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Wet carbon-based solid acid/NaNO_3 as a mild and efficient reagent for nitration of aromatic compound under solvent free conditions

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Chinese Chemical Letters 2007年第9期18卷 1064-1066页

作者： Arash Shokrolahi Abbas Zali Mohammad Hossein Keshavarz Chemistry Department Malek-ashtar University of TechnologyShahin-shahrP.O.Box 83145-115Iran

Nitro aromatic compound can be obtained in high yields via nitration of aromatic compound with wet carbon-based solid acid and NaNO_3 under solvent free oxidation at room temperature.

关键词： Carbon-based solid acid sodium nitrate Nitration Solvent free conditions

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Ab-initio Investigation on Ion-associated Species and Association Process in NaNO_3 Solution

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Chemical Research in Chinese Universities 2010年第4期26卷 656-661页

作者： ZHANG Hao FENG Bo YU Jian-kang SUN Chia-chung State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical Chemistry Jilin University Changchun 130021 P. R. China Institute of Condensed State Physics Jilin Normal University Siping 136000 P. R. China

Some ion-associated species existed possibly in NaNO3 solution were investigated via the ab-initio method. The hydrated ion parings, triple and multiple ion clusters in NaNO3 solution are all analogous to those in Mg（NO3）2 system except that the bi-dentate structures can not be formed. Only one solvent-shared ion paring has larger v1-NO3^- frequency than the hydrated NO3^- ion. And all triple clusters with two hydrated Na^＋ ions and one NO3^- have larger v1-NO3^- frequency than the hydrated NO3^- ion. The ion association process in NaNO3 solution is predicted as free ions→solvent-separated ion pairings→solvent-shared ion pairings→solvent-shared triple ion clusters→contact triple ion clusters→contact multiple ion clusters→amorphous NaNO3, which is not analogous to that in MgSO4 but those in Mg（NO3）2 and Mg（ClO4）2 systems.

关键词： Quantum chemistry sodium nitrate Ion-associated species Association process

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Influence of the Fin Design on the Melting and Solidification Process of NANO3 in a Thermal Energy Storage System

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Journal of Energy and Power Engineering 2015年第11期9卷 913-928页

作者： Heimo Walter Anton Beck Michael Hameter Institute for Energy Systems and Thermodynamics Vienna University of Technology Vienna A-1060 Austria

The melting and solidification process of sodium nitrate, which is used as energy storage material, is studied in a vertical arranged energy storage device with two different bimetal finned tube designs （with and without additional lateral fins） for enhancing the heat transfer. The finned tube design consists of a plain steel tube while the material for the longitudinal （axial） fins is aluminum. The investigation analyses the influence of the lateral fins on the charging and discharging process. Three-dimensional transient numerical simulations are performed using the ANSYS Fluent 14.5 software. The results show that, every obstruction given by lateral fins reduces the melting and solidification velocity in direction to the outer shell.

关键词： Thermal energy storage latent heat sodium nitrate numerical simulation fin design.

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