Hydrocarbons, C4 – C11 Analysis of reformate Application Note Energy & Fuels Authors Introduction Agilent Technologies, Inc. Gas chromatography with an Agilent CP-Sil 2 CB column separates 111 reformate C4 to C11 hydrocarbons in 49 minutes. Conditions Technique : GC-capillary Column : Agilent CP-Sil 2 CB, 0.25 mm x 100 m fused silica WCOT CP-Sil 2 CB (df = 0.25 μm) (Part no. CP7724) (2x coupled) Temperature : 40 °C (8 min) → 200 °C, 4 °C/min Carrier Gas : He, 300 kPa (3 bar, 42 psi) Injector : Splitter, 1:50 T = 200 °C Detector : MSD transfer line 280 °C Sample Size : 1 μL Courtesy : D. Estel, Leuna Werke, Leuna, Germany Peak identification 7. 2,3-dimethylbutane 22. 1-cis-3-dimethylcyclopentane + 33. 1-trans-2-cis-3-trimethylcyclopentane 50. n-octane 8. 2-methylpentane 3-ethylpentane 34. unknown 52 - 56. iso-C9-paraffins 10. 3-methylpentane 23. 1-trans-3-dimethylcyclopentane 35. toluene 57. ethylcyclohexane 11. n-hexane 24. 1-trans-2-dimethylcyclopentane 36. 2,3-dimethylhexane 58. unknown 12. 2,2-dimethylpentane 25. n-heptane 37. 2-methyl-3-ethyl-pentane 59. ethylbenzene 13. 2,4-dimethylpentane 26. unknown 38. 2-methylheptane 60 - 61. iso-C9-paraffins 14. methylcyclopentane 27. 1,1,3-trimethylcyclopentane 39. 4-methylheptane 62. 4-methyloctane 15. 2,2,3-trimethylbutane 28. 2,2-dimethylhexane + 40. 1,1,2-trimethylcyclopentane 63. 2-methyloctane 16. benzene 1-cis-2-dimethylcyclopentane 41. 3,4-dimethylhexane 64. m-xylene + p-xylene 17. 3,3-dimethylpentane 29. methylcyclohexane + 42. 3-methylheptane 65. 3,4-dimethyloctane ? 18. 2-methylhexane 2,5-dimethylhexane + 43. 3-ethylhexane 66. 3-methyloctane 19. cyclohexane 2,4-dimethylhexane 44. 1-cis-2-trans-4-trimethylcyclopentane 67. o-xylene 20. 2,3-dimethylpentane 30. ethylcyclopentane 45. 1-cis-3-dimethylcyclohexane + 68. n-nonane 21. 3-methylhexane + 31. 3,3-dimethylhexane 1-trans-4-dimethylcyclohexane 69. isopropylbenzene 1,1-dimethylcyclopentane 32. 1-trans-2-cis-4-trimethylcyclopentane 49. 1-cis-4-dimethylcyclohexane + 70 - 71. iso-C10-paraffins 1-trans-3-dimethylcyclohexane 2 Peak identification 70 - 71. iso-C10-paraffins 83. 1-methyl-3-n-propylbenzene 95. 1,3-dimethyl-2-ethylbenzene 107. tetrahydronaphthalene 72. n-propylbenzene 84. n-butylbenzene 96. iso-C11-paraffins 108. C11-aromate 73. 1-methyl-3-ethylbenzene 85. 1-methyl-4-n-propylbenzene 97. toluene 109. pentamethylbenzene 74. 1-methyl-4-ethylbenzene 86. 1,3-dimethyl-5-ethylbenzene 98. 1,2,4,5-tetramethylbenzene (durene) 110. 2-methyl naphthalene 75 - 77. iso-C10-paraffins 87 - 88. unknown 99. 1,2,3,5-tetramethylbenzene (isodurene) 111. 1-methyl naphthalene 78. 1,3,5-trimethylbenzene 89. 1-methyl-2-n-propylbenzene 100 - 101. dimethyl-n-propylbenzenes (no position) 79. 1-methyl-2-ethylbenzene 90. iso-C11-paraffins 102. unknown 80. 1,2,4-trimethylbenzene 91. 1,4-dimethyl-2-ethylbenzene 103. 5-methylindane 81. 1,2,3-trimethylbenzene 92. 1,3-dimethyl-4-ethylbenzene 104. 4-methylindane 82. indane + isobutylbenzene 93. 1,2-dimethyl-4-ethylbenzene 105. 1,2,3,4-tetramethylbenzene + sec-butylbenzene 94. 1-methylindane + 2-methylindane 106. C11-aromate 3 www.agilent.com/chem This information is subject to change without notice. © Agilent Technologies, Inc. 2011 Printed in the USA 31 October, 2011 First published prior to 11 May, 2010 A00903.