Fluid Bed Process Studies on Selective Conversion of Methanol to High Octane Gasoline. Final Report.

摘要

The Mobil fluid bed methanol-to-gasoline process has been successfully scaled-up to a 4barrel-a-day pilot plant. Gasoline selectivity is higher than 88wt% of hydrocarbons produced,and the octane rating is 96Research clear. Gasoline quality is excellent and exceeds all the requirements of unleaded regular gasoline. With this demonstration accomplished,the process is now ready for scale-up to a 100 B/D pilot plant,the final step before constructing commercial size facilities. The program consisted of cold model flow studies followed by design,construction,and operation of the pilot plant. A 5-month process development study was then carried out. The adiabatic reactor temperature profile was very uniform,and the plant operations were extremely smooth and stable. Methanol was completely converted at design conditions. Steady state operations were demonstrated,and gasoline yield and quality were optimized. Process variable studies showed that durene yields increased with pressure and decreased with temperature. Several process concepts including light gas recycle,co-feeding liquid/vapor methanol,and heat removal from the fluid bed were evaluated. A process design basis for a large unit was developed based on the results of this study. (ERA citation 04:025757)