1968
DOI: 10.1139/v68-643
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Diffusive and convective flow in a hydrogen-atom flow system

Abstract: Diffusive and convective flow was studied in a hydrogen-atom flow system using an isothermal calorimetric detector. By varying detector area, total pressure, and linear flow rate, the importance of axial diffusion in the system was investigated. Under conditions of predominantly diffusive flow, signal-distance plots were independent of flow rate. When convective flow predominated, concentration-time plots were independent of flow rate. The efficiency of a detector was clearly dependent o n its surface area wit… Show more

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“…The criteria for efficient mixing have received some attention (4,9,12), but the effect on the use of homogeneous reactors of the homogeneous atom sink represented by the excess reactant has been largely neglected in this higher pressure region. On the other hand, there are several theoretical and experimental evaluations of the relative importance of diffusive and convective mass transport in conventional flow systems operated at pressures of a few Torr (1 Torr = 133.3 Pa) and containing both homogeneous and localized heterogeneous atom sinks (16)(17)(18)(19)(20).…”
Section: Introductionmentioning
confidence: 99%
“…The criteria for efficient mixing have received some attention (4,9,12), but the effect on the use of homogeneous reactors of the homogeneous atom sink represented by the excess reactant has been largely neglected in this higher pressure region. On the other hand, there are several theoretical and experimental evaluations of the relative importance of diffusive and convective mass transport in conventional flow systems operated at pressures of a few Torr (1 Torr = 133.3 Pa) and containing both homogeneous and localized heterogeneous atom sinks (16)(17)(18)(19)(20).…”
Section: Introductionmentioning
confidence: 99%