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Cover of Development of a Procedure to Chemically Characterise Bitumens using the Iatroscan
Development of a Procedure to Chemically Characterise Bitumens using the Iatroscan
  • Publication no: AP-T52-06
  • ISBN: 1 921139 49 8
  • Published: 30 August 2006
This report gives information on the development of a procedure to fractionate bitumen using an Iatroscan liquid chromatography system, and also presents test results on a range of Australian bitumens. An introduction discusses the topic of bitumen fractionation and emphasises that all bitumen fractionation procedures are arbitrary - there is no widely accepted single way of categorising bitumen constituents.
  • AP-T52/06 Development of a Procedure to Chemically Characterise Bitumens using the Iatroscan
  • SUMMARY
  • CONTENTS
  • TABLES
  • FIGURES
  • 1. INTRODUCTION
    • 1.1. Bitumen fractionation
      • 1.1.1. The chemical makeup of bitumen
      • 1.1.2. Defining bitumen fractions
    • 1.1. Liquid chromatography
    • 1.2. Operating principle of the Iatroscan
  • 2. PROBLEMS WITH THE INSTRUMENT
    • 2.1. Poor repeatability
    • 2.2. Change in properties of the rods with time
    • 2.3. Burning off asphaltenes
    • 2.4. Apparent loss of material during development
      • 2.4.1. Overview
      • 2.4.2. Verification of problem using candle wax
      • 2.4.3. Effect of spot size
      • 2.4.4. Effect of scan speed
    • 2.5. Selection of test conditions
      • 2.5.1. Initial spotting and scanning conditions
      • 2.5.2. Final conditions employing rapid spot deposition
  • 3. SELECTION OF A DEVELOPMENT PROCEDURE
    • 3.1. Introduction
    • 3.2. Japanese Iatron laboratories method
    • 3.3. German method
    • 3.4. ARRB fraction development procedure
      • 3.4.1. Introduction
      • 3.4.2. Asphaltene determination
      • 3.4.3. Development of the maltene fraction
  • 4. THE USE OF CALIBRATION CURVES
    • 4.1. Introduction
    • 4.2. Column separation of bitumens
    • 4.3. Preparation of calibration curves
  • 5. ARRB FRACTIONATION PROCEDURE
    • 5.1. General
    • 5.2. Procedure
      • 5.2.1. Precipitation of the asphaltene fraction
      • 5.2.2. Development and testing of the maltene fraction
      • 5.2.3. Calculation of the percentage of each fraction
  • 6. TEST RESULTS FOR SAMPLES UP TO 1991
  • 7. DISCUSSION
    • 7.1. Relating chemical fractions to bitumen structure
    • 7.2. Bitumen fractions and field performance
      • 7.2.1. Colloidal instability
      • 7.2.2. High temperature susceptibility
      • 7.2.3. Tender bitumens
      • 7.2.4. Asphaltenes vs saturates
  • 8. CONCLUSIONS AND FUTURE WORK
  • REFERENCES
  • INFORMATION RETRIEVAL
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