Condensation of 2-NH 2 C 6 H 4 P(Et)Ph (2) with pyrrole-2-carboxaldehyde generated 2-(C 4 H 4 N-2′-CHN)-C 6 H 4 P(Et)Ph (3). Treatment of 3 with NaH and followed by (DME)NiX 2 (X = Cl, Br) afforded mononuclear pincer nickel complexes [Ni{2-(C 4 H 3). Catalysis of the complexes for the activation and transformation of C−Cl, C−N, and C−O bonds was evaluated. Complex 7c exhibited excellent catalytic activity in the cross-coupling of aryl chlorides or aryltrimethylammonium iodides with arylzinc reagents as well as of aryl sulfamates with aryl Grignard reagents. The dinuclear nickel complexes 7b−d showed higher catalytic activity than the mononuclear complexes in each type of reaction.

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This paper describes work performed in an attempt to bring more clarity regarding the differences in potential corrosive effect between sulfides and disulfides at specified reaction conditions as defined in ASTM 1275 B. SEM/EDS was used to further evaluate testing results. The results show that Dibenzyl disulfide (DBDS) has a strong tendency to form copper sulfides while Dibenzyl sulfide (DBS) display no tendency at all to form copper sulfides in the virgin insulating oils, but the reactivity of DBS increase if in the thermally degraded oils. In addition, the insulating paper decrease the oxidation of the copper surface due to that oxygen is adsorbed and consumed when migrating through the cellulose phase. With the improvement of surface smoothness, the specific surface area accessible for reactions will decrease and consequently it is more difficult for the copper to be corroded by DBDS.

In this study, we investigated the influence of MnTiO3 nanoparticles additive on hydrogen released performance of NaAlH4 for the first time. The MnTiO3 nanoparticles were successfully synthesized using conventional solid-state ceramic route. It was found that the hydrogen released performance of NaAlH4 can be significantly improved by the addition of MnTiO3 nanoparticles. Meantime, the composite of NaAlH4 doped 5 wt% MnTiO3 possessed excellent dehydrogenation properties, the onset dehydrogenation temperature was only 70.6 °C, reduced by about 105 °C in comparison with the pristine NaAlH4, and approximately 5.01 wt% of hydrogen could be released from composite with temperature heated to 220 °C. The isothermal dehydrogenation test results indicated that the amount of hydrogen released by NaAlH4-5 wt% MnTiO3 composite could reach 4.4 wt% under 200 °C within 25 min. According to the analysis of X-ray diffraction, the presence of MnTiO3 nanoparticles did not alter the overall dehydrogenation pathway of NaAlH4, and the Al3 Ti phases formed after dehydrogenation, which enhanced hydrogen desorption performances of NaAlH4 .

Pore flow model defined the dense layer as "pore" like nanofiltration which was not very reasonable, since the "pore" free volume formed by random movement of polymer chain was not fixed. Virtual phase change model was the combination of dissolution-diffusion model and pore flow model which was of some self-contradiction. Evaporationpermeation model treated the pervaporation as two separate processes, liquid evaporation and vapor permeation. The total separation factor was not equaled to the product of that two separation factors in the real operation. Irreversible thermodynamics model was set up on the chemical potential considering the coupling interaction of the AbstractPrevious models of equilibrium dissolution-diffusion, pore flow and virtual phase change cannot describe the mass transfer process of pervaporation precisely. The fact that dissolution process on the surface of the membrane does not reach equilibrium is seldom emphasized in the literature. The aim of the present work is to develop the nonequilibrium dissolution-diffusion model (nonequilibrium model) for membrane pervaporation process. In this research, the steps of dissolution and desorption were treated as the pseudo surface reaction processes on the surface based on the hypothesis of nonequilibrium dissolution at the interface of the feed liquid and membrane. The semi-experimental model was set based on steady state mass transfer, ignoring the concentration polarization and adsorption at the permeation side. Through linear fitting of the flux with different thickness of the membrane, the diffusion coefficients and adsorption kinetic rate constants of the model were achieved with equilibrium partition coefficient estimated by UNIFAC-ZM model. The calculated values of the model were well in consistent with experimental flux in the vacuum pervaporation of acetone, butanol and ethanol with polydimethylsiloxane membrane. The nonequilibrium model and its parameters will be further applied for prediction of separation performance and selection of operation conditions.