Article
Engineering, Chemical
Morteza Aliabadi, Hassan Ghorashi, Shamim Shokri Motlagh, Seyedeh Fatemeh Nabavi, Seyed Arash Pakzad, Mohamad Hossein Farshidianfar, Anooshiravan Farshidianfar, Farzaneh Mahmoudi, Aliakbar Akbarzadeh
Summary: In this study, a multi-staged direct contact membrane distillation (MDCMD) system with a novel bispacer configuration was designed to increase mechanical stability and turbulence, ultimately providing higher permeate flux. Analytical and experimental approaches were used to examine the impact of bispacer and feed operating conditions on the performance and sustainability of the developed MDCMD system. Parameters such as thermal efficiency, gained output ratio, and temperature polarization coefficient were analyzed to evaluate the system.
Article
Biotechnology & Applied Microbiology
Heloisa Bremm Madalosso, Regilene de Sousa Silva, Aline Merlini, Rodrigo Battisti, Ricardo Antonio Francisco Machado, Cintia Marangoni
Summary: This study investigated the operational parameters of direct contact membrane distillation (DCMD) with a commercial membrane applied to synthetic dye solutions. The analytical model accurately predicted the permeate flux with errors less than 10% compared to experimental values. Increasing all variables led to an increase in permeate flux, with a significant impact seen when increasing feed temperature by 30 degrees C. Additionally, the simulation highlighted the influence of permeate temperature and membrane interface temperature on permeate flux.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yukang Zhou, Long Chen, Mengtao Huang, Weilian Hu, Guicai Chen, Binxin Wu
Summary: The effect of membrane material selection and operating conditions on permeate fluxes in direct contact membrane distillation (DCMD) desalination were investigated through experiments. A plate and frame membrane module was used in the experiment, and a comparative analysis of the desalination performance of 3 wt% NaCl solution was performed using nine different hydrophobic porous membranes. The results showed that both PTFE and PVDF membranes performed well in the DCMD experiments, and hot-side inlet temperatures and cold-side inlet flow rates had significant effects on the permeate flux.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Chemical
Sahar Zare, Ali Kargari
Summary: In this paper, CFD simulation and optimization were performed on an energy-efficient direct contact membrane distillation (DCMD) desalination system in a counter-current flow mode. The results were validated with experimental data and the process parameters were optimized to maximize the permeate flux.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Engineering, Chemical
Zhigao Zhu, Wei Wang, Qianyun Zhang, Xuemei Chen
Summary: The study found that designing welded-pore and superhydrophobic fibrous membrane combined with optimizing flow velocity is extraordinarily effective in simultaneously improving membrane water flux and mitigating membrane scaling for concentrating hypersaline wastewaters. These findings are significant for breaking the trade-off between membrane water flux and scaling for practical application in industries.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Shicheng Li, Zhengzhong He, Detao Xiao, Lingfei Guo
Summary: A non-contact membrane distillation method is proposed for radioactive wastewater treatment. The method offers long membrane service life and high and stable permeate flux, making it suitable for large-scale industrial application in volume reduction and deep purification of radioactive wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Chuanshuai Dong, Yang Huang, Haojiang Lin, Lizhi Zhang
Summary: This paper presents a novel two-phase flow enhanced direct contact membrane distillation system and investigates the effect of two-phase flow behaviors on heat and mass transfer and membrane fouling.
Article
Engineering, Chemical
Marie-Charlotte Sparenberg, Bastien Hanot, Cristhian Molina-Fernandez, Patricia Luis
Summary: This study compared the performance of vacuum membrane distillation (VMD) and direct contact membrane distillation (DCMD) by concentrating carbonate solutions. The results showed higher and more stable mass transfer coefficients in VMD, while DCMD was more affected by concentration. Therefore, despite its simplicity, DCMD's performance is inferior to VMD.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Chuanshuai Dong, Yang Huang, Lizhi Zhang
Summary: This study aimed to establish a novel slug flow-enhanced vacuum membrane distillation (VMD) system to address polarization problem and investigate the influence of flow behaviors on MD process. The transmembrane permeate flux was intensified by 28.1% due to increased turbulence and intensified shear stress. The study also showed that the effect of slug flow on membrane fouling had two stages, with a significant reduction observed in conventional VMD system.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Anshul Yadav, Khushboo Singh, Vinod Kumar Shahi
Summary: In this study, side-chain grafted PVDF-HFP fluorinated membranes were prepared to enhance the hydrophobic and anti-fouling properties for desalination of high saline water using the VMD process. Different functional groups were explored for grafting with the PVDF-HFP matrix, and the 2,3,4,5,6-penta fluoro styrene grafted PVDF-HFP membrane showed promising performance with improved water flux, salt rejection, and fouling resistance.
Article
Engineering, Chemical
Rishabh Srivastava, Ankush Kumar Jaiswal, Arjun Jayakumar, Jaichander Swaminathan
Summary: A novel internal feed preheating design is proposed to improve the energy efficiency of modular MEMD systems. The design is evaluated using a 2D CFD model, and custom user-defined functions are implemented to account for water vapor and energy transport. The preheat channels embedded into the condensation plates increase the feed temperature, resulting in a 32% improvement in energy efficiency. However, the added thermal resistance of the preheat channels decreases the average flux and recovery, which can be mitigated by increasing the thermal conductivity.
Article
Engineering, Chemical
Jingjing Liu, Ahmed K. Albdoor, Wenye Lin, Faisal Hai, Zhenjun Ma
Summary: Increasing feed temperature and cross flow velocity can exacerbate membrane fouling, higher feed temperature can enhance DCMD regeneration capacity but reduce membrane hydrophobicity, cleaning the membrane can effectively alleviate membrane fouling but also increase the risk of membrane wetting.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Kaiyun Fu, Yunzhao Guo, Wenbo Qi, Xianfu Chen, Minghui Qiu, Yiqun Fan
Summary: Ceramic membranes are promising in membrane distillation due to their high mechanical strength and thermal stability. However, the multilayer structure of ceramic membranes poses difficulties in predicting permeate flux. A modeling approach and correlations were developed to simplify the calculation process and estimate the effect of membrane parameters on permeate flux.
Article
Engineering, Environmental
M. S. Ismail, A. M. Mohamed, D. Poggio, M. Walker, M. Pourkashanian
Summary: A two-dimensional numerical model has been developed to investigate the sensitivity of the simulated transmembrane flux in a direct contact membrane distillation module used for desalination and wastewater treatment. The model explores the impact of different assumptions and simplifications related to mass transport in the membrane, as well as the effect of a slight pressure difference across the membrane.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Chemical
Mohamed E. A. Ali, Rayan Alghanayem, Aislinn Varela, Marion Bellier, Francois Perreault
Summary: This study demonstrates the potential of using air microbubbles (MB) for scaling mitigation in membrane distillation (MD) processes. The addition of MB was found to reduce membrane scaling and prevent salt crystal formation on the membrane surface. The effectiveness of scaling mitigation by MB was dependent on the MD operating conditions, with better performance at lower feed temperatures and flow rates. Continuous MB injection was more effective than a periodic on/off MB regime, emphasizing the prevention of scaling rather than dislodging of the scaling layer.
Article
Engineering, Environmental
Dong-Wan Cho, Sohyun Kim, Yiu Fai Tsang, Hocheol Song
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2019)
Article
Agricultural Engineering
Fan Yang, Shuaishuai Zhang, Dong-Wan Cho, Qing Du, Jingpeng Song, Daniel C. W. Tsang
BIORESOURCE TECHNOLOGY
(2019)
Article
Engineering, Environmental
Kwangsuk Yoon, Dong-Wan Cho, Yiu Fai Tsang, Daniel C. W. Tsang, Eilhann E. Kwon, Hocheol Song
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Environmental Sciences
Zhonghao Wan, Dong-Wan Cho, Daniel C. W. Tsang, Meng Li, Tan Sun, Francis Verpoort
ENVIRONMENTAL POLLUTION
(2019)
Article
Agricultural Engineering
Leichang Cao, Iris K. M. Yu, Dong-Wan Cho, Di Wang, Daniel C. W. Tsang, Shicheng Zhang, Shiming Ding, Linling Wang, Yong Sik Ok
BIORESOURCE TECHNOLOGY
(2019)
Article
Engineering, Environmental
Kwangsuk Yoon, Jong-Min Jung, Dong-Wan Cho, Daniel C. W. Tsang, Eilhann E. Kwon, Hocheol Song
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Engineering, Environmental
Lei Wang, Liang Chen, Dong-Wan Cho, Daniel C. W. Tsang, Jian Yang, Deyi Hou, Kitae Baek, Harn Wei Kua, Chi-Sun Poon
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Thermodynamics
Gihoon Kwon, Dong-Wan Cho, Deok Hyun Moon, Eilhann E. Kwon, Hocheol Song
APPLIED THERMAL ENGINEERING
(2019)
Article
Engineering, Environmental
Dong-Wan Cho, Kwangsuk Yoon, Yongtae Ahn, Yuqing Su, Daniel C. W. Tsang, Deyi Hou, Yong Sik Ok, Hocheol Song
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Kwangsuk Yoon, Jeong-Ik Oh, Daniel C. W. Tsang, Eilhann E. Kwon, Hocheol Song
JOURNAL OF CO2 UTILIZATION
(2019)
Article
Engineering, Environmental
Gihoon Kwon, Dong-Wan Cho, Kwangsuk Yoon, Hocheol Song
Summary: In this study, iron-carbon composites were prepared through co-pyrolysis of polyethylene (PE) and goethite and used as an activator for persulfate in catalytic oxidation of the azo dye amaranth. The composites' properties were influenced by the pyrolytic temperature, leading to enhanced degradation of amaranth and improved activation of persulfate.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Kwangsuk Yoon, Dong-Wan Cho, Amit Bhatnagar, Hocheol Song
ENVIRONMENTAL RESEARCH
(2020)
Article
Engineering, Environmental
Kwangsuk Yoon, Dong-Wan Cho, Hailong Wang, Hocheol Song
Summary: This study explores the feasibility of simultaneously producing synthetic gases and metal-biochar catalyst through co-pyrolysis of microalgae and industrial waste. The results show that CO2 atmosphere significantly enhances CO production and the effect is more pronounced when industrial waste is incorporated. The produced metal-biochar has a porous structure and catalytic capability, effectively removing methyl orange. This research is important for utilizing biomass waste for energy production and treating redox active contaminants.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Kyung-Min Lee, Byeongseok Kim, Juwon Lee, Gihan Kwon, Kwangsuk Yoon, Hocheol Song, Kyung Hoon Min, Sang Eun Shim, Sungwon Hwang, Taejin Kim
Summary: This study investigates the effects of oxidation and reduction treatments on the NO reduction by CO over NiOx/CeO2 catalysts. The results show that the physicochemical properties of the catalysts were significantly influenced by the pretreatment temperature.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)