Article
Chemistry, Applied
Shuai Guo, Le-wu Zhan, Guang-kai Zhu, Xin-guang Wu, Bin-dong Li
Summary: This study reported the kilogram-scale synthesis of 2-ethylhexyl nitrate in a microreactor, with a focus on the effects of process parameters on product yield. Experimental results were in good agreement with the regression model predictions, and computational fluid dynamics simulations demonstrated the excellent mixing efficiency of the microreactor compared to conventional reactors. An enlarged microreactor was designed for intensified preparation of 2-ethylhexyl nitrate.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2022)
Article
Engineering, Chemical
Honggang Yang, Nan Wang, Yingxue Cao, Xiaojing Meng, Lei Yao
Summary: This study investigated the separation performance of a cyclone separator after reshaping its cylindrical body with helical triangular fins. A numerical simulation using Fluent was used to optimize the structure of the cyclone separator. The optimal combination scheme was determined and the performances of the separator before and after optimization were compared. The results showed that the finned cyclone separator significantly increased the separation efficiency and stability of the flow field.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Ganghui Liu, Weibing Wang, Junzhi Yu, Xiaojun Li
Summary: This study optimized and analyzed a cyclone separator with extra inlets to reduce wall erosion and improve separation efficiency, achieving a 14.5% reduction in pressure drop and a 10% increase in total separation efficiency for the optimal cyclone.
Article
Engineering, Multidisciplinary
Mohd Azri Mohd Nor, Shahrul Kamaruddin, Tamiru Alemu Lemma
Summary: This research investigates the effects of geometrical parameters of API plan 31 cyclone separator on pressure drop and seal flow rate. The results indicate that increasing overflow and underflow radius and length of cylinder and conical can decrease pressure drop, while increasing vortex finder length can increase pressure drop. Moreover, increasing radius overflow and length of vortex finder can increase flow rate to seal, while increasing radius underflow and length of cylinder and conical can decrease flow rate to seal. The study also highlights the importance of considering all geometrical factors in the base design of cyclone separator.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Camilo Zabala-Quintero, Jesus Ramirez-Pastran, Maria Josefina Torres
Summary: In this study, the performance of a new Stairmand-type separator cyclone was characterized using Computational Fluid Dynamics techniques. Among the four models tested, Model D exhibited the highest separation efficiency and pressure drop reduction.
APPLIED SCIENCES-BASEL
(2021)
Article
Thermodynamics
Qianying Yi, Guoqiang Zhang, Barbara Amon, Sabrina Hempel, David Janke, Chayan Kumer Saha, Thomas Amon
Summary: The study established models for the air change rate (ACR) of naturally ventilated dairy buildings based on a quantitative investigation, with findings showing that the opening ratio had minor impact on the developed response surface models. Results indicated that the wind speed, wind direction, and opening ratio significantly affected ACR, with interaction effects also playing an important role in influencing the ventilation rate.
BUILDING SIMULATION
(2021)
Article
Engineering, Chemical
Zeming Fu, Huagen Wu, Mengtao Liang, Zhendong Guo, Liang Hou, Ziwen Xing
Summary: An improved design incorporating helical fins onto the vortex finder was proposed in this study. The impact on the comprehensive performance of the oil-gas cyclone separator was analyzed based on flow field characteristics. The results showed that the integration of helical fins led to an enhancement in separation efficiency and a reduction in pressure drop, contributing to decreased energy consumption.
CHEMICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Kaiwei Chu, Yanxing Chen, Li Ji, Zongqing Zhou, Aibing Yu, Jiang Chen
Summary: This study presents a numerical investigation of gas-solid flow in a gas cyclone using a coarse-grained combined Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD) model. The results demonstrate that the model captures the typical flow features in a gas cyclone and highlights the importance of including the van der Waals force for accurate separation efficiency prediction.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Ming Guo, Hao Xue, Jian Pang, Dang Khoi Le, Xun Sun, Joon Yong Yoon
Summary: By comparing the CVF and SVF_D1, SVF_D2 models of cyclone separator, the influence of SVF on the swirling turbulent flow characteristics was analyzed in detail. It was concluded that the SVF_D2 model could improve the separation efficiency and reduce the pressure drop. This study helps to clarify the impact of SVF on the mechanism of particle separation motion in cyclone separator and identify the differences between traditional cyclone separator and cyclone with SVF installation.
Article
Engineering, Chemical
B. Gopalakrishnan, G. Saravana Kumar, K. Arul Prakash
Summary: In this study, the separation of particles in an axial swirl tube cyclone separator is numerically investigated using a combination of Eulerian-Lagrangian approach and Reynolds Averaged Navier-Stokes equations with RNG K-epsilon model. The impact of four significant geometric parameters on the performance of the cyclone separator is studied through numerical analysis and multiobjective optimization. The optimization results show a trade-off between pressure drop and filtration efficiency, leading to improved overall performance compared to the conventional configuration.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Dang Khoi Le, Ming Guo, Joon Yong Yoon
Summary: A hybrid CFD-DL method is proposed to predict the cut-off diameter in cyclone separators. The method shows lower computational cost and higher accuracy (mean error less than 5.1% compared to experimental data) than traditional CFD. It takes advantage of a novel approach to decrease computational time while improving accuracy for CFD simulations.
JOURNAL OF AEROSOL SCIENCE
(2023)
Article
Engineering, Chemical
Zeyu Li, Zhenbo Tong, Aibing Yu, Hao Miao, Kaiwei Chu, Hao Zhang, Gang Guo, Jiang Chen
Summary: Hydrogen utilization is gaining attention and the supercritical water circulating fluidized bed reactor can generate hydrogen. This study uses CFD to analyze cyclone separation mechanisms under supercritical fluid, finding that changing the content of carbon dioxide and adding extra dipleg can improve cyclone performance.
Article
Engineering, Chemical
Liri Yoko Cruz Prieto Hojo, Ricardo Vicente de Paula Rezende, Sandro Rogerio Lautenschlager, Lyda Patricia Sabogal-Paz
Summary: This study analyzed the hydrodynamics of household slow sand filters (HSSFs) using computational fluid dynamics (CFD), revealing the flow characteristics inside the filters and identifying the working principles and filtering effects. Experimental results showed that HSSFs have flow characteristics close to plug flow reactors, with some dead zones found at the base of the filters.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Baisong Hu, Shuo Liu, Chuanzhi Wang, Bingjun Gao
Summary: The high-pressure polyethylene process uses cyclone separators to separate ethylene gas, polyethylene, and its oligomers, but low separation efficiency of the cyclone separators leads to frequent filter cleaning and reduced production efficiency. Computational Fluid Dynamics simulations were performed to analyze the effects of eight structural factors on separation efficiency and pressure drop, and optimization analysis showed that separation efficiency can be improved by 98.7% with a slight increase in pressure drop. By applying the improved structure, separation efficiency is increased by 17.7% and greatly improves production efficiency.
Article
Engineering, Chemical
Ming Guo, Dang Khoi Le, Xun Sun, Joon Yong Yoon
Summary: This study proposed a new vortex finder and applied it in the Stairmand cyclone separator to improve its performance. The researchers used experimental design and model construction techniques to find the optimal solution, and validated its effectiveness through experiments.
Article
Engineering, Chemical
Nisha Subash, R. Krishna Prasad
DESALINATION AND WATER TREATMENT
(2016)
Article
Engineering, Chemical
C. S. Sridhar, P. Sabareesh Sankar, R. Krishna Prasad
PARTICULATE SCIENCE AND TECHNOLOGY
(2016)
Article
Materials Science, Multidisciplinary
Nitin Sankar, Mamilla Nagarjun Reddy, R. Krishna Prasad
BULLETIN OF MATERIALS SCIENCE
(2016)
Article
Engineering, Chemical
D. Aravind, R. Krishna Prasad
DESALINATION AND WATER TREATMENT
(2016)
Article
Environmental Sciences
R. Krishna Prasad
INTERNATIONAL JOURNAL OF GLOBAL WARMING
(2016)
Article
Energy & Fuels
M. Shobana, R. Krishna Prasad, Udaya Bhaskar Reddy Ragula, Duraisamy Kumaresan
Article
Energy & Fuels
R. Keshav Johar, G. Saravanakumar, R. Krishna Prasad
INTERNATIONAL JOURNAL OF OIL GAS AND COAL TECHNOLOGY
(2018)
Article
Energy & Fuels
N. Rajeev, R. Krishna Prasad, U. B. Reddy Ragula
PETROLEUM SCIENCE AND TECHNOLOGY
(2015)
Article
Engineering, Chemical
Jishnu Krishnan, Susmith Sunil Kumar, R. Krishna Prasad
CHEMICAL ENGINEERING COMMUNICATIONS
(2020)
Article
Energy & Fuels
V Aarathi, E. Harshita, Atira Nalinashan, Sidharrthh Ashok, R. Krishna Prasad
INTERNATIONAL JOURNAL OF SUSTAINABLE ENERGY
(2019)
Article
Environmental Sciences
Palaniappan Ramesh, Rajan Krishna Prasad, Rajoo Baskar
ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL
(2017)
Article
Engineering, Environmental
P. Sabareesh Sankar, R. Krishna Prasad
INTERNATIONAL JOURNAL OF ENVIRONMENTAL TECHNOLOGY AND MANAGEMENT
(2016)
Article
Environmental Sciences
R. Krishna Prasad
ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL
(2014)
Article
Engineering, Environmental
Akshay Menon, T. Akhil, R. Krishna Prasad
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2018)