ISO 10307-2:2009
(Main)Petroleum products — Total sediment in residual fuel oils — Part 2: Determination using standard procedures for ageing
Petroleum products — Total sediment in residual fuel oils — Part 2: Determination using standard procedures for ageing
ISO 10307-2:2009 specifies two procedures — A (thermal) and B (chemical) — for the accelerated ageing of residual fuel oils. When combined with the hot filtration method specified in ISO 10307-1, these procedures permit the prediction of fuel oil stability, as affected by sedimentation, during storage and handling of the fuel oils.
Produits pétroliers — Insolubles existants dans les fuel-oils résiduels — Partie 2: Détermination à l'aide de méthodes de vieillissement de référence
General Information
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 10307-2
Second edition
2009-02-01
Petroleum products — Total sediment in
residual fuel oils —
Part 2:
Determination using standard procedures
for ageing
Produits pétroliers — Insolubles existants dans les fuel-oils résiduels —
Partie 2: Détermination à l'aide de méthodes de vieillissement de
référence
Reference number
ISO 10307-2:2009(E)
©
ISO 2009
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ISO 10307-2:2009(E)
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ISO 10307-2:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 10307-2 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants.
This second edition cancels and replaces the first edition (ISO 10307-2:1993), which has been technically
revised.
ISO 10307 consists of the following parts, under the general title Petroleum products — Total sediment in
residual fuel oils:
— Part 1: Determination by hot filtration
— Part 2: Determination using standard procedures for ageing
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ISO 10307-2:2009(E)
Introduction
Experience has shown that the precipitation of asphaltenes from a residual fuel oil in the form of sediment can
occur during storage and handling. Such sediment can cause severe difficulties, and in extreme cases can
render the fuel unfit for use. Once out of solution, it is extremely difficult to repeptize the asphaltenes into their
original state.
Fuel pre-treatment designed to accelerate the ageing/sedimentation process, followed by filtration, is a well-
established technique for testing whether sediment from residual fuel oils will precipitate during storage and
handling. This could involve thermal ageing (heating to a specified temperature for a specified time) or chemical
ageing (addition of a specified amount of a normal alkane to test whether the balance between the required
aromaticity of the asphaltenes and the available aromaticity of the oil phase is disturbed to the extent that
asphaltene precipitation occurs).
A means of predicting the presence of a reserve of stability to sedimentation in residual fuel oil during storage
and handling is thus a useful tool in the petroleum products industry.
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INTERNATIONAL STANDARD ISO 10307-2:2009(E)
Petroleum products — Total sediment in residual fuel oils —
Part 2:
Determination using standard procedures for ageing
WARNING — The use of this part of ISO 10307 could involve hazardous materials, operations and
equipment. The document does not purport to address all of the safety problems associated with its
use. It is the responsibility of the user of this part of ISO 10307 to establish appropriate safety and
health practices, and determine the applicability of regulatory limitations prior to use.
1Scope
This part of ISO 10307 specifies two procedures — A (thermal) and B (chemical) — for the accelerated ageing
of residual fuel oils. When combined with the hot filtration method specified in ISO 10307-1, these procedures
permit the prediction of fuel oil stability, as affected by sedimentation, during storage and handling of the fuel
oils.
NOTE For the purposes of this International Standard, the terms “% (m/m)” and “% (V/V )” are used to represent mass
and volume fractions of a material, respectively. These expressions are deprecated under the International System and
according to ISO 31-0, Quantities and units — Part 0: General principles, which specifies that mass and volume fractions be
expressed as “mass fraction of xx %” (symbol ω) and “volume fraction of xx %” (symbol ϕ).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
ISO 1773:1997, Laboratory glassware — Narrow-necked boiling flasks
ISO 10307-1:2009, Petroleum products — Total sediment in residual fuel oils — Part 1: Determination by hot
filtration
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
potential total sediment
◦
total sediment, determined by ISO 10307-1, after ageing a sample of residual fuel for 24 h at 100 C under
prescribed conditions
3.2
accelerated total sediment
total sediment, determined by ISO 10307-1, after dilution of a sample of residual fuel with hexadecane in the
◦
ratio of 1ml per 10 g of sample under carefully controlled conditions, followed by storage for 1h at 100 C
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ISO 10307-2:2009(E)
4Principle
4.1 General
The total sediment is determined after accelerated ageing in accordance with either 4.2 or 4.3, followed by hot
filtration in accordance with ISO 10307-1. The ageing is carried out in duplicate (see Note to 8.1).
4.2 Thermal ageing (Procedure A)
◦
A sample of residual fuel oil is subject to ageing at 100 C for 24 h under specified conditions.
4.3 Chemical ageing (Procedure B)
A sample of residual fuel oil is diluted with a specified amount of hexadecane (cetane) under carefully controlled
◦
conditions. It is then heated to 100 C for 1h.
5 Apparatus
5.1 Ageing bath, comprising an electrically heated oil bath, capable of maintaining a temperature of
◦ ◦
100 C± 0,5 C, fitted with air wells of inner dimension 55 mm and depth 120 mm, as illustrated in Figure 1.
5.2 Ageing bath temperature-measuring device, capable of measuring the temperature in the range from
◦ ◦ ◦
to with an accuracy of (see Figure 1).
95 C 103 C 0,5 C
5.3 General-purpose temperature-measuring device, capable of measuring the temperature in the range
◦ ◦ ◦
from 0 C to 100 C with an accuracy of 0,5 C.
5.4 Air condenser, glass, of outer diameter 8mm and length 400 mm.
NOTE The air condenser preferably matches the conical flask (5.9). Alternatively, the air condenser can be attached by
means of a cork, bored to accommodate the air condenser.
5.5 Stoppers, to provide a tight fit in the test jar.
5.6 Microburette, of minimum capacity 5ml, graduated in 0,02 ml subdivisions or less.
5.7 Magnetic stirrer/hotplate, capable of being controlled by a surface-temperature
...
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