Techno-economic analysis of ECF bleaching and TCF bleaching for a bleached eucalyptus kraft pulp mill

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Tiago De Assis
  • Jordan Perrin
  • Asan Jameel
  • Richard Phillips
  • Dominique Lachenal
  • Adrianna Kirkman
  • Onalds Gonzalez

Research units

  • North Carolina State University
  • LGP2
  • Helsinki School of Economics

Abstract

An early stage techno-economic analysis was performed to compare a traditional elemental chlorine free (ECF) sequence (O O D0 [EOP] D1 P) with the proposed totally chlorine free (TCF) sequence (O O A [ZEO]1 [ZEO]2 P)] for a bleached eucalyptus kraft pulp mill. Similar operating costs (ECF = US$465/a.d. metric ton; TCF = US$468/a.d. metric ton) and similar internal rate of return (ECF = 16.5%; TCF = 16.4%) were obtained. Although the TCF case has lower revenue with surplus steam, savings with chemicals (e.g., sodium chlorate and methanol) pays for the higher consumption of electricity. Probabilistic analyses were also performed to evaluate the financial risks associated with the variability of chemical costs and electricity price. Probabilistic analyses have shown that the price volatility of sodium hydroxide and sodium chlorate have a significant impact on the probability distribution of internal rate of return (IRR). Despite its promising potential, the new TCF sequence has only been tested in laboratory scale and further scaleup has to be performed to validate the technology. However, the techno-economic economic analysis shows that the proposed TCF technology has promising potential for future industrial application.

Details

Original languageEnglish
Pages (from-to)583-594
Number of pages12
JournalTAPPI Journal
Volume16
Publication statusPublished - 1 Oct 2017
MoE publication typeA1 Journal article-refereed

ID: 32040758