Development of pan based composite membranes for pervaporation

Development of PBI based membranes for H₂/CO₂ separation Başdemir, Merve; Yılmaz, Levent; Kalıpçılar, Halil; Department of Chemical Engineering (2013) Recent developments have confirmed that in the future hydrogen demand in industrial applications will arise because of the growing requirements for H2 in chemical manufacturing, petroleum refining, and the newly emerging clean energy concepts. Hydrogen is mainly produced from the steam reforming of natural gas and water gas shift reactions. The major products of these processes are hydrogen and carbon dioxide. The selective removal of CO2 from the product gas is important because it poisons catalysts in the...
Development and characterization of composite proton exchange membranes for fuel cell applications Akay, Ramiz Gültekin; Baç, Nurcan; Department of Chemical Engineering (2008) Intensive research on development of alternative low cost, high temperature membranes for proton exchange membrane (PEM) fuel cells is going on because of the well-known limitations of industry standard perfluoro-sulfonic acid (PFSA) membranes. To overcome these limitations such as the decrease in performance at high temperatures (>80 0C) and high cost, non-fluorinated aromatic hydrocarbon based polymers are attractive. The objective of this study is to develop alternative membranes that possess comparable ...
Use of ionic strength responsive polymeric microgels for fouling removal in membrane filtration Çalılı, Fatma; Çulfaz Emecen, Pınar Zeynep; Asatekin, Ayşe; Department of Chemical Engineering (2019) Stimuli-responsive polymeric surfaces can improve non-fouling properties of membranes and control their pore size and permeation characteristics upon alteration of stimulus intensity. In this study, zwitterionic poly(sulfobetaine methacrylate) (P(SBMA)) microgels have been added into the feed or deposited on the membrane surfaces to clean foulant deposits formed on the surface of the membranes after the filtration. Salt-responsive P(SBMA) microgels have altered their phase from swollen to shrunk, swollen to...
Investigation of parameters affecting morphology of microfiltration and ultrafiltration membranes fabricated via phase separation microfabrication Bolat, Cankut Kaan; Çulfaz Emecen, Pınar Zeynep; Bat, Erhan; Department of Chemical Engineering (2017) This study examines the factors affecting the morphology of polyethersulfone membranes produced via phase separation microfabrication technique. Flat and corrugated membranes were prepared using a combination of vapor induced and liquid induced phase separation, and characterized using scanning electron microscopy, pure water permeance tests and Baker’s yeast (Saccharomyces Cerevisiae) fouling tests. An inverse asymmetric morphology was tried to be achieved for corrugated membranes, in order to increase the...
A Combinatorial study on hydrogen separation membranes Pişkin, Fatih; Öztürk, Tayfur; Department of Metallurgical and Materials Engineering (2018) Metallic membranes among the hydrogen separation membranes are quite attractive due to their very high hydrogen selectivity and hydrogen permeability. The efforts in metallic membranes generally concentrate on to identify membrane compositions which have a high hydrogen permeability with a reduced cost. Among the metallic membranes, Pd and Pd alloys, i.e. f.c.c. membranes are quite common as separation membranes. However, the high cost of Pd limits its widespread use in industrial applications. The efforts ...

Citation Formats

E. Okumuş, “Development of pan based composite membranes for pervaporation,” Ph.D. - Doctoral Program, Middle East Technical University, 1998.