Investigating the energy-water-carbon nexus of mega-scale chemicals production from Appalachian shale gas

Chang He, Fengqi You

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

This paper is concerned with techno-environmental modeling of large-scale chemicals production from Appalachian shale gas and investigates its environmental impacts. We first develop shale gas supply and plant design models to estimate pipeline distances, numbers of wells, well-sites, gathering systems needed in the near/mid-term, as well as the plant-level energy and materials balances. Next, we conduct a life cycle analysis (LCA) to evaluate the energy-water-carbon nexus in terms of energy consumption (ηle), freshwater footprint (ηlw), and greenhouse gas emissions (ηghg). The results show, based on a mass-based allocation approach, the ηle, ηlw, and ηghg are 13.8–17.2 GJ/t olefins, 3.31–4.28 kg/kg olefins, and 0.83–1.17 kg CO2-eq/kg olefins, respectively. However, if we use an economic value based allocation method, these values are updated to 37.4–28.7 GJ/t olefins, 7.28–9.42 kg/kg olefins, and 1.80–2.49 kg CO2-eq/kg olefins, respectively. The values of ηghg indicate that shale gas can be categorized as a lowcarbon feedstock based on a mass-based allocation approach, or high-carbon feedstock based on an economic value-based allocation approach.

Original languageEnglish (US)
Title of host publication26 European Symposium on Computer Aided Process Engineering, 2016
PublisherElsevier B.V.
Pages865-870
Number of pages6
Volume38
ISBN (Print)9780444634283
DOIs
StatePublished - Jan 1 2016

Publication series

NameComputer Aided Chemical Engineering
Volume38
ISSN (Print)1570-7946

Keywords

  • chemicals
  • energy-water-carbon nexus
  • environmental impacts
  • shale gas

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Computer Science Applications

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