MIE Seminar: Recovery of Carbon Dioxide for Sustainable Manufacturiing Applications by Mr. Sarang Supekar
~~ The Department of Mechanical and Industrial Engineering Presents
Mr. Sarang Supekar
Topic: Recovery of Carbon Dioxide for Sustainable Manufacturing Applications
Date: Tuesday, April 01, 2014
Time: 10:30am to 12:00pm (Refreshments from 10:00am to 10:30am)
Location: 318 Curry Student Center
Abstract: Carbon dioxide (CO2) is being studied as an alternative solvent and chilling agent in several industrial applications. One such application is the use of rapidly expanding sprays of supercritical CO2 as metalworking fluids. This talk will discuss the functional performance of supercritical CO2 metalworking fluids as a substitute for conventional aqueous metalworking fluids that have emerging performance and cost limitations, as well as inherent environmental and occupational health hazards. The ability of supercritical CO2 metalworking fluids to improve machining productivity in a broad range of cutting and forming processes will be described along with experimental results on tool wear, heat removal efficacy, lubrication efficacy, and surface finish. Despite the ability of CO2 to serve as a green substitute for toxic or flammable compounds, attribute-based allocation methods in life cycle assessment (LCA) overestimate the environmental burdens of CO2 production, and there is a need to develop LCA methods specific to recovered gases. Towards this end, a consequential LCA method is presented that ascribes environmental burdens to the CO2 producer (such as an ammonia, hydrogen, or ethanol plant) and the recovered CO2 end user based on the emissions created or displaced from the unit processes on the margin due to the demand for recovered CO2. The framework is applied to evaluate CO2 use in two case studies: metalworking fluids in machining, and cleaning fluids in semiconductor manufacturing. The results demonstrate the potential for using recovered CO2 as an approach to sustainable manufacturing that improves performance, and lowers GHG emissions, ecotoxicity, energy use, and water use relative to the status quo. The talk will conclude by identifying directions for future technological research on industrial applications for recovered gas-based systems, as well as technology policy research for mitigation of CO2 as a pollutant using optimization and life cycle engineering tools.
Bio: Sarang Supekar is a doctoral candidate in Mechanical Engineering at the University of Michigan Environmental and Sustainable Technologies Lab. He earned his Bachelor’s degree from University of Pune, and Master’s degree from University of Florida, both in Mechanical Engineering. His research interests are in the application of industrial ecology and manufacturing engineering for the development of new technologies, and the strategic use of existing technologies to reduce environmental emissions and resource consumption in industrial applications. He has co-developed and assisted with teaching undergraduate and graduate courses in sustainable design and life cycle engineering. He is the recipient of the E. Wayne Kay Graduate Scholarship from the Society of Manufacturing Engineers for his research in manufacturing technology, and the Martin Luther King Jr. Spirit award from the University of Michigan. In 2014, he received the College of Engineering Distinguished Leadership award for his education, diversity, and inclusion initiatives at the University of Michigan.
Tuesday, April 1, 2014 at 10:30am to 12:00pm
Curry Student Center, 318
346 Huntington Avenue, Boston, MA, Boston