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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
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	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
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	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


	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
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	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
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	Abstract:In this paper,Graphene have attracted considerable attention as the

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