Sustainability Assessment and Root Cause Analysis of Poly-Generation Systems

Tuesday, October 18, 2011
Exhibit Hall B (Minneapolis Convention Center)
Abhishek V. Jayswal1, Anand Zanwar2, Kailiang Zheng3, Preeti Gangadharan2 and Helen Lou2, (1)Dan F. smith Department of Chemical Engineering, Lamar University, Beaumont, TX, (2)Dan F. Smith Department of Chemical Engineering, Lamar University, Beaumont, TX, (3)Department of Chemical Engineering, Lamar University, Beaumont, TX

In sustainability assessment, the performance of the related processes is compared, considering the economic, environmental and social factors. In complicated poly-generation systems that involve energy and chemical conversion through several pathways, sustainability assessment becomes even more difficult due to the existence of multiple products and multiple feed.

The root-cause analysis framework is built on the combination of Pareto chart and the Fish-bone diagram, in conjunction with the sustainability metrics. The results of the RCA illustrate the major factors that adversely affect sustainability of each dimension. A good root-cause analysis method depends on an appropriate sustainability assessment system because of the multi-dimensional nature of sustainability.

In this paper, three poly-generation schemes involving coal and natural gas as feed are compared using a comprehensive sustainability assessment method, incorporating exergy analysis and a novel safety assessment approach to complement the economic and environmental assessment. Further, the selected case is examined in a root cause analysis, to identify the major causes that affect the sustainability performance, in order to eliminate or minimize the effect with appropriate corrective action.

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See more of this Session: Poster Session: Sustainability and Sustainable Biorefineries
See more of this Group/Topical: Sustainable Engineering Forum