This document introduces the market situation of ethanol fuels made from renewable biomass worldwide, as well as the key feedstock and specifications requirements for ethanol fuels. By using multidimensional capillary column GC (MDGC) system, multiple individual measurements can be combined into a single run, greatly reducing the analysis time.
The document presents an alternative to standard ASTM methods (D5501 and D5580) for analyzing ethanol, methanol, benzene, and toluene in fuel blends. The proposed method utilizes a Deans switch system with two 15-meter orthogonal columns (HP-1 and HP-Innowax).
| Column 2 Type | HP-Innowax, 15m x 0.25mm x 0.25um |
|---|---|
| Oven Temperature Condition | 45 °C isothermal |
| Split/Splitless Inlet Split Ratio | 200:1 |
| Injection Size | 0.5 uL |
The overall cycle time for the analysis was reduced from several hours (or 45 minutes for specific components) to less than 15 minutes, with alcohol analysis specifically reduced to 3.5 minutes.
The method offers faster analysis, complete resolution of methanol from light hydrocarbons, and allows multiple analyses (ethanol, methanol, benzene, toluene) in a single run.
Yes, combining multiple heart-cuts allows the analysis of ethanol, benzene, and toluene in a single run on one instrument.