The present authors have been developing new bio-diesel HiBD (High Quality Bio-Diesel), which is composed of a mixture of hydrocarbons containing straight chain and branched paraffins and olefins. Although production technique of this fuel is close to industrialization stage, adhesion of the catalyst particles is a serious problem, which is caused by coke formation during reaction. In the present work, we demonstrated a stable long run operation for 30 h with a new slurry phase reactor using a hydrotalcite catalyst. Catalyst regeneration by air oxidation was also investigated.
