Pore-diffusion Mechanisms during vapor-phase adsorption
✍ Scribed by Edward J. Nemeth; Edward B. Stuart
- Publisher
- American Institute of Chemical Engineers
- Year
- 1970
- Tongue
- English
- Weight
- 577 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0001-1541
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✦ Synopsis
Abstract
The mechanism of diffusion in an absorbent pore was studied by applying adsorption rate data to the Damköhler equation. Most of the data were taken in the multimolecular region of the nitrogen‐silica gel adsorption isotherm. Vapor‐phase and adsorbed‐phase contributions to the total transport were separated. Vapor‐phase transport increased with temperature and was most dominant at relative pressures of 0.4 to 0.6. Adsorbed‐phase diffusivities were of the order of 10^−2^ — 10^−3^ sq. cm./sec. and showed some dependence on the amount adsorbed at surface coverages greater than 1.5 molecular layers.
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## SYNOPSIS A vapor phase monomer addition method was used to measure the monomer transfer rate into latex particles. The classical mathematical model for the diffusion process was used to calculate the overall mass transfer coefficients of monomer between the vapor and the water phases, and betwe