Thermodynamic aspect of sulfur, polysulfide anion and lithium polysulfide: plausible reaction path during discharge of lithium–sulfur battery

The discharge voltage of reactions for formation of Li2Sn from S8 is higher than that for formation of Li2S from Li2Sn.

A way to increase safety in marine refrigeration when using ammonia as a working agent

Trade with perishables, especially food, has always been a successful business, marine refrigeration being a vital part of the specific international trade since it can cause economic losses and environmental fatalities. This paper analysis the possibility of decreasing the amount of R717 by mixing it with dimethyleter (DME). Two mixtures (20% DME, 80% R717) and (40% DME, 60% R717) are compared with pure ammonia, based on the fulfillment of the selection criteria of a refrigerant. The comparison will reveal the fact that the first mentioned mixture satisfies in a more convenient way these criteria, replacement of R717 with this mixture being a good option in improving safety, by not affecting the thermodynamic aspect of the problem, or its environmental aspect.