange in the stream that could not be exchanged, thereby increasing the ratio of recoverable energy To achieve greater energy savings.
	TO cite this article:TANG Rongqing,ZENG Weizhao,YANG Manxia, et al. Study on Energy Integration and Heat Exchange Network Design Optimization of Vinyl Acetate Synthesis from Natural Gas Acetylene Process[OL].[29 February 2020] http://en.paper.edu.cn/en_releasepaper/content/4750979


	7. Synthesis of unsaturated cycloexanone formaldehyde resins and their UV-curing behavior with thiols
	Xu Peng,Li Chaofeng,Chang Xinwei,Zhang Yanwu
	Chemical Engineering 27 March 2019
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	Abstract:The water-soluble cyclohexanone formaldehyde resins (CFR) are synthesized using the rehydrated magnesium-aluminum hydrotalcite as the catalyst and double bonds are introduced by capping the chain ends with 5-norbornene-2,3-dicarboxylic anhydride. Through monitoring the conversion of double bonds with FT-IR, the UV-curing behavior of unsaturated CFR in the presence of pentaerythritol tetra (3-mercaptopropionate) is studied. The results show that the conversion of double bonds can reach to 64.1% at 0.66 mW/cm2 of UV light intensity when the molar ratio of double bonds to sulfhydryl groups is 1:1 in the presence of benzoin dimethyl ether (1% of molar amount of double bonds). The UV-curing kinetics conforms to the diffusion control model similar to the thermo-curing model of amine-epoxy.
	TO cite this article:Xu Peng,Li Chaofeng,Chang Xinwei, et al. Synthesis of unsaturated cycloexanone formaldehyde resins and their UV-curing behavior with thiols[OL].[27 March 2019] http://en.paper.edu.cn/en_releasepaper/content/4748131


	8. Kinetics of corrosive sulfur adsorption in transformer oil with Ag-Y, Ce-Y and Cu-Y zeolites
	Jun Hu,Deliang He,Tao wan,Huibin Lei,Yao Lu,Houqiang Huang
	Chemical Engineering 22 May 2018
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	Abstract:The Ag-Y, Ce-Y and Cu-Y zeolites were successfully prepared for removing corrosive sulfur from transformer insulating oil. The adsorptions and kinetics of corrosive sulfur on Ag-Y, Ce-Y and Cu-Y were studied, and activation energies (Ea) of adsorption processes were calculated. The results show that the desulfurization properties of these three adsorbents were Ag-Y > Ce-Y > Cu-Y, and 0.5wt% Ag-Y adsorption capacity of DBDS and NDM was up to 15.2mg/g and 18.8mg/g respectively. The kinetics for the adsorption process can be described by pseudo-second-order model and adsorption rate constants increase with an increase of temperature, indicating the endothermic nature of the adsorption. The adsorption process on Ag-Y was dominated by chemical adsorption, whereas the adsorption process on Ce-Y was dominated by physical adsorption, and the adsorption on Cu-Y was performed simultaneously by chemical and physical adsorption.
	TO cite this article:Jun Hu,Deliang He,Tao wan, et al. Kinetics of corrosive sulfur adsorption in transformer oil with Ag-Y, Ce-Y and Cu-Y zeolites[OL].[22 May 2018] http://en.paper.edu.cn/en_releasepaper/content/4745164


	9. Synthesis of comb-like macromolecules and their self-assembly behavior on silicon wafer
	LI Lina,HUANG Jiajia,ZHANG Yanwu
	Chemical Engineering 16 April 2018
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	Abstract:Construction of macromolecular topology and control of chain sequence are foundations to synthesize macromolecules with multifunction. Comb-like macromolecules have more designable freedoms because their back-bones and branched chains can be independently designed and synthesized. Herein, the rigid back-bones of comb-like macromolecules had been synthesized by ROMP of norbornene derivatives anchoring RAFT agent. The gradient polymer branched chains with controlled sequence structure was synthesized through a modified RAFT miniemulsion polymerization of 4-vinylpridiene (4VP) and t-butyl acrylate (tBA) in a semi-batch manner. These comb-like macromolecules can self-assembly into arrays due to the stiffness of backbone when dilute solution of comb-like macromolecules are brushed onto silicon surface. The size of arrays is affected by molecular weight and sequence structure of branched chains. The effect of these arrays on water contact angle of silicon is studied also.
	TO cite this article:LI Lina,HUANG Jiajia,ZHANG Yanwu. Synthesis of comb-like macromolecules and their self-assembly behavior on silicon wafer[OL].[16 April 2018] http://en.paper.edu.cn/en_releasepaper/content/4744582


	10. Manufacture of 2-Methylenglutaronitrile from Acrylonitrile Dimerization in an IonicLiquid Medium
	Shi Yunhai,Wei Qing,Peng Siyao,Wang YiYuan,Wei Juan,Yang Zuoguo
	Chemical Engineering 04 December 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (246K B)

	Abstract:Manufacture of 2-methylenglutaronitrile (MGN) from acrylonitrile dimerization with two kinds of imidazolium ionic liquids, i.e., [Bmim]Cl and [Emim]BF4, was studied in this paper. The influences of reaction temperature, reaction time, the amount of catalyst and that of ionic liquid on the yield of MGN were investigated by the method of single-factor experiment. The results illustrared that the yield of MGN with [Emim]BF4 ionic liquid is higher than that with [Bmin]Cl. The ionic liquids can be recycled for 4 runs by extraction with toluene and no significant catalytic activity loss was observed. An orthogonal experimental table with the five-factor and four-level, denoted as L16(45), was designed for optimizing the operation conditions of MGN synthesis. The optimal results illustrated that the maximum yield of MGN could rise above 90.5% under the conditions of 50 C, 24h, 2.0g catalyst and 5.0g ionic liquid, which is higher than that of the literatures reported.
	TO cite this article:Shi Yunhai,Wei Qing,Peng Siyao, et al. Manufacture of 2-Methylenglutaronitrile from Acrylonitrile Dimerization in an IonicLiquid Medium[OL].[ 4 December 2017] http://en.paper.edu.cn/en_releasepaper/content/4742552

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