Fabrication and characterization of kaolin based membrane for catalyst recovery

In this project work, Kaolin was the primary raw material for membrane fabrication. Various additives/binders were also used based on their suitability and effectiveness in imparting special properties e.g. mechanical strength and dispersion properties for homogeneity to the final or finished membrane. During membrane preparation with various stoichiometric compositions of ingredients, it was observed that higher percentages of kaolin didn’t result into membranes with good flexural strength whereas increasing the % of red-mud enhanced the mechanical strength quite considerably e.g. 10.11 MPa (membrane F), 18.93 MPa (membrane G) and 12.04 MPa (membrane H) respectively. Methanol permeation studies showed that the average steady state flux was highest for membrane G (ca. 4.23×10-4 m3 m-2 sec-1). The fabricated membranes were undergone catalyst recovery study in a batch membrane module. In this work, Cu-BTC (or, HKUST-1 or, MOF-199), a well-known Metal Organic Framework (MOF) was selected as the potential catalyst. Several cycles (or batches) were carried out inside the membrane module and it was observed that membrane G performed better than the rest and a recovery percentage of ca. 61% was noted after 3 cycles before the membrane pores were completely choked. Membrane de-fouling and regeneration studies were carried out in detail using back-washing treatment inside the module itself and ultra-sonication techniques for preparing the membranes for next round of operations

Ethyl 2-[(phenyl­sulfan­yl)meth­yl]-1-(phenyl­sulfon­yl)-1H-indole-3-carboxyl­ate

In the title compound, C24H21NO4S2, the phenyl rings form dihedral angles of 85.77 (9) and 85.22 (9)° and the ester group forms an angle of 12.61 (10)° with the indane ring. The mol­ecular structure is stabilized by weak intra­molecular C—H⋯O inter­actions

SD-BROV: An enhanced BGP hijacking protection with route validation in software-defined exchange

10.3390/fi13070171Future Internet13717

Improvements of TPS-porous asphalt using wax- based additives for the application on Malaysian expressway

Porous asphalt provides a sustainable approach to reduce traffic noise at source, while at the same time offering storm-water management systems which promote infiltration and often reduce the need for a detention pool. However, porous asphalt is prone to premature deteriorations, in terms of ravelling, and air voids clogging, rendering its unpopularity as the road surfacing material for expressways construction. In this research, the comparative influences of Tough Fix (TF) and Tough Fix Hyper (TFH) additives incorporation were evaluated on the performance of Tafpack-Super modified porous asphalt mixtures (TPS-PA). The Tafpack-Super (TPS) as a modifier at 20%, and anti-stripping additives (TF and TFH) with dosages used in this study were 0.3%, and 0.15% based on the weight of asphalt binder, respectively. Initially, the PA mixtures were prepared according to a predetermined mix design, and verified based on the percentage of air voids, permeability, and connected air voids. Comprehensive experimental tests of Marshall stability, permeability, Cantabro loss, rutting resistance, and moisture induced damage resistance were performed to assess the mechanical performance of the TPS-PA mixtures. Moreover, the Texas boiling test was employed to assess the stripping potential of loose TPS-PA mixtures. The experimental results revealed that both TF and TFH are capable of improving the PA resistance against rutting, ravelling, and moisture damage. In addition, the porous asphalt with TFH anti-stripping agent incorporation exhibited a superior overall performance as compared to the PA with TF