Dataset on experimental investigation of temperature mediated variations in the chemical composition of bio-oil from pyrolysis of wheat bran.

The article reports data on the chemical profiling of Bio-Oil, produced as one of the byproducts from the pyrolysis of sieved wheat bran (particle size range (250-500 µm)), at two different temperatures, viz. 500 °C and 800 °C. The chemical composition of the oil fraction was determined using liquid chromatography-mass spectrometry (LC-MS) and gas chromatography-mass spectrometry (GC-MS). The catalogues of organic compounds observed in GC-MS analysis of the two Bio-Oil fractions revealed relatively higher numbers of compounds in the sample obtained on pyrolysis at 800 °C than in the oil obtained on pyrolysis at 500 °C The GC-MS analysis of wheat bran bio-oils produced at 500 and 800 °C revealed oxygenated compounds (3-furanmethanol and 1,4:3,6-dianhydro-α-D-glucopyranose), sulfur-containing compounds (trans-2,4-dimethylthiane S,S-dioxide), nitrogen-containing compounds (urea, imidazole, dimethylpyridine derivates and pyrozolinone derivatives) and minor hydrocarbons. These compounds originated primarily from the thermal degradation of cellulose, hemicellulose, proteins and amino acids while higher pyrolysis temperatures promoted secondary cracking and cyclization reactions. Several boron-containing compounds were also tentatively identified by NIST library matching and should be interpreted with caution. Alternatively, LC-MS analysis had shown similar trend with common organic compounds, including 2,4-Xylidine; Dimethylpyrazine; 2,4-Diaminotoluene; N-Methylcaprolactam; and Quinoline. The identified compounds demonstrate the conversion of wheat bran biomass into a range of value-added organic constituents through pyrolytic reactions. The results presented herein serve as a stepping stone to strengthen research on scalable process development for the valorisation of agro-waste, such as wheat bran, thereby minimizing the environmental burden.