Dr. KnowBOILING POINT RANGES OF SOME HYDROCARBONS
NUMBER OF STRUCTURAL ALIPHATIC ACYCLIC HYDROCARBON ISOMERS IN THE C4-C13 RANGE
A standard DHA (Detailed Hydrocarbon Analysis) can consist of at least 10000 components, a PIONA analysis (Paraffins, Isoparaffins , Olefins, Naphthenes, Aromatics) which also includes cyclic and aromatic hydrocarbons in the same range can easily consist of more than 15000 components.
Hydrocarbon mixtures that are typical for Simulated Distillation Analyses can contains hydrocarbons up to C100 and therefore be a mixture of 1040 components.
COLUMNS FOR HYDROCARBON ANALYSIS
PROS AND CONS
Column Remark Tmax [°C] Aluminium Oxide Detailed information about C1-C5; Only hydrocarbons, no polars; Very sensitive for water 200 CarboBOND Impurities in C2 stream; Only separation between CO and air if air concentration is not to high; No separation between N2 and O2. 200/300 (bake out) CarboPLOT P7 Analysis of CO and CO2; Separation of O2 and N2; Not sensitive for water 115 Molsieve 5 A Permanent gasses; Very sensitive for water and CO2 350 PoraBOND Q Not very selective for hydrocarbons; Advised for various solvents and CO2 320/320 PoraPLOT Q-HT, HPPLOT Q Not very selective for hydrocarbons; Advised for various solvents and CO2 290/290 PoraPLOT Q/S Not very selective for hydrocarbons; Advised for various solvents and CO2 250/250 PoraPLOT U, HPPLOT U Not very selective for hydrocarbons; Advised for various solvents and CO2 190/190 CP-Sil 2 CB Detailed information about C5-C9; More stable in comparison with squalane 200/200 CP-Sil PONA CB, HP-PONA Detailed information about C5-C9 250/275 SilicaPLOT/GasPro Detailed information about C1-C4 (less selective as Al2O3); Not sensitive for water; Very suitable for sulfer components and halogenated components 225/225 Squalane Detailed information about C5-C9; Only advise if the customer doesn't want to use CP-Sil 2 CB or CP-Sil PONA CB 90/95