1 Authors: Ankita Juneja, Deepak Kumar, Ganti S. Murthy Title: Economic feasibility and environmental life cycle assessment of ethanol production from lignocellulosic feedstock in Pacific Northwest U.S. Affiliations: Ankita Juneja a,1 , Deepak Kumar a,1 , and Ganti S. Murthy a* a Biological and Ecological Engineering, Oregon State University, Corvallis, OR 97330 1 These authors contributed equally to the manuscript. Corresponding Author: Ganti S. Murthy Assistant Professor Biological and Ecological Engineering 116 Gilmore Hall, Oregon State University, Corvallis, OR-97331 murthy@engr.orst.edu Ph. - 541-737-6291 Fax – 541-737-2082 Abstract Bioethanol produced from the lignocellulosic feedstock is a potential alternative to fossil fuels in transportation sector and can help in reducing environmental burdens. Straw produced from perennial ryegrass (PR) and wheat is a non-food, cellulosic biomass resource available in abundance in the Pacific Northwest U.S. The aim of this study was to evaluate the economic viability and to estimate the energy use and greenhouse gas (GHG) emissions during life cycle of ethanol production from PR and wheat straw. Economic analysis of ethanol production on commercial scale was performed using engineering process model of ethanol production plant with processing capacity of 250,000 metric tons of feedstock/year, simulated in SuperPro