关闭×
化学工业与工程
Home
|
|
About Journal
|
Editorial Board
|
Instruction
|
Subscriptions
|
Download
|
Publication Ethics
|
Contacts Us
|
Chinese
化学工业与工程
Office
Author Center
Peer Review
Editor Work
Office Work
Editor-in-chief
Journal
Current Issue
Next Issue
Archive
Advanced Search
Read Articles
Download Articles
Email Alert
Current Issue
2018 Vol.35 Issue.5,
Published 2018-09-15
0
2018 Vol. 35 (5): 0-0 [
Abstract
] (
401
) [
HTML
1KB] [
PDF
389KB] (
831
)
1
Oxalates Pyrolysis Synthesis of Composite Oxide CoCeZrO for CO Preferential Oxidation in H
2
-Rich Gases
Gao Wanxian, Li Xingang, Tian Ye
There are very few reports about Co-based catalysts for the CO-PROX in H
2
-rich stream. To solve this problem, we developed CoCe catalyst system synthesized by oxalates pyrolysis method and studied the effect of different zirconium contents on catalytic performance of CO-PROX. When the molar ratio of zirconium to ceria is 3:20, the sample exhibits the best catalytic activity, which can achieve 100% CO conversion as low as 110℃ and keep 100% O
2
to CO
2
selectivity below 100℃. The BET results indicate that the sample possesses the largest specific surface area 110 m
2
/g. TEM and XRD results show that CoCeZr15 sample has the greatest crystallinity of Co
3
O
4
. H
2
-TPR results suggest that the sample has excellent redox ability. All these factors above are beneficial to improving catalytic activity.
2018 Vol. 35 (5): 1-6 [
Abstract
] (
1707
) [
HTML
1KB] [
PDF
1795KB] (
936
)
7
Synthesis of 2, 5-Dichloro-N-[2-(Isopropylsulfonyl) Phenyl]-Pyrimidin-4-Amine
Chen Yalin, Li Wei, Zhou Xueqin, Wang Tianyang, Liu Dongzhi
2,5-Dichloro-N-(2-(isopropylsulfonyl) phenyl)-pyrimidin-4-amine was synthesized from 1-(isopropylsulfonyl)-2-nitrobenzene by reaction of reduction and nucleophilic substitution. The target compounds with high purity and high yield were obtained by optimizing the reaction conditions. The structure of the resulting product was confirmed by
1
H-NMR and MS. The process exhibited short reaction time, low cost, high yield, and to a certain extent, in line with the requirements of industrial production.
2018 Vol. 35 (5): 7-11 [
Abstract
] (
3909
) [
HTML
1KB] [
PDF
917KB] (
976
)
12
Synthesis of Isophorone from Acetone over CsX Molecular Sieves
Ma Li, Jiang Bin, Ren Hailun
The modified X molecular sieves were prepared by the ion-exchange method and the impregnation method, named as CsX-IE and CsX-IMP respectively. The characterization of CsX-IE and CsX-IMP were carried out by the use of SEM, XRD, FT-IR, BET, TG and CO
2
-TPD techniques. The catalytic performance, including the catalytic activity, selectivity and stability, were evaluated in the reaction of the acetone vapor-solid phase condensation using a micro fixed-bed reactor. Characterization results show that CsX-IE and CsX-IMP molecular sieves catalysts both have the complete crystal structure, large surface area, the proper basic site and good thermal stability. The conditions on preparation of isophorone by condensation of acetone via modified molecular sieves catalysts were studied. The results show that the optimum reaction temperature is 350℃, and the best LHSV of acetone is 2.0 h
-1
. Under this conditions, the acetone conversion rate can reach 26.05%, the selectivity of isophorone is 52.27%.
2018 Vol. 35 (5): 12-18 [
Abstract
] (
1079
) [
HTML
1KB] [
PDF
2141KB] (
2742
)
19
Preparation and Performance of KOH Activated Graphite Felt Anode for Electrolytic Regeneration of PCB Etchant
Wang Chunzhen, Zhang Wen, Wang Yuxin
The wettability and electrochemical activity of the graphite felt (GF) have a significant impact on the performance of the apparatus for electrolytic regeneration of PCB etchant. GF activated with KOH at 900℃ is employed as the anode of the cell for electrolytic regeneration of acidic CuCl
2
etchant. The morphology and the element composition of activated GF and untreated GF are characterized by SEM and XPS, respectively. The electrochemical performance of the two GF electrodes is evaluated through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results show that the oxygen content of the activated GF increases to 6.27at% from 2.60at% of the untreated GF, and the wettability is improved. The electrochemical activity towards oxidation of Cu (I) is improved, which can be ascribed to the increase of the number of the defective carbon. The BET specific surface of the GF increases by~42 times after KOH activation. The anode potential and the cell voltage of the activated GF decreases by 0.10 V and 0.05~0.06 V,respectively,compared with the untreated GF in the etchant electrolytic regeneration experiment.
2018 Vol. 35 (5): 19-27 [
Abstract
] (
3307
) [
HTML
1KB] [
PDF
2174KB] (
1078
)
28
Study of Si/p-PANI Anode Materials for Lithium Ion Batteries
Liu Yuanyuan, Xie Haimei, Kang Yilan, Li Xianggao, Tian Jianhua
Si and pyrolized PANI composites (Si/p-PANI) used as anode materials for lithium ion batteries, were prepared by ball-milling and high temperature pyrolysis at different temperatures,using nano-silicon as raw material and polyaniline (PANI) as carbon source. The structure, morphology and electrochemical properties of the Si/PANI and Si/p-PANI composites were characterized by XRD, SEM, TEM, FTIR, XPS, constant current charge-discharge and cyclic voltammetry (CV) methods. The results show that Si/p-PANI composites can prevent the agglomeration of nano-silicon particles and form a good conductive network. Si/p-PANI composite pyrolized at 700℃ exhibits a reversible capacity of 1 051.1 mAh·g
-1
after 50 cycles at a current density of 400 mA·g
-1
and has the best electrochemical properties.
2018 Vol. 35 (5): 28-34 [
Abstract
] (
3281
) [
HTML
1KB] [
PDF
2445KB] (
1243
)
35
Impact of Molecular Sieve SBA-15 on the Electrochemical Performance of Lithium Sulfur Batteries
Li Xia, Tian Jianhua, Shan Zhongqiang
In order to solve the main problems existed in the lithium sulfur battery, a certain amount of mesoporous molecular sieve SBA-15 was added into the sulfur electrode. The physical structures of SBA-15 were determined by scanning electron microscopy, transmission electron microscopy and nitrogen adsorption methods, the electrochemical performance of cells were characterized by cycling tests. The results indicate that the cell with 1% SBA-15 (SCS-1.0) shows excellent electrochemical performance, the specific discharge capacity of SCS-1.0 cell was 200 mAh·g
-1
higher than that of SC cell at the 300th cycle. So the addition of 1% SBA-15 is beneficial to improve the electrochemical performance of lithium sulfur batteries.
2018 Vol. 35 (5): 35-41 [
Abstract
] (
4895
) [
HTML
1KB] [
PDF
2294KB] (
1391
)
42
Design and Performance Tests of Motor-Driven Rotary Energy Recovery Device
Wu Jianeng, Wang Yue, Xu Enle, Duan Yawei, Zhou Jie, Xu Shichang
Rotary energy recovery device(RERD), as the energy saving equipment of seawater desalination system, has a great significance on reducing the power consumption and permeate cost of the system. In this paper, a new motor-driven RERD was designed and manufactured, and a complete SWRO desalination system was also established in order to evaluate the performances of the device. When the RERD can satisfy well the requirement of industrial application, we made a on-site testing about performances of RERD coupled with SWRO system. The experimental results show that at the operating condition of RERD capacity 13 m
3
/h, the rotating speed 500 r/min and the working pressure 6.0 MPa, the leakage of the device is about 0.57 m
3
/h and energy recovery efficiency of the device can reach 91.2%. When the operating capacity of the RERD is increased to 16 m
3
/h, the flows and pressures of the fluids in and out of the device almost keep constant, the energy recovery efficiency is slightly increased to about 92.5%.
2018 Vol. 35 (5): 42-48 [
Abstract
] (
1026
) [
HTML
1KB] [
PDF
1827KB] (
924
)
49
Extractive Distillation of Ethanol-Ethyl Propionate Azeotrope with Para-Xylene
Zhou Hang, Ding Hui, Quan Jianbo
Para-Xylene was selected as a proper extractant through COSMO-SAC model to separate ethanol-ethyl propionate azeotrope, and its effect was verified by vapor-liquid equilibrium experiment. The results show that para-xylene can separate ethanol-ethyl propionate azeotrope. The process of continuous extractive distillation for the ternary system of ethanol+ethyl propionate+para-xylene was simulated by Aspen Plus, and the proper process parameters were obtained:in extractive distillation column, ideal stage number is 60, number of feed stage is 50, number of solvent stage is 25, reflux ratio is 7 and ratio of solvent to feed is 0.8; in solvent recovery column, ideal stage number is 30, number of feed stage is 11, reflux ratio is 6. Under the optimized parameters, mole fraction of ethanol and ethyl propionate can reach 99.85% and 99.0%, respectively.
2018 Vol. 35 (5): 49-55 [
Abstract
] (
1324
) [
HTML
1KB] [
PDF
2045KB] (
1163
)
56
Design of Multi-Effect Batch Distillation Column
Wang Hongwei, Kong Wangxin, Shangguan Guangjin, Jian Chungui, Jian Jie, Zhang Xuemei
To develop a feasible design method for a multi-effect batch distillation column (MEBAD), constant holdup model was built and the coefficient of approaching equilibrium was used to examine the degree of approaching equilibrium under total reflux for MEBAD. On the basis of comprehensive consideration of the number of stages and operation time required, the criterion for the end of total reflux operation in design was proposed. Finally, the design method for the emerging column was given, which could fulfill the separation task perfectly.
2018 Vol. 35 (5): 56-61 [
Abstract
] (
433
) [
HTML
1KB] [
PDF
1521KB] (
1028
)
62
A Mathematical Model for a Soluble Lead-Acid Battery
Peng Cheng, Huang Chengde, Wang Yuxin
The soluble lead-acid battery is a redox flow cell that uses a single reservoir to store the electrolyte and does not require a microporous separator or membrane, allowing a simpler design and a substantical reduction in cost. In this paper, a two-dimensional transient model for a soluble lead-acid flow battery is developed. The model based on a comprehensive description of mass, charge, energy and momentum transport and conservation, and is combined with a global kinetic model for reactions involving lead species. The influences of the electrode gap, electrode shape, applied current density, operating temperature; inlet electrolyte velocity and initial concentration of species on the charge/discharge behavior of the cell are investigated. The results show that compared with the plate eleoctrode, the camber electrode makes the voltage during charging risen remarkably. Among various conditions that affect the performance of the soluble lead-acid flow battery, operating temperature and current density may be the keys in optimizing a lead-acid flow battery.
2018 Vol. 35 (5): 62-71 [
Abstract
] (
2395
) [
HTML
1KB] [
PDF
2889KB] (
888
)
72
Simulation of Four-Product Dividing Wall Columns for the Separation of Trichlorosilane
Wang Suxian, He Yinfeng, Gao Yali, Wang Yan, Zhu Huaigong
Two four-product dividing wall columns, Kaibel Dividing Wall Column (Kaibel DWC) and fully thermally coupled Dividing Wall Column(4-DWC), were proposed as innovation process to separate trichlorosilane from reduction plant in polycrystalline silicon system. Using commercial software packages of Aspen Plus, Kaibel DWC and 4-DWC can be simulated by employing corresponding thermodynamically equivalent sequences of simple columns. Based on reliable estimates by the short-cut method, the rigorous steady-state simulation of the Kaibel DWC was obtained. The structure parameters and the operation parameters were optimized. The simulation results indicated that compared with the conventional configuration for the Kaibel DWC and 4-DWC, the energy saving were 26.43% and 36%, respectively, and the equipment investment was reduced.
2018 Vol. 35 (5): 72-79 [
Abstract
] (
1040
) [
HTML
1KB] [
PDF
2892KB] (
775
)
News
More
·
《化学工业与工程》入编2020年版《中文核心期刊要目总览》
·
·
《化学工业与工程》创刊30周年庆
·
·
2012年第4期目录
·
2012年第3期目录
·
·
Links
More
·
www.ccs.ac.cn
·
www.tju.edu.cn
Copyright ©2020 Chemical Industry and Engineering, all rights reserved.
Tianjin University 50A305, No.135 Yaguan Road, Haihe Education Park, Tianjin 300350, China
Tel: 86-22-27406054; E-mail:
hgbjb@tju.edu.cn
Support by
Beijing Magtech Co.Ltd
, E-mail:
support@magtech.com.cn
