Abstract
Pyrolysis experiments of two types of algal biomass (Spirogyra) freshwater Algae (FWA) and microbial treated algae (MTA) were carried out in an electrically heated stainless steel reactor to determine the effects of pyrolysis temperature, pyrolysis product yields and bio-oil properties. After pyrolysis two types of bio-oil were produced, freshwater algae bio-oil (FWAB) and microbial treated algae bio-oil (MTAB). Gas chromatography/mass spectrometry (GC-MS) analysis and Fourier transform infrared spectroscopy (FTIR) has been done of both types of bio-oil samples and also a comparison is shown between these two samples and explained it with the help of graphs and tables. The bio-oil was obtained from pyrolysis in which temperature of the system was kept 25°C and then increased up to 650°C time by time. After pyrolysis the obtained bio-oil was introduced to distillation and then analyzed by GC-MS technique and FTIR, which show different peaks and results of different compounds and functional groups present in both bio-oil samples and a noticeable difference is shown between these two bio-oil samples on the basis of hydrocarbons as well as other compounds.
Highlights
Bio-Oil, a liquid product from thermal conversion of biomass has been paid attention to provide fuels and chemicals [1]
The main peaks identification of compounds has been performed by using NIST mass spectral data base. Both freshwater algae bio-oil (FWAB) and microbial treated algae bio-oil (MTAB) were complex mixture and contain different classes of hydrocarbons and other compounds, which are shown in the Tables 2 and 3 respectively
The product of pyrolysis contains oil like liquid which is believed that it is composed of compounds containing less oxygen contents
Summary
Bio-Oil, a liquid product from thermal conversion of biomass has been paid attention to provide fuels and chemicals [1]. Biomass can be converted into bio-fuel by means of different processes, e.g., reductive combustion, liquefaction, pyrolysis and gasification [20]. Production of bio-oil (FWAB and MTAB) from FWA and MTA biomass through pyrolysis. Both FWAB and MTAB were complex mixture and contain different classes of hydrocarbons and other compounds, which are shown in the Tables 2 and 3 respectively. The GC-MS analysis results indicate the presence of different classes of hydrocarbons and other compounds which includes azoles, azene, nitriles, and long chain aliphatic compounds and some others. The tetradecanenitrile and Hexadecaneperoxoic acid accounted 14.10% and 14.26% respectively of the total bio-oil, which contribute better combustion property of the algal fuel
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