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Evaporation rates and surface profiles on heterogeneous surfaces with mass transfer and surface reaction

Journal Article:

Abstract

Simple models incorporating surface reaction and diffusion of volatile products through a boundary layer are developed to calculate effective rates of evaporation and local surface profiles on surfaces having active and inactive regions. The coupling between surface heterogeneities with respect to a particular reaction and external mass transfer may provide a mechanism for the surface rearrangement and metal loss encountered in several catalytic systems of practical interest. Calculated transport rates for the volatilization of platinum in oxidizing environments and the rearrangement of this metal during the ammonia oxidation reaction agree well with published experimental data.
Publication Date:
Jan 01, 1979
Product Type:
Journal Article
Reference Number:
EDB-84-130908
Resource Relation:
Journal Name: Chem. Eng. Sci.; (United Kingdom); Journal Volume: 34:3
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AMMONIA; OXIDATION; PLATINUM; CATALYTIC EFFECTS; SURFACE PROPERTIES; VOLATILE MATTER; DIFFUSION; BOUNDARY LAYERS; CATALYSIS; CHEMICAL ANALYSIS; EVAPORATION; MASS TRANSFER; MATHEMATICAL MODELS; REACTION KINETICS; CHEMICAL REACTIONS; ELEMENTS; HYDRIDES; HYDROGEN COMPOUNDS; KINETICS; LAYERS; MATTER; METALS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; PHASE TRANSFORMATIONS; PLATINUM METALS; TRANSITION ELEMENTS; 400201* - Chemical & Physicochemical Properties
OSTI ID:
6697246
Research Organizations:
Univ. of Minnesota
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: CESCA
Submitting Site:
HEDB
Size:
Pages: 365-372
Announcement Date:

Journal Article:

Citation Formats

Flytzani-Stephanopoulos, M, and Schmidt, L D. Evaporation rates and surface profiles on heterogeneous surfaces with mass transfer and surface reaction. United Kingdom: N. p., 1979. Web.
Flytzani-Stephanopoulos, M, & Schmidt, L D. Evaporation rates and surface profiles on heterogeneous surfaces with mass transfer and surface reaction. United Kingdom.
Flytzani-Stephanopoulos, M, and Schmidt, L D. 1979. "Evaporation rates and surface profiles on heterogeneous surfaces with mass transfer and surface reaction." United Kingdom.
@misc{etde_6697246,
title = {Evaporation rates and surface profiles on heterogeneous surfaces with mass transfer and surface reaction}
author = {Flytzani-Stephanopoulos, M, and Schmidt, L D}
abstractNote = {Simple models incorporating surface reaction and diffusion of volatile products through a boundary layer are developed to calculate effective rates of evaporation and local surface profiles on surfaces having active and inactive regions. The coupling between surface heterogeneities with respect to a particular reaction and external mass transfer may provide a mechanism for the surface rearrangement and metal loss encountered in several catalytic systems of practical interest. Calculated transport rates for the volatilization of platinum in oxidizing environments and the rearrangement of this metal during the ammonia oxidation reaction agree well with published experimental data.}
journal = {Chem. Eng. Sci.; (United Kingdom)}
volume = {34:3}
journal type = {AC}
place = {United Kingdom}
year = {1979}
month = {Jan}
}