methanestorageviahydrateformationusingcalciumhypochloriteasadditive

At present, natural gas accounts for 3% of the total energy consumption in China. It will go up to 5% in 2005 and 8% in 2010. Natural gas storage is a subject of great interest to many industries and particularly to transportation. Compressed natural gas, liquefied natural gas and adsorbed natural gas are techniques widely used. The possibility of developing a convenient storage system based on hydrate has been explored for about ten years around the world. Gudmundsson has focused on the storage and transportation of gas as hydrate at atmospheric pressure since 1990. Khokhar used 1, 3 - dimethylcyclohexane and polyvinyl-pyrrolidone as additives to lower hydrate formation pressure. Saito surveyed the effects of tetrahydrofuran and acetone. Rogers used sodium dodecyl sulfate as accelerator to natural gas hydrate formation

phasediagrampredictionofsystemsmnno32mno3nh2omcamgandliwithmodifiedbetmodel

BET-model parameters for the binary system Mn(NO3 )2-H2 O were obtained by fitting experimental water activities at 298.15 K. The values obtained in this work were compared to those fitted previously for the systems Ca(NO3)2-H2O and Zn(NO3)2-H2O, showing reasonable agreement. With the model parameters fitted at 298 K,the vapor pressure of the saturated solution for the phases Mn(NO3 )2 · 6 H2 O and Mn(NO3 )2 · 4 H2 O were predicted and shows quite good agreement with the experimental values. The phase diagram of the Mn(NO2 )2-H2O system reproduced by the BET model shows smaller deviation from the experimental data than that by the extended UNIQUAC model. The ternary phase diagrams of the systems Me(NO3)n-Mn(NO3)2-H2O (Me= Mg, Ca and Li) are predicted with the binary model parameter and compared with available experimental data. The predicted eutectic compositions were given as possible heat storage materials