26 Dec '15, 4pm

[email protected] team scales up ammonia borane slurry for on-board #H2 storage for automotive applications

.@PNNL team scales up ammonia borane slurry for on-board #H2 storage for automotive applications

To develop a new method to produce high solid loading AB slurries, we established a process to produce large volumes up to 1 L of slurry. … Two major challenges existed in producing both high loading and large volumes: (1) It is common knowledge that the high-energy tip-sonication process used in slurry production results in localized temperature gradients. Without proper cooling these localized gradients could produce a cascade thermal reaction resulting in a rapid exothermic reaction. (2) In addition to regulating the process temperature, providing adequate mixing is also as essential. It has been observed that AB readily absorbs silicone fluid up to 50% of its mass. As with many slurries, increasing the solids content increases the viscosity exponentially. While AB slurries are shear-thinning, the yield stress is quite high and common laboratory mixing methods proved un...

Full article: http://www.greencarcongress.com/2015/12/20151226-pnnl.html

Tweets

Two Hours Per Team and the 3 Stages of #Agile C...

dannorth.net 26 Dec '15, 7am

For instance every team should have their code in a source control system, be writing tests and have CI, there is simply n...