Preparation of Ni/biochar Catalyst for Hydrotreating of Bio-Oil from Microalgae Biomass

Preparation and Application of Biochar-Based Catalysts for Biofuel Production

“…Bio-oil cannot be directly utilized as transport fuel due to its poor fuel properties, e.g., high oxygen content and low higher heating value (HHV). The catalytic upgrading of bio-oil is considered as a promising route to overcome these shortcomings [4]. Similarly, the effective catalytic hydrolysis of cellulose to saccharides is the key to applying lignocellulosic biomass instead of cereals (e.g., corn, wheat) for bio-ethanol production [5].…”

“…Biomass refining, which mimics petroleum refining, intends to produce valuable chemicals, fuels, and functional materials from biomass. Biochar-based catalysts are used in various biomass refining processes, such as biomass hydrolysis and dehydration [13,14], biodiesel production [2,27], biomass pyrolysis [28], bio-oil upgrading [4,28], tar removal [29,30], and the Fischer-Tropsch synthesis of liquid hydrocarbons from syngas [31], etc. Detailed information can be found in related reviews [6,13,14].…”

Application of biochar-based catalysts in biomass upgrading: a review

“…24,54,55,62,63 Metals and/or metal oxides with catalytic activity can be loaded onto the biochar supports by preloading the metal precursors into the biomass matrix before pyrolysis 55,[64][65][66] or by impregnating the activated biochars with the metal precursors. 62,[66][67][68] Previous studies reported that various biochar-supported metal catalysts with high dispersion could be prepared according to the above mentioned methods. 24,64,65 In this review, the application of these biochar-supported catalysts for biomass pyrolysis, gasication, and bio-oil upgrading will be discussed in detail in Section 4.3.…”

“…The biochar supported metal or metal oxides can also be prepared by impregnating the biochar with metal precursor. 62,[66][67][68] Indeed, it was reported that the biocharsupported Ni catalyst was a promising catalyst for hydrogen production from biomass gasication. 67 The biochars obtained from fast pyrolysis of wheat straw, rice husk, cotton stalk, and commercial active carbon were used as catalyst supports, and Ni was supported on the biochars by the impregnation method.…”

“…The results revealed that the cotton stalk biochar-supported Ni catalyst showed high hydrogen production because of its high content of alkaline and alkaline earth metals and high external surface area. 67 Nguyen et al 62 found that the bio-oil from microalgae could be effectively converted into hydrocarbon under the catalysis of Ni/biochar via hydrodeoxygenation (HDO) and hydrodenitrogenation (HDN) processes. Both oxygenates and nitrogenates in the bio-oil were sharply reduced aer the catalytic upgrading process, indicating the high activity and selectivity of the Ni/biochar catalyst.…”