Non-catalytic partial oxidation of bio-oil to synthesis gas for distributed hydrogen production

摘要

A system has been developed for the volatilization and conversion of a bio-oil mixed with methanol to synthesis gas via non-catalytic partial oxidation (NPOX) using an ultrasonic nozzle to feed the mixture. Such a process would be ideal for distributed H_2 production. The feedstock used was derived from poplar wood. The effects of both temperature (from 625 to 850 ℃) and added oxygen (effective O:C ratio from 0.7 to 1.6) on the yields of CO and H_2 have been explored. High yields of CO (between 50% and 70% of the maximum possible from the bio-oil) have been observed. Hydrogen yields are much lower (～25% of the maximum possible). However, the water formed during NPOX can be used to generate additional H_2. The bio-oil carbon to gas conversion is typically between 85% and 95% for optimal conditions. Due to this significant conversion, lower catalyst loadings are expected to be required for the downstream processing.