دانلود مقاله A Mining Waste as a Catalyst for the Upgrading of a Hardwood Chip Derived Pyrolysis Bio-Oil
سال انتشار: ۱۳۹۱
محل انتشار: چهاردهمین کنگره ملی مهندسی شیمی ایران
تعداد صفحات: ۴
Elham Karimi – National Petrochemical Company, Research and Technology, Tehran, Iran
A highly acidic bio-oil (pH < 3) produced by the fast pyrolysis of sawmill residue hardwood chips was successfully upgraded using Red Mud bauxite mining wasteoriginating from the Bayer process as the catalyst. The upgrading process proceeds at 365 °C without the addition of external hydrogen and yields astabilized bio-oil with an oxygen content of 3.5 % and heating value of 34 kJ/g compared to 43.1 % and 12 kJ/g, respectively, for the crude oil. Simultaneously,the Red Mud employed as the catalyst is converted from an alkaline (pH > 12) hazardous waste to a partially reduced magnetic neutral gray material with acarbon content of ~ 33 % (w/w) with possible use as an iron ore, iron ore pelletization binder or soil additive. The co-processing of the two waste streams –one from forestry, the other from aluminum mining operations – may thus offerattractive economic and ecologic synergies.