ASTM D5154-91
(Test Method)Standard Test Method for Determining the Activity and Selectivity of Fluid Catalytic Cracking (FCC) Catalysts by Microactivity Test (Withdrawn 2000)
Standard Test Method for Determining the Activity and Selectivity of Fluid Catalytic Cracking (FCC) Catalysts by Microactivity Test (Withdrawn 2000)
SCOPE
1.1 This test method covers determining the activity and selectivity of either equilibrium or laboratory deactivated fluid catalytic cracking (FCC) catalysts. The activity is evaluated on the basis of weight percent conversion of gas oil in a microactivity unit. The selectivities are evaluated on the basis of weight percent yields of specifically defined products resulting from the catalytic cracking of gas oil.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only.
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
ASTM D5154 7L W 0759530 0500793 4 W
AMERICAN SOCIEPI FOR TESTING AND MATERIALS
Designation: D 5154 - 91
1916 Race St. Philadelphla, Pa 19103
4Tb
Reprinted from the Annual Eook of ASTM Standards. Copyright ASTM
If not listed in the current combined index, will appear in the next editlon,
Standard Test Method for
Determining the Activity and Selectivity of Fluid Catalytic
Cracking (FCC) Catalysts by Microactivity Test'
This standard is issued under the fixed designation D 5 154; the number immediately following the designation indicates the year of
original adoption or, in the we 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 laboratories. Each catalyst has a consensus mean conversion
value assigned to it by Committee D-32. Samples of the
1,1 This test method covers determining the activity and
ASTM reference catalysts can be obtained through NET.
selectivity of either equilibrium or laboratory deactivated
3.3 Measured Conversion-calculated as the difference
fluid catalytic cracking (FCC) catalysts. The activity is
between the weight of feed used and the weight of
evaluated on the basis of weight percent conversion of gas oil
unconverted material divided by the weight of feed used
in a microactivity unit. The selectivities are evaluated on the
times 100%. The unconverted material is defined as ali
basis of weight percent yields of specifically defined products
liquid product with a boiling point above 2 16°C (42 i OF).
resulting from the catalytic cracking of gas oil.
3.4 Activity-calculated as conversion divided by the
1.2 The values stated in SI units are to be regarded as
difference of 100 minus conversion.
standard. The values given in parentheses are provided for
3.5 Cata/yst/Oil (C/O) Ratio-the weight of catalyst used
information only.
in the test divided by the weight of feed fed to the reactor, In
1.3 This standard does not purport to address all of the
practice, the weight of catalyst is usually maintained at a
safety problems, if any, associated with. its use. It is the
constant value and the total weight of feed is varied.
of the user of this standard to establish appro-
responsibility
3.6 Weight Hourly Space Velocity (WHSV-the oil feed
priate safety and health practices and determine the applica-
rate in grams per hour divided by the weight of catalyst in
bility of regulatory limitations prior to use.
grams. Units are hr-'.
2. Referenced Documents 3.7 Reaction Severity-an indication of the severity of the
cracking reaction which allows a range of conversions to be
2.1 ASTM Standards:
obtained from any particular catalyst without changing
D2887 Test Method for Boiling Range Distribution of
reactor temperature. Changing reaction severity is achieved
Petroleum Fractions by Gas Chromatography2
by changing WHSV or C/O ratio or both.
D3907 Method for Testing Fluid Cracking Catalysts by
3.8 Contact time-in seconds is calculated as 3600/
Microactivity Test3
(WHSV * C/O). This is the delivery time during which feed
D4463 Test Method for Steam Deactivation of Fresh
is introduced to the reactor.
Fluid Cracking Catalysts3
3.9 Product Yield-one hundred times the weight of a
E 105 Practice for Probability Sampling of Materials4
specific product divided by the weight of feed used in the test.
E 177 Practice for Use of the Terms Precision and Bias in
3.10 Normalized Product Yield-the result obtained when
ASTM Test Methods4
each product yield has been corrected for non-perfect weight
E 456 Terminology Relating to Quality and Statistics4
balances. For a run to be judged acceptable, the total
E 69 1 Practice for Conducting an Interlaboratory Study to
recovery, wt % of feed, should be in the range of 96 to 101 %
Determine the Precision of a Test Method4
(see 10.2). If the recovery is outside this range the test data
should be discarded.
3. Terminology
3.1 1 LCO-the light cycle oil product defined to have a
3.1 Description of Terms:
boiling point range of 216-343°C (421-650°F).
3.1.1 ASTM Standard Feed-a specific batch of gas oil
3.12 HCO-the heavy cycle oil product defined to have a
that is used as feedstock in the described test method. This
minimum boiling point of 343°C (650°F).
standard feed can be obtained through the National Institute
of Standards and Technology (NIST) (formerly the National
4. Summary of Test Method
Bureau of Standards) in Gaithersburg, MD, 20899.
4.1 At least two samples of FCC catalysts, one of which is
3.2 ASTM Reference Catalysts-a set of equilibrium FCC
chosen as a reference, are separately contacted with gas oil
catalysts within the useful range of this test method is used to
(ASTM Standard Feed or other suitable feedstock) in a fixed
improve the reproducibility of test results between different
bed reactor at a specified reaction zone t
...
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