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DOI: https://doi.org/10.4491/eer.2020.592
Experimental investigation on the production of bio-oil from maize straw at a pilot scale
N. S. Rathore1, Arjun Sanjay Paul2, and N. L. Panwar2
1Vice Chancellor, Maharana Pratap University of Agriculture and Technology, Udaipur (Rajasthan) 313001 India
2Department of Renewable Energy Engineering, College of Technology and Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur (Rajasthan) 313001 India
Corresponding Author: N. L. Panwar ,Tel: +91 294 2471068, Fax: +91 294 2471056, Email: nlpanwar@rediffmail.com
Received: October 27, 2020;  Accepted: December 24, 2020.
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The production of biofuel from agricultural crop residue via fast pyrolysis is becoming a popular option. It can help to build a robust renewable fuel market and ensure environmental sustainability. In this study, the widely available maize straw was used for the production of bio-oil in a fluidized bed reactor at a pilot scale. The effect of pyrolysis parameters such as temperature, biomass particle size, and carrier gas flow rate on the production of bio-oil, char, and syngas was investigated. The maximum bio-oil yield of 44.6 wt.% was achieved at a pyrolysis temperature of 500℃. The physicochemical properties of bio-oil were determined, and the heating value was found to be 18.5 MJ/kg. Furthermore, the chemical composition of maize straw bio-oil was analyzed by GC-MS and FTIR. The compounds such as phenol (22.83%), carboxylic acids (27.36%), ketone (19.14%) alcohols (2.09%), esters, furfural, hydrocarbon and aromatic compounds, etc. were identified in the bio-oil. The cost analysis of the developed system showed that the cost of production of bio-oil from maize straw was 0.47 US$/L and the calculated payback period was 1.47 year.
Keywords: Bio-oil | Char | Fast pyrolysis | Fluidized bed | Maize straw
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