Carbon molecular sieve (CMS) membranes have been developed to replace or support energy-intensive cryogenic distillation for olefin/paraffin separation. Olefin and paraffin have similar molecular properties, but can be separated effectively by a CMS membrane with a rigid, slit-like pore structure. A variety of polymer precursors can give rise to different outcomes in terms of the structure and performance of CMS membranes. Herein, for olefin/paraffin separation, the CMS membranes derived from a number of polymer precursors (such as polyimides, phenolic resin, and polymers of intrinsic microporosity, PIM) are introduced, and olefin/paraffin separation properties of those membranes are summarized. The effects from incorporation of inorganic materials into polymer precursors and from a pyrolysis process on the properties of CMS membranes are also reviewed. Finally, the prospects and future directions of CMS membranes for olefin/paraffin separation and aging issues are discussed.

A high-performance thin carbon molecular sieve (CMS) composite membrane was prepared using a drop-coating process for dehydration of a ternary mixture (water/IPA/ECH) by a pervaporation process.

The study was conducted with an aim to study the animal fat as single (halal tallow) and combined state (halal tallow and haram lard combination) on growth performance, relative organ weight, cecal microbiology and noxious gas concentration in broilers on the aspect of halal ethical issue. Following completely randomized design, a total of 96 day old Ross broiler chicks were allocated into two treatments (TLO: Basal diet with tallow; TPL: Basal diet with tallow+lard), where there was six replications with eight birds per replicate pen. Feed and water was provided ad libitum with dividing starter (0 to 3 weeks) and finisher (4 to 5 weeks) period. The result revealed that, growth performancedid not differ between TLO and TPL (P>0.05); however, immunity (IgM) was higher in TLO in comparison to TPL (P<0.05). Among the internal organs, small intestine, large intestine and cecum weight was higher in TLO relative to the TPL (P<0.05).In addition, cecal and excreta pH was lower in TLO than the TPL (P<0.05); where, among cecalmicrobiology, Bacillus sp. count was higher in TLO compared to TPL (P<0.05). Excreta noxious gas concentration data revealed that, ammonia gas was lower in TLO during 0 hour, 3 hour and 12 hour incubation period, while the average value also significantly lower in TLO in relation to the TPL (P<0.05). The hydrogen sulfide and sulfur dioxide gas did not differ between TLO and TPL (P>0.05). Economic analysis data elucidated that, there was no significant difference for cost per unit of gain between TLO and TPL (P>0.05). The result suggested that, tallow and lard combination has no negative impact on the growth performance; however, there was higher excreta noxious gas concentration, which is one of the important issues for the environmental aspects from the broiler industry. Therefore, single use of animal fat (halal tallow) for halal broiler production are preferred instead of combination with another animal fat (haram lard).

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Real black" plasma display panels (PDPs) having a background luminance of zero cd/m2 must be realized to obtain high picture quality. PDPs, however, must have reset discharges to initialize cell conditions, regardless of expressing any of the gray levels. The light emission from the reset discharges becomes a background luminance, degrading the picture quality having low luminance levels. A technique of substituting the role of the reset discharges is proposed for 50-in. full-HD PDPs. With this technique an infinite dark-room contrast ratio is obtained. However, it has the problem of the discharge delay. A solution to this was proposed by using the frame reset or the minimum surface reset discharge and selective reset.

For ethylene/ethane separation, a CMS (carbon molecular sieve) membrane was developed with a PAN (polyacrylonitrile) polymer precursor on an alumina support. To provide an excellent thermal property to PAN precursor prior to the pyrolysis, the stabilization as a pre-treatment process was carried out. Tuning the stabilization condition was very important to successfully preparing the CMS membrane derived from the PAN precursor. The stabilization and pyrolysis processes for the PAN precursor were finely tuned, and optimized in terms of stabilization temperature and time, as well as pyrolysis temperature, heating rate, and soaking time. The PAN stabilized at >250 °C showed improved thermal stability and carbon yield. The CMS membrane derived from stabilized PAN showed reasonable separation performance for ethylene permeance (0.71 GPU) and ethylene/ethane selectivity (7.62), respectively. Increasing the pyrolysis temperature and soaking time gave rise to an increase in the gas permeance, and a reduction in the membrane selectivity. This trend was opposite to that for the CMS membranes derived from other polymer precursors. The optimized separation performance (ethylene permeance of 2.97 GPU and ethylene/ethane selectivity of 7.25) could be achieved at the pyrolysis temperature of 650 °C with a soaking time of 1 h. The separation performance of the CMS membrane derived from the PAN precursor was comparable to that of other polymer precursors, and surpassed them regarding the upper bound trade off.

The performance enhancement of various structural building systems from natural hazards has become an inctreasingly important issue in engineering field. In this paper, visco-elastic(VE) CST30 damping systems were tested under cyclic loadings to evaluate their performance in terms of ductility and energy dissipation. Main test variables are relative shear stiffness, rate of loading frequency, and thickness of specimens to evaluate the seismic capacity based on the performance criteria. This experiment was performed using a total of 12 specimens, subjected to cyclic loadings up to a shear deformation of 500%. All the CST30 dampers provided a ductile and stable hysterestic behavior when subjected to the demands of large shear stiffness and different loading frequencies. The test results showed that the CST30 dampers are an effective damping systems to enhance the buildings performance for remodeling and retrofit of buildings. Keywords : CST30, damper, Visco-elastic, Ductility, Energy dissapition