ASTM D3766-86(2002)
(Terminology)Standard Terminology Relating to Catalysts and Catalysis
Standard Terminology Relating to Catalysts and Catalysis
SCOPE
1.1 This terminology contains definitions of terms and descriptions of terms related to catalysts and catalysis.
Note 1—"The Manual of Symbols and Terminology for Physicochemical Quantities and Units-Appendix II. Definitions, Terminology and Symbols in Colloid and Surface Chemistry. Part II: Heterogeneous Catalysis," Pure and Applied Chemistry, Vol 46, No. 1, 73-90(1976). This document presents authoritative descriptions of many terms used in the field of catalysis.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D3766–86 (Reapproved 2002)
Standard Terminology Relating to
Catalysts and Catalysis
This standard is issued under the fixed designation D 3766; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope of discrete pieces of solid material to the sum of the volumes
of: the solids in each piece, the voids within the pieces, and
1.1 This terminology contains definitions of terms related to
the voids among the pieces of the particular collection.
catalysts and catalysis.
density, particle (envelope)—the ratio of the mass of a
NOTE 1—The Manual of Symbols and Terminology for Physicochemi-
particle to the sum of the volumes of: the solid in each piece
cal Quantities and Units presents authoritative descriptions of many terms
and the voids within each piece, that is, within close-fitting
used in the field of catalysis.
imaginary envelopes completely surrounding each piece.
density, skeletal—the ratio of the mass of discrete pieces of
2. Definitions
solid material to the sum of the volumes of: the solid
activity—of a catalyst, the measure of the rate of a specific
material in the pieces and closed (or blind) pores within the
catalytic reaction conducted in the presence of a catalyst.
pieces.
catalyst bed support—an essentially inert plate, grid, particu-
density, theoretical—the ratio of the mass of a collection of
late bed, or other structural component designed to hold up
discrete pieces of solid material to the sum of the volumes of
or bear a quantity of catalyst in a catalytic reactor.
said pieces, the solid material having an ideal regular
catalyst carrier—a solid, generally porous material upon the
arrangement at the atomic level.
surface or into the voids of which catalytic materials are
envelope—of a particle in catalysis, a theoretical surface that
placed to create the desired catalyst.
encloses the particle and that bridges openings to the interior
of the particle.
DISCUSSION—A carrier may have or contribute to catalytic activity.
pore—in catalysis, a small opening in a material permitting
catalyst substrate—less preferred alternative term for catalyst
admission, adsorption, or passage of a fluid.
carrier.
pore size distribution—in catalysis, the volume of pores of a
catalyst support—less preferred alternative term for catalyst
material expressed or displayed as a function of pore
carrier.
diameters.
crush strength, n—in catalysis, a measure of the resistance of
pore volume distribution—in catalysis, an alternative term
a single particle of a formed catalyst to loss of form when
for pore size distribution.
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.