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Open AccessArticle

Energy Flows and Carbon Footprint in the Forestry-Pulp and Paper Industry

1
College of Economics and Management, Nanjing Forestry University, Nanjing 210037, China
2
Faculty of Forestry, University of Toronto, Toronto, ON M5S 3H7, Canada
3
Department of Forest Sciences, University of Helsinki, 00014 Helsinki, Finland
*
Author to whom correspondence should be addressed.
Forests 2019, 10(9), 725; https://doi.org/10.3390/f10090725
Received: 15 July 2019 / Revised: 11 August 2019 / Accepted: 17 August 2019 / Published: 23 August 2019
(This article belongs to the Section Forest Economics and Human Dimensions)
In the context of global climate change, energy conservation and greenhouse effect gases (GHG) reduction are major challenges to mankind. The forestry-pulp and paper industry is a typical high energy consumption and high emission industry. We conducted in-depth research on the energy flows and carbon footprint of the forestry-pulp paper industry. The results show that: (1) The main sources of energy supply include external fossil fuel coal and internal biomass fuel black liquor, which supply 30,057,300 GJ and 14,854,000 GJ respectively; in addition, the energy produced by diesel in material transportation reaches 11,624,256 GJ. (2) The main energy consumption processes include auxiliary engineering projects, material transportation, papermaking, alkali recovery, pulping and other production workshops. The percentages of energy consumption account for 26%, 18%, 15%, 10% and 6%, respectively. (3) The main sources of carbon include coal and forest biomass, reaching 770,000 tons and 1.39 million tons, respectively. (4) Carbon emissions mainly occur in fuel combustion in combined heating and power (CHP) and diesel combustion in material transportation, reaching 6.78 million tons and 790,000 tons of carbon, respectively. (5) Based on steam and electricity consumption, the indirect carbon emissions of various thermal and electric energy production units were calculated, and the key energy consumption process units and hotspot carbon flow paths were further found. This research established a theoretical and methodological basis for energy conservation and emission reduction. View Full-Text
Keywords: forestry-pulp and paper industry; production process; energy flow; carbon footprint; flowchart forestry-pulp and paper industry; production process; energy flow; carbon footprint; flowchart
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MDPI and ACS Style

Zhao, Q.; Ding, S.; Wen, Z.; Toppinen, A. Energy Flows and Carbon Footprint in the Forestry-Pulp and Paper Industry. Forests 2019, 10, 725.

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