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ASTM D524-15
Standard Test Method for Ramsbottom Carbon Residue of Petroleum Products
Automaticky přeložený název:
Standardní zkušební metoda pro Ramsbottom Carbon zbytek ropných produktů
NORMA vydána dne 1.6.2015
Informace o normě:
Označení normy: ASTM D524-15
Poznámka: NEPLATNÁ
Datum vydání normy: 1.6.2015
Kód zboží: NS-591132
Počet stran: 9
Přibližná hmotnost: 27 g (0.06 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D524-15 :
Keywords:
carbon residue, petroleum products, Ramsbottom,, ICS Number Code 75.080 (Petroleum products in general)
Doplňující informace
| Significance and Use | ||||||||||||||||||||||
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5.1 The carbon residue value of burner fuel serves as a rough approximation of the tendency of the fuel to form deposits in vaporizing pot-type and sleeve-type burners. Similarly, provided alkyl nitrates are absent (or if present, provided the test is performed on the base fuel without additive) the carbon residue of diesel fuel correlates approximately with combustion chamber deposits. 5.2 The carbon residue value of motor oil, while at one time regarded as indicative of the amount of carbonaceous deposits a motor oil would form in the combustion chamber of an engine, is now considered to be of doubtful significance due to the presence of additives in many oils. For example, an ash-forming detergent additive can increase the carbon residue value of an oil yet will generally reduce its tendency to form deposits. 5.3 The carbon residue value of gas oil is useful as a guide in the manufacture of gas from gas oil, while carbon residue values of crude oil residuum, cylinder and bright stocks, are useful in the manufacture of lubricants. |
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| 1. Scope | ||||||||||||||||||||||
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1.1 This test method covers the determination of the amount of carbon residue (Note 1) left after evaporation and pyrolysis of an oil, and it is intended to provide some indication of relative coke-forming propensity. This test method is generally applicable to relatively nonvolatile petroleum products which partially decompose on distillation at atmospheric pressure. This test method also covers the determination of carbon residue on 10 % (V/V) distillation residues (see Section 10). Petroleum products containing ash-forming constituents as determined by Test Method D482, will have an erroneously high carbon residue, depending upon the amount of ash formed (Notes 2 and 3). Note 1: The term carbon residue is used throughout this
test method to designate the carbonaceous residue formed during
evaporation and pyrolysis of a petroleum product. The residue is
not composed entirely of carbon, but is a coke which can be further
changed by pyrolysis. The term carbon residue is continued in this test
method only in deference to its wide common usage.
Note 2: Values obtained by this test method are not
numerically the same as those obtained by Test Method D189, or Test Method D4530. Approximate correlations have been
derived (see Fig. X2.1) but
need not apply to all materials which can be tested because the
carbon residue test is applicable to a wide variety of petroleum
products. The Ramsbottom Carbon Residue test method is limited to
those samples that are mobile below 90 °C.
Note 3: In diesel fuel, the presence of alkyl nitrates such as
amyl nitrate, hexyl nitrate, or octyl nitrate, causes a higher
carbon residue value than observed in untreated fuel, which can
lead to erroneous conclusions as to the coke-forming propensity of
the fuel. The presence of alkyl nitrate in the fuel can be detected
by Test Method D4046.
Note 4: The test procedure in Section 10 is being modified to allow the use of
a 100 mL volume automated distillation apparatus. No precision data
is available for the procedure at this time, but a round robin is
being planned to develop precision data. The 250 mL volume bulb
distillation method described in Section 10 for determining carbon residue on a
10 % distillation residue is considered the referee
test.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 1.4 This standard does not purport to address all of the safety concerns, 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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| 2. Referenced Documents | ||||||||||||||||||||||
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