Showing papers by "Ralph T. Yang published in 1988"
TL;DR: Extension de l'equation de Dubinin-Astakhov au calcul du volume d'adsorption d'un melange gazeux sur un materiau poreux.
Abstract: Extension de l'equation de Dubinin-Astakhov au calcul du volume d'adsorption d'un melange gazeux sur un materiau poreux
42 citations
TL;DR: In this article, the authors studied monolayer channeling on the basal plane of graphite for the Ru-catalyzed CH2 reaction (producing CH4) and showed that the contribution of monlayer channeling to the overall carbon gasification rate is at least as important as that by deep layer channeling.
41 citations
TL;DR: In this article, a new catalyst action in catalyzed graphite hydrogenation, termed tunneling, was observed and studied for Pt, Ni, and Ru, where the metal particles undergo tunneling in a direction of graphite (parallel to the basal plane), gasifying carbon.
28 citations
TL;DR: In this article, the authors compare three modeles (equilibre, force d'entrainement lineaire, and diffusion de pore) to determine des courbes de rupture.
Abstract: Etude experimentale de l'adsorption de l'oxygene et de l'azote sur une zeolite 4A tamis moleculaire. Determination des courbes de rupture. Trois modeles mathematiques (equilibre, force d'entrainement lineaire et diffusion de pore) sont compares
10 citations
TL;DR: Une boite noire is utilisee for convertir le procede physique complexe en un simple probleme mathematique as mentioned in this paper, and two exemples illustrent la simplicite et la complexite du modele.
Abstract: Une boite noire est utilisee pour convertir le procede physique complexe en un simple probleme mathematique Trois exemples illustrent la simplicite et la complexite du modele
9 citations
TL;DR: In this article, a vacuum pressure swing adsorption cycle is used to produce high purity hydrogen from a hydrogen-lean binary mixture (20/80 H2/CO) using zeolite 5A as the sorbent.
Abstract: High-purity hydrogen is commercially produced by pressure swing adsorption from hydrogen-rich mixtures. In this work, a vacuum pressure swing adsorption cycle is used to produce high purity hydrogen from a hydrogen-lean binary mixture (20/80 H2/CO) using zeolite 5A as the sorbent. The effects of different process variables on separation performance have been studied. The purity of hydrogen product increases at low throughput, high feed pressure, high end pressure of cocurrent depressurization, low end pressure of countercurrent evacuation, and short cycle time. Also, it was found that for a H2-lean mixture, the separation is improved at higher ambient temperature. In addition, a new “vacuum purge” step was found to improve the separation and is therefore a promising step for commercial application.
6 citations