Hydrotreatment of bio-oil over Ni-based catalyst
2013
Zhang, Xinghua | Wang, Tiejun | Ma, Longlong | Zhang, Qi | Jiang, Ting
Inexpensive non-sulfided Ni-based catalysts were evaluated for hydrotreatments using phenol as model compound. HZSM-5, a zeolite with different ratio of Si/Al and γ-Al2O3 were impregnated with Ni(NO3)2·6H2O and calcined at 450°C. Conversion rates and product distribution for treatment of phenol at 160–240°C in the presence of catalysts with nickel loads of 6, 10, 14 and 17wt.% were determined. Phenol conversion was highest (91.8%) at 240°C in the presence of HZSM-5(Si/Al=38) loaded with 10% Ni. When hydrotreatment was carried out with bio-oil obtained from pyrolysis of pine sawdust under the optimal conditions determined for phenol, the pH of bio-oil increased from 2.27 to 4.07, and the hydrogen content increased from 6.28 to 7.01wt.%. The decrease in acidity is desirable for the use of upgraded bio-oil.
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