| 摘要 |
<p>Disclosed herein is a method for producing a butanol gasoline blend having good cold start and warm-up (CS&W) driveability performance comprising: (a) providing at least one biologically-sourced butanol isomer; and (b) blending said butanol isomer and optionally ethanol with gasoline to form a butanol gasoline blend, the butanol gasoline blend having a vapor pressure corresponding to a specific ASTM D4814 vapor pressure / distillation class of gasoline; wherein the butanol gasoline blend has a value of low butanol driveability index (LBDI) equal to the linear combination a1T10 + a2T50 + a3T90 + a4EtOH + BuOH (a5–a6 E200) below the maximum limit for Driveability Index (DI) for the specific class of gasoline; wherein: T10 is the temperature for distillation of 10-volume percent of the butanol gasoline blend; T50 is the temperature for distillation of 50-volume percent of the butanol gasoline blend; T90 is the temperature for distillation of 90-volume percent of the butanol gasoline blend; EtOH is the concentration in volume percent of ethanol in the butanol gasoline blend; BuOH is the concentration in volume percent of the at least one biologically-sourced butanol isomer in the butanol gasoline blend; E200 is the volume percent of the butanol gasoline blend that distills at temperatures up to about 200 °F; the maximum limit for the Driveability Index (DI) for the specific class of gasoline is specified in Table 1 of ASTM D 4814-08a; and a1 is 1.5, a2 is 3, a3 is 1, and a4 is 2.4, and wherein a5 is 16 and a6 is 0.3 when the concentration of ethanol is less than 10 volume percent and the concentration of the at least one biologically-sourced butanol isomer is less than 20 volume percent; and wherein the total weighted demerits of the butanol gasoline blend is less than about 40.</p> |
