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Blooming-forming cyanobacteria pyrolysis over Ni-Al layered double oxides/MCM-41 for nitriles under nitrogen and methanol atmosphere
Blooming-forming cyanobacteria were catalytically pyrolyzed over Ni-Al layered double oxides/MCM-41 (NiAl-LDO/MCM-41) composites with nitrogen or methanol as sweep gas for the production of nitrogenous compounds. The effect of catalysts and gas atmosphere on the product distribution and the formation of nitrogenous compounds was investigated. The results showed that the amount of nitrogenous compounds increased with the increase of catalyst/cyanobacteria ratio; liquid yields of about 50% were obtained over NiAl-LDO/MCM-41 under both nitrogen and methanol atmosphere. However, composites of the hydrocarbons and aromatic compounds in bio-oil under methanol atmosphere were lower than those under nitrogen atmosphere. Nitrogenous compound content of 78.6%, especially a 68.5% content of nitriles with low oxygen content and acidity, demonstrated that the bio-oil obtained was promising in producing value-added platform chemicals.
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