Permporometry. The determination of the size distribution of active pores in UF membranes
نویسنده
چکیده
Permporometry IS a method by which the characterlstlcs of the mterconnectmg ‘active’ pores of an ultrafiltration membrane can be measured It 1s these ‘active’ pores that are responsible for the actual membrane performance Apphcatlon of permporometry on different membrane types, including ceramic as well as polymeric membranes, shows that the method can provide obJectwe mformatlon on the ‘active’ pore sizes present
منابع مشابه
Permporometry study on the size distribution of active pores in porous ceramic membranes
Permporometry as well as nitrogen adsorption-desorption techniques have been applied to study the pore size distribution in y-alumina membranes with a pore radius ranging from about 2 nm to 10 nm. The permporometry technique measures the active pores only, while nitrogen adsorption-desorption measures the active as well as the passive pores. The pore size distribution in the porous ceramic memb...
متن کاملCharacterization of Commercial Ceramic and Hybrid Membranes Using Gas Permeation and Permporometry Tests
The gas separation performance of commercial ceramic Titania and hybrid silica (HybSi®) membranes was assessed using the gas permeation and permporometry methods. Results indicated that the HybSi® membranes have a hybrid surface containing regions covered by a polymeric matrix and others with inorganic pores. These membranes have high H2 selectivity, which incre...
متن کاملCharacterization of anisotropic UF-membranes: top layer thickness and pore structure*
Anisotropic poly(2,6-dimethyl-, 1,4-phenylene oxide) (PPO) ultrafiltration membranes are characterized by means of two techniques. A new method for the determination of skin thicknesses, the gold sol method, is introduced and applied to these membranes. The membranes appeared to have a well-defined skin with a thickness of 0.2 pm. The results were combined with permporometry, a method that meas...
متن کاملA New Approach for Determination of Neck-Pore Size Distribution of Porous Membranes via Bubble Point Data
Reliable estimation of the porous membranes neck-pore size distribution (NPSD) is the key element in the design and operation of all membrane separation processes. In this paper, a new approach is presented for reliable of NPSD of porous membranes using wet flow-state bubble point test data. For this purpose, a robust method based on the linear regularization theory is developed to extract NPSD...
متن کاملOptimized Tree-Type Cylindrical-Shaped Nanoporous Filtering Membranes with 6 or 7 Branch Pores in each Pore Tree
The performances of the optimized tree-type cylindrical-shaped nanoporous fltering membranes with six or seven branch pores in each pore tree are analytically studied. The radius Rb,1 of the branch pore for fltration is normally on the 1 or 10 nm scales. The larger trunk pore is for ...
متن کامل