Economic perspective of ethanol and biodiesel coproduction from industrial hemp

• Published in: Journal of cleaner production Vol. 299; no. C; p. 126875
• Main Authors: Viswanathan, Mothi Bharath, Cheng, Ming-Hsun, Clemente, Tom Elmo, Dweikat, Ismail, Singh, Vijay
• Format: Journal Article
• Language: English
• Published: United Kingdom Elsevier Ltd 25.05.2021; Elsevier
• Subjects: agricultural land; Biodiesel; Bioethanol; biomass; Cannabis sativa; energy crops; ethanol; Fatty acid methyl esters; feedstocks; genotype; hemp; Industrial hemp; lignocellulose; lipid content; lipids; soybeans; Technoeconomic analysis; Triacylglycerol; Technoeconomic analysis; Bioethanol; Triacylglycerol; Biodiesel; Industrial hemp; Fatty acid methyl esters
• ISSN: 0959-6526; 1879-1786
• DOI: 10.1016/j.jclepro.2021.126875

In this study, the economics of producing biofuels from an industrial hemp (Cannabis sativa) genotype – 19m96136 was investigated. A lignocellulosic biofuel plant, hourly consuming 85 metric tons of hemp biomass was modeled in SuperPro Designer®. The integrated bioenergy plant produced hemp biodiesel and bioethanol from lipids and carbohydrates, respectively. The structural composition of the industrial hemp plant was analyzed in a previous study. The data obtained was used to simulate feedstock composition in SuperPro Designer®. The simulation results indicated that Hemp containing 2% lipids can yield up to 3.95 million gallons of biodiesel annually. On improving biomass lipid content to 5 and 10%, biodiesel production increased to 9.88 and 19.91 million gallons, respectively. The breakeven unit production cost of hemp biodiesel with 2, 5, and 10% lipid containing hemp was $18.49, $7.87, and $4.13/gallon, respectively. The biodiesel unit production cost when utilizing 10% lipid-containing hemp was comparable to soybean biodiesel at $4.13/gallon. Furthermore, sensitivity analysis revealed the possibility of a 7.80% reduction in unit production cost upon a 10% reduction in hemp feedstock cost. Furthermore, industrial hemp was capable of producing between 307.80 and 325.82 gallons of total biofuels per hectare of agricultural land than soybean. •Between 3.95 and 19.91 million gallons/yr of biodiesel can be produced from industrial hemp containing 2–10% lipids.•The breakeven unit production cost (UPC) of hemp biodiesel varied between $18.49 and $4.31/gallon biodiesel.•At 10% lipid concentration in hemp biomass, the UPC is comparable to soybean biodiesel.•A hectare of industrial hemp can produce 51% more biodiesel than soybean.