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
2022 Vol.39 Issue.3,
Published 2022-05-15
0
2022 Vol. 39 (3): 0-0 [
Abstract
] (
251
) [
HTML
1KB] [
PDF
802KB] (
1484
)
1
Research progress on viscosity reduction mechanism of heavy oil and synthetic method of viscosity reducer
WANG Chenhui, XU Jipeng, ZHANG Houjun, HAN You
In recent years, China’s economy and industry have developed rapidly, which has led to an increase in energy consumption year by year. As an important strategic reserve energy, heavy oil in unconventional crude oil is particularly important for its reasonable and efficient exploitation. Adopting appropriate methods to reduce the viscosity of heavy oil is of great significance to improve the recovery of heavy oil and the efficiency of pipeline transportation. The development of viscosity reducers for heavy oil has also become the current research focus. This article reviews the research progress of the viscous mechanism of heavy oil, the synthesis methods of various viscosity reducers and their viscosity reduction mechanism at home and abroad, points out the shortcomings of the current research on viscosity reducers, and makes a prospect for its research direction.
2022 Vol. 39 (3): 1-17 [
Abstract
] (
279
) [
HTML
1KB] [
PDF
3773KB] (
1314
)
18
One-step oxidation of benzene to
p
-benzoquinone by highly efficient copper-based MOF
HOU Wei, ZENG Aiwu
In this work, the copper-based metal organic framework material HKUST-1 was successfully synthesized by solvothermal method, vigilantly investigated using various techniques including XRD, SEM, FTIR, XPS, TG and BET. The prepared HKUST-1 was applied as a heterogeneous catalyst in oxidation of benzene to
p
-benzoquinone, and the influence of various reaction conditions such as role of solvents, reaction time and temperature, benzene to hydrogen peroxide molar ratio were specifically investigated. The acquired date manifested that HKUST-1 had shown superiority catalytic performance. Experimental results show that under optimized conditions, 11.96% yield of
p
-benzoquinone is obtained with the selectivity as high as 64.61%. In addition, the catalyst recovery and reuse test show that HKUST-1 is able to endure the harsh conditions of benzene oxidation for four runs. After the catalyst was recycled 4 times, the yield of
p
-benzoquinone remained above 10.87%.
2022 Vol. 39 (3): 18-25 [
Abstract
] (
311
) [
HTML
1KB] [
PDF
9577KB] (
1802
)
26
Preparation and characterization of tetraphenylethylene derivative as room temperature liquid crystalline luminescent material
ZENG Yuting, ZHANG Yanfang, HUANG Hanjun, LU Lin, REN Xiangkui
Luminescent liquid crystals have attracted great attentions as potential functional materials due to their unique luminescence properties and liquid crystal ordering. In this work, a novel tetraphenylethylene derivative(TPE-Chol) with liquid crystalline structure and aggregation-induced emission property was prepared by ionic self-assembly. The photophysical properties and liquid crystalline structure of the complex were investigated by absorption spectra, emission spectra and X-ray diffraction. The experimental results show that the TPE-Chol has the typical aggregation-induced emission property and liquid crystalline phase at room temperature. Therefore, TPE-Chol is a new material with potential application in liquid crystal display and other fields.
2022 Vol. 39 (3): 26-32 [
Abstract
] (
229
) [
HTML
1KB] [
PDF
3703KB] (
774
)
33
Cooling crystallization process of ammonium persulfate
ZHANG Yulong, GUO Shengzheng, ZHAO Jianwei, ZHANG Junjie, GONG Junbo
In industry, ammonium persulfate was usually separated from the electrolyte of ammonium sulfate. This work is aiming at providing thermodynamic and dynamic data for the crystallization of ammonium persulfate in ammonium sulfate aqueous solution. Ternary phase diagrams of (NH
4
)
2
S
2
O
8
-(NH
4
)
2
SO
4
-H
2
O at different temperatures were firstly determined with isothermal solubility method, providing a thermodynamic basis for the optimization of the cooling crystallization of ammonium persulfate. In addition, laser method was applied to determine the supersolubility and the effects of cooling rate and stirring rate on the metastable zone widths of (NH
4
)
2
S
2
O
8
were investigated, the nucleation kinetic parameters were calculated using the Self-consistent Nyvlt-like equation. Induction time of (NH
4
)
2
S
2
O
8
nucleation in pure water at different temperatures were also measured to analyze the correlation of induction period and the supersaturation.
2022 Vol. 39 (3): 33-41 [
Abstract
] (
232
) [
HTML
1KB] [
PDF
2341KB] (
1042
)
42
Kinetics of reaction crystallization of cerium oxalate decahydrate in continuous crystallizer
XIE Fei, HUANG Yunhai, WU Dehui, HOU Xuefeng, YUAN Siwen, ZHOU Guanchen, YANG Jinyue, TIAN Beiqian, HAO Hongxun
The kinetics of continuous reaction crystallization of cerium oxalate decahydrate in a mixed suspension-mixed product-removal (MSMPR) crystallizer was studied using the continuous steady state method. Based on the grain size independent growth rate model, the obtained particle population density distribution data were used to determine the nucleation kinetic equation and growth kinetic equation of cerium oxalate decahydrate under different experimental conditions by regression. The index of the nucleation and growth rate of cerium oxalate decahydrate crystal relative to the supersaturation is calculated to be 4.211 and 0.752, respectively. Theoretical analysis of the equations showed that low supersaturation was beneficial to the preparation of cerium oxalate decahydrate crystals with larger average particle size. The kinetic study of cerium oxalate decahydrate crystal would provide important kinetic data for its large-scale industrial production.
2022 Vol. 39 (3): 42-48 [
Abstract
] (
231
) [
HTML
1KB] [
PDF
3844KB] (
1054
)
49
Study on particle collision behavior in a liquid-solid down-flow circulating fluidized bed
JIANG Feng, LIU Yi, QI Guopeng, LI Xiulun
A cold-model liquid-solid down-flow circulating fluidized bed evaporator is designed and built. The effect of the axial position and operating parameters on the particle-to-wall collision behavior is investigated to reveal the heat transfer enhancement and fouling prevention mechanism. Water and different sizes of polyformaldehyde particles and glass beads are selected as the working media in the experiments. The collision acceleration signals are dealt with the frequency and time domains analyses such as the power spectral density, kurtosis and standard deviation under different operating parameters including the amount of added particles (0—2.0%) and circulation flow rate (2.15—5.16 m
3
·h
-1
). The results show that the frequency range of the collision acceleration signals are from 0 to 2 000 Hz and 6 000 to 16 000 Hz for the liquid and solid phases, respectively. The standard deviation of the particle-to-wall collision acceleration signals initially decreases and then increases along the axial direction of the down-flow bed from the top to the bottom; however, the kurtosis increases. The standard deviation increases, but the kurtosis decreases with the increases of the amount of added particles and circulation flow rate. The standard deviation of the polyformaldehyde particles initially decreases and then increases with the increase of particle size at low amount of added particles; however, the kurtosis obviously increases. The standard deviation and kurtosis of the polyformaldehyde particles increase with the increase of particle size at high amount of added particles, but the amplitude of the increase in kurtosis is small. The standard deviation of the glass bead is small, but the kurtosis is obviously higher than that of the polyformaldehyde particles. The three-dimensional diagrams are established to reflect the effect of the operating parameters on the particle collision behavior. The findings are beneficial to promoting the industrial application of the fluidized bed heat transfer and fouling prevention technology.
2022 Vol. 39 (3): 49-59 [
Abstract
] (
229
) [
HTML
1KB] [
PDF
6294KB] (
845
)
60
Research progress in conversion to light aromatics and separation of heavy aromatics
YUAN Guomin, CONG Haifeng, LI Xingang
With the construction and expansion of a large number of aromatics complexes, ethylene plants, and the development of the modern coal chemical industry, the sources of heavy aromatics have become more diversified, and the by-products of heavy aromatics have become more and more effective. While this resource will greatly promote the development of the chemical industry, it is of great significance in promoting the country’s economic and energy development. This article mainly summarizes the technology of lightening heavy aromatics and separation of heavy aromatics in recent years, expounds the utilization status of petroleum-based and coal-based heavy aromatics. And focusing on several mature heavy aromatics lightening and separation processes, For example, lightening processes such as dealkylation, selective hydrogenation, ring opening, and transalkylation, extractive distillation, alkylation reaction rectification, adsorption separation of heavy aromatics separation processes. Although both heavy aromatics separation and lightening processes can improve the utilization and the added value of heavy aromatics resources, there are many problems, such as low conversion rate, more by-products, and low catalyst efficiency in the lightening process. And the heavy aromatics separation process has problems such as high energy consumption for separation, large equipment investment, difficult selection of extractive distillation solvents, and low yield of crystallization separation. Therefore, the two kind of reuse methods for heavy aromatics need to be improved and innovated in the process. Therefore, at the end of this article, a prospect is given to the lightening and separation process of heavy aromatics resources, which provides a reference for in-depth research on the reuse of heavy aromatics resources.
2022 Vol. 39 (3): 60-72 [
Abstract
] (
320
) [
HTML
1KB] [
PDF
1753KB] (
1916
)
73
Development and evaluation of high-temperature loss circulation spacer fluid
LU Feifei, YI Hao, XUE Zhaofeng, GUO Jintang
There are a lot of safety and engineering problems about loss and leakage during well cementation on deep layer and high-temperature district. To solve this, we developed a kind of high-temperature plugging spacer fluid that is of great rheological properties, highly stable and covering a wide range of density. To add rigid bridging materials and lignin fibre cooperating with deformable polymer micelles, efficient plugging on layer cracks has been achieved. A polymer plugging agent matched spacer fluid was synthesized through free radical aqueous solution copolymerization with the monomers of 2-acrylamido-2-methyl-propane sulphonic acid (AMPS) and acrylamide(AM). The structure of the polymer was identified by FTIR analysis. With the ratio of 1% lignin fiber+2% polymer+1% walnut shell which mesh number is 18, the plugging agent successfully made the loss circulation spacer fluid seal the crack under 5 MPa at least. It proves that density contrast between different depth is no more than 0.01 g·cm
-3
upon 160 ℃, and the sealing pressure reaches 5 MPa at least. The spacer has great stability under high temperature and rheological properties through comprehensive evaluation test. Its compatibility with cement slurry was identified ideally by tests of rheological properties, thickening time and fluid loss, showing that the spacer fluid will not influence cement slurry pumping and fluid loss ability and will not shorten cementitious time badly.
2022 Vol. 39 (3): 73-79 [
Abstract
] (
219
) [
HTML
1KB] [
PDF
2835KB] (
899
)
80
Preparation of MOF-derived NiCoP/C@NiMn-LDH composite and its electrochemical properties
ZHU Manlin, CAI Wangfeng, WANG Yan
To improve the electrochemical performance of electrode materials for supercapacitors, the core-shell NiCoP/C@NiMn-LDH composite were synthesized on Nickel Foam(NF) with MOF-derived NiCoP/C as the conductive skeleton and decorated by ultra-thin NiCo-LDH nanosheets. The results show that NiCoP/C@NiMn-LDH electrode exhibits an excellent specific capacitance of 2 278.0 F·g
-1
at 1 A·g
-1
and remarkable cycling stability of 93.7% capacitance retention after 2 000 cycles. It is concluded that the high specific area of MOF template, the core-shell structure and the synergy between NiCoP/C and NiMn-LDH contribute to the electrochemical performance.
2022 Vol. 39 (3): 80-88 [
Abstract
] (
242
) [
HTML
1KB] [
PDF
6807KB] (
1048
)
89
Numerical simulation on the effect of
n
(Cu)/
n
(Ni) ratio in solid oxide fuel cell Cu/Ni-LSCM anode on carbon deposition
WANG Bin, YU Jie, KANG Dingwen, LIU Hui, QIAO Cui, LYU Guoqiang, MA Wenhui
When the solid oxide fuel cell (SOFC) uses hydrocarbons as fuel, the porous anode is prone to serious carbon deposition, resulting in the decrease of anode catalytic activity, the decrease of cell power density and the sharp attenuation of cell life. Lanthanum chromate-based perovskite materials have good stability, electrocatalytic activity and carbon deposition resistance under high temperature oxidation and reduction atmosphere. A kinetic model of dry reforming of methane and carbon dioxide in LSCM and Cu/Ni-LSCM was established, which coupled momentum transfer, mass transfer, chemical reaction kinetics, domain differential equation and gas mass transfer model in porous media. The carbon deposition resistance, catalytic activity and porosity of Cu/Ni-LSCM anode materials were studied using the model. It is concluded that the introduction of Cu can significantly reduce the carbon deposition rate and increase the fuel conversion rate on a certain basis. The thermal decomposition of methane is the main cause of carbon deposition. At the same time, the simulation results show that the anode fuel inlet is the most serious carbon deposition area.
2022 Vol. 39 (3): 89-97 [
Abstract
] (
229
) [
HTML
1KB] [
PDF
6258KB] (
1048
)
98
Study of multi-physical field characteristics in a microwave reactor with an interlayer and a stirring blade
ZOU Pengcheng, JIN Guangyuan, CUI Zhengwei, NIE Guoyu, HAN Taibai, ZHU Yulian
Microwave heating chemical reaction is fast and efficient, so microwave reactors are used in auxiliary chemical production. However, uneven heating is the main problem of microwave heating chemical reaction. Therefore, a fluid stirring paddle was introduced into a microwave reactor with an interlayer. The multi-physics coupling calculation of the Maxwell equation, heat transfer equation and flow equation was carried out using COMSOL software, and the influence of material dielectric properties, microwave power and stirring paddle parameters on microwave heating characteristics were discussed. The study found that: (1) When the relative dielectric constant of the material is between (2.16-0.28
j
) and (2.73-0.13
j
), the microwave heating uniformity is better; (2) After heating 2 seconds, the uniformity of microwave heating shows regular changes; (3) With the increase of microwave power, the material temperature rises faster under the same heating time, but the stirring power consumption is also higher; (4) The larger the impeller diameter and stirring speed, the lower the temperature variation coefficient of the material, and the better the microwave heating uniformity; The coefficient of variation first decreases and then increases with the increase of the bottom clearance, and the power consumption decreases linearly with the increase of the bottom clearance; (5) The significance of the stirring blade parameters influence on power consumption and coefficient of variation is: stirring speed > impeller diameter > bottom clearance.
2022 Vol. 39 (3): 98-106 [
Abstract
] (
219
) [
HTML
1KB] [
PDF
10226KB] (
1023
)
107
Crystal morphology of
ε
-CL-20 in binary solvents: Molecular dynamics study
ZHAO Yanpeng, WEI Hongyuan, DANG Leping
In this work, the effect of ethyl acetate/dibromomethane binary solvent systems on
ε
-CL-20 crystal morphology was studied by the molecular dynamics simulative. The solvent-crystal interaction was considered by the modified attachment energy (MAE) model, the modified
ε
-CL-20 crystal morphologies in ethyl acetate/dibromomethane mixed solvents with different compositions were predicted by molecular dynamics simulation, the simulation morphologies are compared with the experimental results. The results demonstrate that the
ε
-CL-20 morphology derived from the simulation is well in accordance with that observed in experiments, and the solvent-crystal interaction is positively related to the surface roughness. Moreover, the diffusion coefficients of solvent molecules in different crystal planes were analyzed by mean square displacement (MSD), and the influence of solvent diffusion rate on different crystal planes was studied. The composition of interaction between solvent molecules and crystal molecules was analyzed by radial distribution function (RDF).
2022 Vol. 39 (3): 107-116 [
Abstract
] (
242
) [
HTML
1KB] [
PDF
5500KB] (
1041
)
117
Stress and deformation analysis of rectangular tank with optimal reinforcement arrangement
ZHANG Shuai, LI Qingsheng
For the problems caused by the bulky rectangular tank and unreasonable layout design of reinforced structure in engineering, the stress and deformation of rectangular tank are analyzed under static pressure condition by ANSYS APDL. In this paper, six factors and five levels orthogonal test scheme is adopted, in which the maximum primary stress
S
1max
, maximum equivalent stress
S
2max
and maximum deformation
Δ
max
of rectangular tank are taken as test indexes, meanwhile, the spacing
A
, width
B
and thickness
C
of side wall reinforcing iron, and the spacing
D
, width
E
and thickness
F
of end wall reinforcing iron are taken as test factors, and the optimal reinforcement arrangement scheme
A
4
B
5
C
5
D
2
E
5
F
2
is obtained by combining with matrix analysis method, and is optimized by ANSYS first-order optimization algorithm. The results show that the weight of the rectangular tank is reduced by 27% after adopting the optimal reinforcement arrangement. Finally, the limit load analysis method is used to verify the test condition of
P
T=0.1 MPa.
2022 Vol. 39 (3): 117-126 [
Abstract
] (
201
) [
HTML
1KB] [
PDF
8948KB] (
903
)
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
