GB 18350-2013/XG1-2016+XG2-2020 Denatured fuel ethanol
1 Scope
This standard specifies the terms and definitions, requirements, test methods, inspection rules, and marking, packaging, transportation and storage of denatured fuel ethanol.
This standard is applicable to fuel ethanol that is produced from starchy, saccharide, cellulosic, and other raw materials through fermentation, distillation, and dehydration, and then denatured by addition of a denaturant.
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.
GB 190 Packing symbol of dangerous goods
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 601 Chemical reagent - Preparations of standard volumetric solutions
GB/T 602 Chemical reagent - Preparations of standard solutions for impurity
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods
GB/T 611-2006 Chemical reagent - General method for the determination of density
GB/T 683 Chemical reagent - Methanol
GB/T 4472 Determination of density and relative density for chemical products
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 8019 Standard test method for gum content in fuels by jet evaporation
GB/T 9722 Chemical reagent - General rules for the gas chromatography
GB/T 9724 Chemical reagent - General rule for the determination of pH
GB/T 9725-2007 Chemical reagent - General rule for potentiometric titration
GB 18351 Ethanol gasoline for motor vehicles (E10)
GB/T 22030 Blendstocks of ethanol gasoline for motor vehicles
GB 50016 Code of design on building fire protection and prevention
GB 50074 Code for design of oil depot
SH/T 0253 Determination of total sulfur content in light petroleum products (coulometric method)
SH/T 0689 Standard test method for determination of total sulfur in light hydrocarbons, motor fuels and oils by ultraviolet fluorescence
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
fuel ethanol
ethanol intended for use as fuel without addition of denaturant
3.2
denaturant
blendstock of ethanol gasoline for motor vehicles or ethanol gasoline for motor vehicles added into fuel ethanol to render it unfit for human consumption
3.3
denatured fuel ethanol
fuel ethanol that has been denatured by adding a denaturant to render it unfit for human consumption, and is used for blending ethanol gasoline for motor vehicles, which may be blended with gasoline at specified ratios for use as fuel for automotive spark-ignition internal combustion engines
3.4
pHe
measure of acid strength in denatured fuel ethanol
4 Requirements
4.1 Requirements for main raw materials
4.1.1 Fuel ethanol
The density of fuel ethanol at 20℃ shall be within the range of 0.7918g/cm3 to 0.7893g/cm3.
4.1.2 Denaturant
The denaturant added to fuel ethanol shall comply with the requirements of GB/T 22030 or GB 18351. No other oxygenates shall be artificially added.
4.2 Technical requirements
4.2.1 Addition rate of denaturant
The volumetric mixing ratio of fuel ethanol to denaturant shall be 100:1 to 100:5, i.e., the volume fraction of denaturant in denatured fuel ethanol shall be 0.99% to 4.76%.
4.2.2 Metal corrosion inhibitor
An effective metal corrosion inhibitor shall be added to meet the copper strip corrosion requirements for ethanol gasoline for motor vehicles.
4.2.3 Physical and chemical indexes
The physical and chemical indexes of denatured fuel ethanol shall meet those specified in Table 1.
Table 1 Physical and chemical indexes of denatured fuel ethanol
Item Index
Appearance Clear and transparent, free of visible suspended matter and sediment
Ethanol content φ/% ≥ 92.1
Methanol content φ/% ≤ 0.5
Solvent-washed gum content/(mg/100mL) ≤ 5.0
Moisture content φ/% ≤ 0.8
Inorganic chloride content (by Cl-)/(mg/L) ≤ 8
Acidity (by acetic acid)/(mg/L) ≤ 56
Copper content/(mg/L) ≤ 0.08
pHe 6.5~9.0
Sulfur content/(mg/kg) ≤ 30
5 Test methods
5.1 Density of fuel ethanol
The density of fuel ethanol at 20℃ shall be determined by the pycnometer method specified in GB/T 611-2006 or the digital densitometer method specified in GB/T 4472.
5.2 Denatured fuel ethanol
5.2.1 Appearance
At ambient indoor temperature, take 50mL of the specimen into a 100mL colorimetric tube and observe visually under bright light.
5.2.2 Ethanol content
Determine in accordance with the method specified in Annex A.
5.2.3 Methanol content
Determine in accordance with the method specified in Annex A.
5.2.4 Solvent-washed gum content
Determine in accordance with the method specified in GB/T 8019.
5.2.5 Moisture content
Determine in accordance with the method specified in Annex B.
5.2.6 Inorganic chloride content
Determine in accordance with the method specified in Annex C, with the potentiometric titration as the arbitration method.
5.2.7 Acidity
Determine in accordance with the method specified in Annex D.
5.2.8 Copper content
Determine in accordance with the method specified in Annex E.
5.2.9 pHe
Determine in accordance with the method specified in Annex F.
Contents
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test methods
6 Inspection rules
7 Marking, packaging, transportation and storage
Annex A (Normative) Determination of ethanol and methanol content in denatured fuel ethanol (gas chromatography)
Annex B (Normative) Determination of moisture content in denatured fuel ethanol (Karl Fischer titration method)
Annex C (Normative) Determination of chloride ion content in denatured fuel ethanol
Annex D (Normative) Determination of acidity in denatured fuel ethanol
Annex E (Normative) Determination of copper content in denatured fuel ethanol (graphite furnace atomic absorption spectrometry)
Annex F (Normative) Determination of pHe of denatured fuel ethanol
GB 18350-2013/XG1-2016+XG2-2020 Denatured fuel ethanol
1 Scope
This standard specifies the terms and definitions, requirements, test methods, inspection rules, and marking, packaging, transportation and storage of denatured fuel ethanol.
This standard is applicable to fuel ethanol that is produced from starchy, saccharide, cellulosic, and other raw materials through fermentation, distillation, and dehydration, and then denatured by addition of a denaturant.
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.
GB 190 Packing symbol of dangerous goods
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 601 Chemical reagent - Preparations of standard volumetric solutions
GB/T 602 Chemical reagent - Preparations of standard solutions for impurity
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods
GB/T 611-2006 Chemical reagent - General method for the determination of density
GB/T 683 Chemical reagent - Methanol
GB/T 4472 Determination of density and relative density for chemical products
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 8019 Standard test method for gum content in fuels by jet evaporation
GB/T 9722 Chemical reagent - General rules for the gas chromatography
GB/T 9724 Chemical reagent - General rule for the determination of pH
GB/T 9725-2007 Chemical reagent - General rule for potentiometric titration
GB 18351 Ethanol gasoline for motor vehicles (E10)
GB/T 22030 Blendstocks of ethanol gasoline for motor vehicles
GB 50016 Code of design on building fire protection and prevention
GB 50074 Code for design of oil depot
SH/T 0253 Determination of total sulfur content in light petroleum products (coulometric method)
SH/T 0689 Standard test method for determination of total sulfur in light hydrocarbons, motor fuels and oils by ultraviolet fluorescence
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
fuel ethanol
ethanol intended for use as fuel without addition of denaturant
3.2
denaturant
blendstock of ethanol gasoline for motor vehicles or ethanol gasoline for motor vehicles added into fuel ethanol to render it unfit for human consumption
3.3
denatured fuel ethanol
fuel ethanol that has been denatured by adding a denaturant to render it unfit for human consumption, and is used for blending ethanol gasoline for motor vehicles, which may be blended with gasoline at specified ratios for use as fuel for automotive spark-ignition internal combustion engines
3.4
pHe
measure of acid strength in denatured fuel ethanol
4 Requirements
4.1 Requirements for main raw materials
4.1.1 Fuel ethanol
The density of fuel ethanol at 20℃ shall be within the range of 0.7918g/cm3 to 0.7893g/cm3.
4.1.2 Denaturant
The denaturant added to fuel ethanol shall comply with the requirements of GB/T 22030 or GB 18351. No other oxygenates shall be artificially added.
4.2 Technical requirements
4.2.1 Addition rate of denaturant
The volumetric mixing ratio of fuel ethanol to denaturant shall be 100:1 to 100:5, i.e., the volume fraction of denaturant in denatured fuel ethanol shall be 0.99% to 4.76%.
4.2.2 Metal corrosion inhibitor
An effective metal corrosion inhibitor shall be added to meet the copper strip corrosion requirements for ethanol gasoline for motor vehicles.
4.2.3 Physical and chemical indexes
The physical and chemical indexes of denatured fuel ethanol shall meet those specified in Table 1.
Table 1 Physical and chemical indexes of denatured fuel ethanol
Item Index
Appearance Clear and transparent, free of visible suspended matter and sediment
Ethanol content φ/% ≥ 92.1
Methanol content φ/% ≤ 0.5
Solvent-washed gum content/(mg/100mL) ≤ 5.0
Moisture content φ/% ≤ 0.8
Inorganic chloride content (by Cl-)/(mg/L) ≤ 8
Acidity (by acetic acid)/(mg/L) ≤ 56
Copper content/(mg/L) ≤ 0.08
pHe 6.5~9.0
Sulfur content/(mg/kg) ≤ 30
5 Test methods
5.1 Density of fuel ethanol
The density of fuel ethanol at 20℃ shall be determined by the pycnometer method specified in GB/T 611-2006 or the digital densitometer method specified in GB/T 4472.
5.2 Denatured fuel ethanol
5.2.1 Appearance
At ambient indoor temperature, take 50mL of the specimen into a 100mL colorimetric tube and observe visually under bright light.
5.2.2 Ethanol content
Determine in accordance with the method specified in Annex A.
5.2.3 Methanol content
Determine in accordance with the method specified in Annex A.
5.2.4 Solvent-washed gum content
Determine in accordance with the method specified in GB/T 8019.
5.2.5 Moisture content
Determine in accordance with the method specified in Annex B.
5.2.6 Inorganic chloride content
Determine in accordance with the method specified in Annex C, with the potentiometric titration as the arbitration method.
5.2.7 Acidity
Determine in accordance with the method specified in Annex D.
5.2.8 Copper content
Determine in accordance with the method specified in Annex E.
5.2.9 pHe
Determine in accordance with the method specified in Annex F.
Contents of GB 18350-2013/XG1-2016+XG2-2020
Contents
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test methods
6 Inspection rules
7 Marking, packaging, transportation and storage
Annex A (Normative) Determination of ethanol and methanol content in denatured fuel ethanol (gas chromatography)
Annex B (Normative) Determination of moisture content in denatured fuel ethanol (Karl Fischer titration method)
Annex C (Normative) Determination of chloride ion content in denatured fuel ethanol
Annex D (Normative) Determination of acidity in denatured fuel ethanol
Annex E (Normative) Determination of copper content in denatured fuel ethanol (graphite furnace atomic absorption spectrometry)
Annex F (Normative) Determination of pHe of denatured fuel ethanol
