Intraparticle Gaseous Diffusion through Coke and Its Pulvelization during Oxidation with Carbon Dioxide

Phenanthrene and pyrene sorption and intraparticle diffusion in polyoxymethylene, coke, and activated carbon.

We report sorption isotherms and uptake kinetics for phenanthrene and pyrene with three organic model sorbents: polyoxymethylene (POM), coke, and activated carbon. We combine batch equilibration and kinetic experiments with the direct observation of the long-term diffusion of phenanthrene and pyrene as measured within cross-sectioned particles using microprobe laser-desorption laser-ionization ...

Carbon Dioxide Diffusion inside Leaves

Leaves are beautifully specialized organs that enable plants to intercept light necessary for photosynthesis. The light is dispersed among a large array of chloroplasts that are in close proximity to air and yet not too far from vascular tissue, which supplies water and exports sugars and other metabolites. To control water loss from the leaf, gas exchange occurs through pores in the leaf surfa...

A Counter-Current Gaseous Diffusion Model of Oxidation through a Porous Coating

Thermal Gaseous Diffusion Diffusion Method Through Barriers 3 Centrifugal 1

INTRODUCTION Fig. I i'only one of the various possible systematic arrangements of the elements that occur in nature, or have recently been produced. The elements are arranged i n order o f increasing atornir number. indicated by the fignre immediately below the sytnbol of each element. Nuclear physiriqts th ink of tlie atornic number Z as the runnber of positively charpcl particles. called prot...

Carbon dioxide transport through membranes.

Several membrane channels, like aquaporin-1 (AQP1) and the RhAG protein of the rhesus complex, were hypothesized to be of physiological relevance for CO(2) transport. However, the underlying assumption that the lipid matrix imposes a significant barrier to CO(2) diffusion was never confirmed experimentally. Here we have monitored transmembrane CO(2) flux (J(CO2)) by imposing a CO(2) concentrati...