The International Journal of Life Cycle Assessment

, Volume 7, Issue 5, pp 277–282

Life cycle inventory analysis of co2 emissions manufacturing commodity plastics in japan

  • Nobuhiko Narita
  • Masayuki Sagisaka
  • Atsushi Inaba
LCA Case Studies

DOI: 10.1007/BF02978888

Cite this article as:
Narita, N., Sagisaka, M. & Inaba, A. Int J LCA (2002) 7: 277. doi:10.1007/BF02978888


The goal of this study was to calculate the average CO2 emissions for manufacturing three commodity plastics, polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC) in Japan. The CO2 emissions were calculated from cradle to gate, excluding the calcination processes after use. As the results, the followings were observed:

1) The gross CO2 emissions for the manufacture of plastics in Japan were 1.3, 1.4, and 1.7 kg-CO2/kg-PE, PP, and PVC, respectively. These mainly reflected the difference of CO2 emissions for the in-house electricity generation. 2) The CO2 emissions for the electricity used for manufacturing PVC were higher than that used for PE and PP, because additional electricity was required for the electrolysis to produce chlorine. The gross electricity consumption for manufacturing PVC was 1.3 kWh/kg-PVC, and the other plastics consumed 0.5 kWh/kg-Products. In addition, the effects of energy saving were studied using a projected gas-diffusion electrode for the electrolysis of salt on the reduction of CO2 emissions. It was estimated that the reduction in CO2 emissions was 7% compared with the present PVC manufacturing processes.


Carbon dioxide electrolysis of salt Japan life cycle inventory polyethylene polypropylene polyvinyl chloride 

Copyright information

© Ecomed Publishers 2002

Authors and Affiliations

  • Nobuhiko Narita
    • 1
  • Masayuki Sagisaka
    • 2
  • Atsushi Inaba
    • 2
  1. 1.Nippon Steel Technoresearch CorporationJapan Environmental Management Association for IndustryTaitoh-ku, TokyoJapan
  2. 2.National Institute for Advanced Industrial Science and TechnologyTsukuba, IbarakiJapan

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