CHAPTER 5. Combined Photocatalysis–Separation Processes for Water Treatment Using Hybrid Photocatalytic Membrane Reactors

2016 ◽  
pp. 130-156 ◽  
Author(s):  
Teik-Thye Lim ◽  
Ronn Goei
Keyword(s):  
Water Treatment ◽  
Membrane Reactors ◽  
Separation Processes

Mass Transfer in Tubular Ceramic Membranes for Polluted Water Treatment - Numerical Simulation

2018 ◽  
Vol 20 ◽  
pp. 16-33 ◽  
Author(s):  
J. Saraiva de Souza ◽  
S. José dos Santos Filho ◽  
Severino Rodrigues de Farias Neto ◽  
A.G. Barbosa de Lima ◽  
H.A. Luma Fernandes Magalhães
Keyword(s):  
Mass Transfer ◽  
Water Treatment ◽  
Produced Water ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Ceramic Membranes ◽  
Numerical Results ◽  
Polluted Water ◽  
Separation Processes ◽  
Water Separation

Innovative technologies are needed to attend the increasingly strict requirements for produced water treatment, since most of the separation processes are limited to particles larger than 10 μm. Separation processes using ceramic membranes are attracting great interest from academic and industrial community. Nevertheless, few studies, especially numerical, regarding the inorganic membrane’s application for the polluted water separation have been reported. In the present work, therefore, a study of fluid-flow dynamics for a laminar regime in porous tubes (tubular porous ceramic membrane) has been performed. The mass, momentum and mass transport conservation equations were solved with the aid of a structured mesh using ANSYS CFX commercial package. The velocity of local permeation was determined using the resistance in series model. The specific resistance of the polarized layer was obtained by Carman-Kozeny equation. The numerical results were evaluated and compared with the results available in the literature, where by a good agreement with each other was found. The numerical results, obtained by the proposed shell and tubular membrane separation module, indicate that there is facilitation of mass transfer and hence a reduction in the thickness of the polarized boundary layer occurs.

scholarly journals Ionic liquids as an enabling tool to integrate reaction and separation processes

2019 ◽  
Vol 21 (24) ◽  
pp. 6527-6544 ◽  
Author(s):  
Rocio Villa ◽  
Elena Alvarez ◽  
Raul Porcar ◽  
Eduardo Garcia-Verdugo ◽  
Santiago V. Luis ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microfluidic Devices ◽  
Chemical Processes ◽  
Membrane Reactors ◽  
Separation Processes ◽  
Catalytic Systems

This tutorial review highlights representative examples of ionic liquid (IL)-based (bio)catalytic systems integrating reaction and separation, as a tool for the development of sustainable chemical processes (e.g. IL/scCO2 biphasic reactors, membrane reactors, nanodrop systems, microfluidic devices, supported IL phases, sponge-like ILs, etc.).

Photocatalytic membrane reactors for water treatment from organic pollutants

2009 ◽  
Vol 31 (4) ◽  
pp. 227-237 ◽  
Author(s):  
V. M. Kochkodan ◽  
E. A. Rolya ◽  
V. V. Goncharuk
Keyword(s):  
Water Treatment ◽  
Organic Pollutants ◽  
Membrane Reactors

scholarly journals Bibliometric approach to the perspectives and challenges of membrane separation processes to remove emerging contaminants from water

2020 ◽  
Vol 82 (9) ◽  
pp. 1721-1741
Author(s):  
Jéssica Stefanello Cadore ◽  
Lucas Fernando Fabro ◽  
Thuany Garcia Maraschin ◽  
Nara Regina de Souza Basso ◽  
Marçal José Rodrigues Pires ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Treatment ◽  
Emerging Contaminants ◽  
Membrane Separation ◽  
High Surface ◽  
High Surface Area ◽  
Industrial Applications ◽  
Mechanical Resistance ◽  
Separation Processes ◽  
Research Attention

Abstract The presence of contaminants in water is concerning due to the potential impacts on human health and the environment, and ingested contaminants cause harm in various ways. The conventional water treatment systems are not efficient to remove these contaminants. Therefore, novel techniques and materials for the removal of contaminants are increasingly being developed. The separation process using modified membranes can remove these micropollutants; therefore, they have attracted significant research attention. Among the materials used for manufacturing of these membranes, composites based on graphene oxide and reduced graphene oxide are preferred owing to their promising properties, such as mechanical resistance, thermal and chemical stability, antifouling capacity, water permeability, high thermal and electrical conductivity, high optical transmittance and high surface area. Membrane separation processes (MSP) can be used as secondary or tertiary treatment during the supply of wastewater. However, the efficient and accessible applications of these technologies are challenging. This study aims to demonstrate the main concepts of membrane separation processes and their application in the removal of emerging contaminants. This study reports bibliometric mapping, relevant data on studies using membranes as water treatment processes, and their viability in industrial applications. The main challenges and perspectives of these technologies are discussed in detail as well.

scholarly journals Challenges of Membrane Technology in Biorefineries

2020 ◽  
Vol 24 (3) ◽  
Author(s):  
Lukka Thuyavan Yogarathinam ◽  
Ahmad Fauzi Ismail ◽  
Pei Sean Goh ◽  
Arthanareeswaran Gangasalam
Keyword(s):  
Membrane Fouling ◽  
Membrane Separation ◽  
Membrane Technology ◽  
Membrane Reactors ◽  
Biodiesel Production ◽  
Biofuel Production ◽  
Polymeric Membrane ◽  
Separation Processes ◽  
Significant Control ◽  
Membrane Engineering

Membrane separation processes have been deployed for downstream applications in biorefineries. This article discusses the challenges of membrane technology in purification of biofuels such as bioethanol, biodiesel and biogas. The significance of membrane technology are discussed towards the fractionation of lignocellulosic biomass for biofuel production.  The membrane reactors for biodiesel production were also studied. Limitation with respect to each individual processes on biofuel purification were also reported. The major limitation in membrane separation are membrane fouling and concentration polarization. Membrane engineering and process optimization are the viable tools to enhance the performance of membrane. Recently, inorganic nanofillers has significant control in alteration of polymeric membrane characteristics for the improvement of permeability and selectivity. This article would be an insight for researchers to understand the challenges of biorefinery membrane separation.

Tailored polymer nanocomposite membranes based on carbon, metal oxide and silicon nanomaterials: a review

2019 ◽  
Vol 7 (15) ◽  
pp. 8723-8745 ◽  
Author(s):  
Meenakshi Sundaram Sri Abirami Saraswathi ◽  
Alagumalai Nagendran ◽  
Dipak Rana
Keyword(s):  
Water Treatment ◽  
Metal Oxide ◽  
Polymer Nanocomposite ◽  
Nanoscale Materials ◽  
Nanocomposite Membranes ◽  
Separation Processes ◽  
The Past ◽  
Structure Synthesis

Research into the structure, synthesis and properties of nanoscale materials has increased at an enormous pace over the past decades since they have a wide variety of applications ranging from adsorption to separation processes in water treatment.

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