ASTM D3766-08

Standard Terminology Relating to Catalysts and Catalysis

SCOPE
1.1 This terminology covers definitions of terms related to catalysts and catalysis.
Note 1—The Manual of Symbols and Terminology for Physicochemical Quantities and Units presents authoritative descriptions of many terms used in the field of catalysis.

General Information

• Status: Historical
• Publication Date: 31-Mar-2008
• ICS: 01.040.71 - Chemical technology (Vocabularies)
• ICS: 71.040.30 - Chemical reagents
• Technical Committee: D32 - Catalysts
• Drafting Committee: D32.92 - Nomenclature and Definitions

Relations

• Replaces: ASTM D3766-86(2007) - Standard Terminology Relating to Catalysts and Catalysis
• Effective Date: 01-Apr-2008
• Replaced By: ASTM D3766-08(2013) - Standard Terminology Relating to Catalysts and Catalysis
• Effective Date: 01-Mar-2013
• Referred By: ASTM D4699-03(2018)e1 - Standard Test Method for Vibratory Packing Density of Large Formed Catalyst and Catalyst Carrier Particles
• Effective Date: 01-Apr-2008
• Referred By: ASTM D4222-20 - Standard Test Method for Determination of Nitrogen Adsorption and Desorption Isotherms of Catalysts and Catalyst Carriers by Static Volumetric Measurements
• Effective Date: 01-Apr-2008
• Referred By: ASTM D4567-19 - Standard Test Method for Single-Point Determination of Specific Surface Area of Catalysts and Catalyst Carriers Using Nitrogen Adsorption by Continuous Flow Method
• Effective Date: 01-Apr-2008
• Referred By: ASTM C1770-21 - Standard Test Method for Determination of Loose and Tapped Bulk Densities of Small Quantities of Plutonium Oxide
• Effective Date: 01-Apr-2008
• Referred By: ASTM D3663-20 - Standard Test Method for Surface Area of Catalysts and Catalyst Carriers
• Effective Date: 01-Apr-2008
• Referred By: ASTM D4180-13(2018) - Standard Test Method for Vibratory Packing Density of Formed Catalyst Particles and Catalyst Carriers
• Effective Date: 01-Apr-2008
• Referred By: ASTM D8353-20 - Standard Guide for Determination of Individual Particle Strength of Low Surface Area Catalysts and Catalyst Carriers by Drop Test onto a Steel Plate
• Effective Date: 01-Apr-2008
• Referred By: ASTM D4780-12(2017)e1 - Standard Test Method for Determination of Low Surface Area of Catalysts and Catalyst Carriers by Multipoint Krypton Adsorption
• Effective Date: 01-Apr-2008
• Referred By: ASTM D4164-13(2018) - Standard Test Method for Mechanically Tapped Packing Density of Formed Catalyst and Catalyst Carriers
• Effective Date: 01-Apr-2008
• Referred By: ASTM D7442-22 - Standard Practice for Sample Preparation of Fluid Catalytic Cracking Catalysts, Catalytic Materials, and Zeolites for Elemental Analysis by Inductively Coupled Plasma Optical Emission Spectroscopy
• Effective Date: 01-Apr-2008
• Referred By: ASTM D4512-22 - Standard Test Method for Vibrated Apparent Packing Density of Fine Catalyst and Catalyst Carrier Particles and Powder
• Effective Date: 01-Apr-2008
• Referred By: ASTM D6175-03(2019) - Standard Test Method for Radial Crush Strength of Extruded Catalyst and Catalyst Carrier Particles
• Effective Date: 01-Apr-2008
• Referred By: ASTM D7084-18 - Standard Test Method for Determination of Bulk Crush Strength of Catalysts and Catalyst Carriers
• Effective Date: 01-Apr-2008

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 − 08
StandardTerminology Relating to
1
Catalysts and Catalysis
This standard is issued under the fixed designation D3766; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope density, packing (bulk), n—the ratio of the mass of a
collection of discrete pieces of solid material to the sum of
1.1 This terminology covers definitions of terms related to
the volumes of: the solids in each piece, the voids within the
catalysts and catalysis.
pieces, and the voids among the pieces of the particular
NOTE 1—The Manual of Symbols and Terminology for Physicochemi-
collection.
cal Quantities and Units presents authoritative descriptions of many terms
2
used in the field of catalysis.
density, particle (envelope), n—the ratio of the mass of a
particle to the sum of the volumes of: the solid in each piece
2. Terminology
and the voids within each piece, that is, within close-fitting
2.1 Definitions: imaginary envelopes completely surrounding each piece.
activity, n—of a catalyst, the measure of the rate of a specific
density, skeletal, n—the ratio of the mass of discrete pieces of
catalytic reaction conducted in the presence of a catalyst.
solid material to the sum of the volumes of: the solid
calcine, v—in catalysis,toheatamaterialtoahightemperature
material in the pieces and closed (or blind) pores within the
causing a physical or chemical change, for example, loss of
pieces.
moisture and volatile matter, or a phase change, or both.
density, theoretical, n—the ratio of the mass of a collection of
catalyst bed support, n—an essentially inert plate, grid,
discrete pieces of solid material to the sum of the volumes of
particulate bed, or other structural component designed to
said pieces, the solid material having an ideal regular
hold up or bear a quantity of catalyst in a catalytic reactor.
arrangement at the atomic level.
catalyst carrier, n—asolid,generallyporousmaterialuponthe
envelope, n—of a particle in catalysis, a theoretical surface
surface or into the voids of which catalytic materials are
that encloses the particle and that bridges openings to the
placed to create the desired catalyst.
interior of the particle.
DISCUSSION—A carrier may have or contribute to catalytic activity.
pore, n—in catalysis, a small opening in a material permitting
catalyst substrate, n—less preferred alternative term for cata-
admission, adsorption, or passage of a fluid.
lyst carrier.
pore size distribution, n—in catalysis, the volume of pores of
catalyst support, n—less preferred alternative term for catalyst
a material expressed or displayed as a function of pore
carrier.
diameters.
crush strength, n—in catal
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D3766–86 (Reapproved 2007) Designation: D 3766 – 08
Standard Terminology Relating to
1
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
1.1 This terminology covers definitions of terms related to catalysts and catalysis.
NOTE 1—The Manual of Symbols and Terminology for Physicochemical Quantities and Units presents authoritative descriptions of many terms used
2
in the field of catalysis.
2. Terminology
2.1 Definitions:
activityactivity, n—of a catalyst, the measure of the rate of a specific catalytic reaction conducted in the presence of a catalyst.
catalyst bed supportcalcine, v—in catalysis, to heat a material to a high temperature causing a physical or chemical change, for
example, loss of moisture and volatile matter, or a phase change, or both.
catalyst bed support, n—an essentially inert plate, grid, particulate bed, or other structural component designed to hold up or bear
a quantity of catalyst in a catalytic reactor.
catalystcarriercatalystcarrier, n—asolid,generallyporousmaterialuponthesurfaceorintothevoidsofwhichcatalyticmaterials
are placed to create the desired catalyst.
DISCUSSION—A carrier may have or contribute to catalytic activity.
catalyst substratecatalyst substrate, n—less preferred alternative term for catalyst carrier. catalyst carrier .
catalyst support— less preferred alternative term for catalyst carrier. catalyst support, n—less preferred alternative term for
catalyst carrier .
crush strength, n—in catalysis , a measure of the resistance of a single particle of a formed catalystformed catalysts or catalyst
carriers, either singly or in bulk, to loss of form when subjected to a compressive force.
DISCUSSION—Formed catalysts may include tablets, spheres, extrudates, rings, pellets, etc. and should be distinguished from powders and granules.
density, packing (bulk)density, packing (bulk), n—the ratio of the mass of a collection of discrete pieces of solid material to the
sum of the volumes of: the solids in each piece, the voids within the pieces, and the voids among the pieces of the particular
collection.
density, particle (envelope)density, particle (envelope), n—the ratio of the mass of a particle to the sum of the volumes of: the
solidineachpieceandthevoidswithineachpiece,thatis,withinclose-fittingimaginaryenvelopescompletelysurroundingeach
piece.
density, skeletaldensity, skeletal, n—the ratio of the mass of discrete pieces of solid material to the sum of the volumes of: the
solid material in the pieces and closed (or blind) pores within the pieces.
density, theoreticaldensity, theoretical, n—the ratio of the mass of a collection of discrete pieces of solid material to the sum of
the volumes of said pieces, the solid materia
...