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Co-thermal liquefaction of Prosopis juliflora biomass with paint sludge for liquid hydrocarbons production

Jayakishan, B., Nagarajan, G., Arun, J.
Bioresource technology 2019 v.283 pp. 303-307
Fourier transform infrared spectroscopy, Prosopis juliflora, acids, bentonite, biofuels, biomass, carbon, carbon dioxide, carbon monoxide, catalysts, energy, gas chromatography-mass spectrometry, hydrogen, liquefaction, liquids, methane, sludge, temperature
In this study, Prosopis juliflora biomass was co-liquefied with hydrocarbons rich paint waste for next generation fuel (bio-oil) production. Co-liquefaction (HTL) was performed at varying biomass to paint waste ratios (1:0, 0:1, 1:1, 2:1 and 1:2) at different temperatures from 340 to 440 °C for a holding time of 60 min. Bentonite catalyst was added from 1 to 5% wt. to the HTL reactor. Gas Chromatography–Mass Spectroscopy (GC–MS) and Fourier Transform Infrared Spectroscopy (FTIR) analysis were carried out for bio-oil and HTL aqueous phase. Maximum bio-oil yield was around 49.26% wt. at 420 °C, 2:1 blend and 4% wt. of bentonite catalyst. Energy and carbon recovery of bio-oil was around 70% and 96% respectively. Additionally, HTL aqueous phase was analysed and it showed presence of acids molecules in it. The gas from HTL process contained Carbon dioxide (46.25%), Carbon monoxide (6.38%), Methane (9.35%) and hydrogen (24.53%).