CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Ming-Tao He,Peng Li,Yin-Hao Wang,Lei Du,Song Huang,Hai-Kui Zou,Guang-Wen Chu,Bao-Chang Sun
In this work, the synthesis of bisphenol S (4,4′-BPS) using reactive dehydration in a rotating packed bed (RPB) was studied. Firstly, orthogonal experiments were adopted to investigate the effects of different operating conditions on the yield and content of 4,4′-BPS in a stirred tank reactor (STR), including the mesitylene/phenol molar ratio ( μ ), reflux dehydration time ( t ), and stirring speed ( n ), in order to optimize the operating conditions in STR. Based on the study in STR, the effects of operating conditions, including rotation speed ( N ), feeding rate ( q ), and cycle number ( τ ), on the yield and content of 4,4′-BPS in RPB combined with STR (RPB-STR) were further investigated to optimize the operating conditions. The results indicated that compared to STR, the yield and content of 4,4′-BPS increased by 22.1% and 7.52% under the optimal operating conditions in RPB-STR, respectively. This work provides a novel route for efficient synthesizing 4,4′-BPS.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Progress & Sustainable Energy
·
2012
·Vol. 32
·期 3
·564-568
·
IF 1.649
Wei-guo Pan,Rui-tang Guo,Xiao-bo Zhang,Jian-xing Ren,Qiang Jin,Hong-jian Xu
The absorption process of NO into KMnO 4 /(NH 4 ) 2 CO 3 solutions was studied in a stirred tank reactor. The experimental results showed that the reaction process was a fast pseudo-m reaction. The reaction between NO and aqueous solutions of KMnO 4 /(NH 4 ) 2 CO 3 was found to be first-order with respect to NO and with respect to KMnO 4 . The frequency factor and the average activation energy of this reaction were 2.3 × 10 9 m 3 /(mol s) and 36.77 kJ/mol, respectively. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 564–568, 2013
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2017
·
IF 2.905
Mingguang Zhang,Lei Ni,Juncheng Jiang,Wenxing Zhang
This research deals with the thermal runaway and shortstopping of esterification process in batch stirred reactors. A series of experiments were carried out with RC1e, and an autocatalytic kinetic model of esterification process was established. The divergence criterion (DIV) which describes the trace of Jacobian matrix of temperature and reactant conversion was used to identify the thermal runaway boundary of esterification. Computational fluid dynamics (CFD) simulation was employed to illustrate the temperature distribution inside the reactor. The cooling temperature and agitation speed significantly affect the esterification runaway. CFD simulation of shortstopping runaway in esterification process with cooling diluent injection was established to study the effect of addition location and quantity of the cold diluent on shortstopping performance.
研究领域:
化学工程
·
反应动力学
·
过程安全
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Xiuxin Du,Xiaoxia Duan,Chao Yang
A novel experiment is designed to visually study the interphase mass transfer in an immiscible liquid–liquid system using the planar laser-induced fluorescence method combined with the refractive index matching technique. Rhodamine B is chosen as the fluorescence tracer because it can dissolve in both aqueous and organic phases. The experimental results indicate that the mass transfer equilibrium time is negatively correlated to the agitation speed. For the Rushton disk turbine, the interphase mass transfer efficiency is enhanced as the impeller clearance increases from T/10 to 2T/5. Furthermore, the interphase mass transfer process is dampened and the equilibrium time increases continuously when the volume fraction of NaI solution increases from 2 to 50%. When the impeller eccentricity increases, the mass transfer equilibrium time increases correspondingly and the trend of its change in the immiscible liquid–liquid system is contrary to that of mixing time in the single phase.
研究领域:
化学工程
·
流体力学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Bing Liu,Kun Dong,Ru-Jia Chen,Song-Tao Chang,Guang-Wen Chu,Liang-Liang Zhang,Hai-Kui Zou,Bao-Chang Sun
This work presents the study on solid–liquid mass-transfer performance of suspension in a rotating packed bed (RPB). The calculation model of solid–liquid mass-transfer coefficient (kS) is deduced on the basis of the mass conversation law. The kS in RPB is measured using the suspension of cation-exchange resin particle reaction with NaOH solution. The effects of different operating conditions such as the dispersion time (t) in a stirred tank reactor (STR), the rotating speed (N), the mesh packing thickness (w), the liquid volume flow rate (LT), and the solid loading (e) on the RPB are investigated. The results show that kS increases with the increase of N and w; it increases first and then tends to remain constant with the increase of t and LT. However, e has little influence on kS. A nondimensional equation for Sh is established, and the predicted and experimental values of Sh are in good agreement with a deviation within ±15%. Furthermore, the maximum value of Sh of 124 is obtained under the conditions, t = 0.5 h in STR, N = 2200 rpm, LT = 56 L/h, e = 15 g/L, and w = 24 mm, which is higher than those in the microreactor (MR) and STR. Here, RPB exhibits great application potential in the solid–liquid mass-transfer or reaction process.
研究领域:
化学工程
·
传质与反应工程
✓ 已验证
产品关联
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2025
·
IF 2.7
Litao Chen,Jiansheng Luo,Pengcheng Jing,Wang Ma,Hongtao Liu,Changhong Yu
Equilibrium data, one of the essential fundamental data of gas hydrate, is always needed in its prevention and utilization. In this work, a total of 111 sets of hydrate equilibrium data for CO 2 -containing natural gas in alcohol/salt solutions were measured in a stirred autoclave or rocking cell by using the isochoric pressure searching method. Some equilibrium data failed in the thermodynamic consistency test. It is speculated, after the hydrate formation and dissociation in the insufficiently stirred autoclave, the last hydrate crystal could be in equilibrium with concentrated or diluted solutions which are different from the initial solution. Fake equilibrium data could be reported. The gas hydrate equilibrium data in some solutions were remeasured in a rocking cell apparatus. All the rocking cell measured equilibrium data passed the thermodynamic consistency test. It seems stirred autoclave are likely to report fake gas hydrate equilibrium data, while rocking cell may be more reliable.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Flow Chemistry
·
2020
·Vol. 10
·期 4
·605-613
·
IF 3.622
Zhu Zhihao,Kang Guodong,Yu Sha,Qin Yitian,Sun Ying,Cao Yiming
The process intensification in carbonylation of formaldehyde by active and passive enhancement was investigated in stirred tank reactor and membrane contactor, respectively. The increase of rotational speed and decrease of reaction solution volume was advantageous to the yield of glycolic acid in active strengthening experiments, indicating that the reaction was greatly affected by the mass transfer of CO. In passive reinforcement mode, the membrane contactor composed of PTFE hollow fibers with inner diameter of 0.85 mm or 0.42 mm was used as a novel reactor to improve the process mass transfer. The effects of reaction temperature, operation pressure, reaction time and reactant concentration were systematically studied. The results showed that membrane contactor was an effective reactor for the carbonylation of formaldehyde compared to the conventional tank reactor. This study provided a reference for the process intensification of similar gas-liquid reactions.
Graphical abstract
研究领域:
化学工程
·
反应工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
Batteries & Supercaps
·
2025
·
IF 4.7
Haiyan Qin,Xia Sun,Tingzhou Yang,Pengrong Zhang,Haochen Dong,Ning Liu,Yongguang Zhang,Zhongwei Chen
Graphical This study presents a scalable cathode recycling method using a continuous stirred-tank reactor to produce high-performance Li-rich Mn-based cathodes, which achieves 97.38% metal recovery rate and over 500 cycles of superior cycling stability, 22.74% longer lifespan than commercial materials. Life-cycle and economic analyses indicate a 44.22% reduction in costs and significant ecobenefits across all midpoint and endpoint impact categories. As a vital urban mineral resource, the efficient recycling of spent lithium-ion batteries (LIBs) is crucial for mitigating resource scarcity and environmental pollution, especially for obtaining high-value cathode materials through various regeneration methods. Herein, a large-scale recyclable and sustainable direct cathode regeneration strategy is explored to obtain stable lithium-rich manganese-based cathode materials via a customized continuous stirred tank reactor, enabling the transition to next-generation high-energy-density LIBs via battery recycling. A high recycling efficiency between 97.38% and 99.93% is achieved for high-value transition metal elements, and the regenerated next-generation higher-specific capacity cathode materials with higher lattice oxygen and lower oxygen vacancy demonstrate better structural stability and improved electrochemical performance than corresponding commercial materials. Life cycle and technoeconomic analysis are used to highlight the cathode regeneration method, which exhibits significant advantages across all 18 midpoint and 3 endpoint environmental impact categories, with a 44.22% cost reduction compared to commercial materials. This commercialization strategy holds significant promise for advancing closed-loop battery recycling and minimizing environmental pollution in LIB production, offering a new perspective for sustainable battery recycling.
研究领域:
材料科学
·
化学工程
·
环境科学
·
能源技术
·
电化学
·
可持续资源管理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）