Systematic approach to determination of maximum achievable capture capacity via leaching and carbonation processes for alkaline steelmaking wastes in a rotating packed bed

Shu Yuan Pan, Pen Chi Chiang, Yi Hung Chen, Chun Da Chen, Hsun Yu Lin, E. E. Chang

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Accelerated carbonation of basic oxygen furnace slag (BOFS) coupled with cold-rolling wastewater (CRW) was performed in a rotating packed bed (RPB) as a promising process for both CO2 fixation and wastewater treatment. The maximum achievable capture capacity (MACC) via leaching and carbonation processes for BOFS in an RPB was systematically determined throughout this study. The leaching behavior of various metal ions from the BOFS into the CRW was investigated by a kinetic model. In addition, quantitative X-ray diffraction (QXRD) using the Rietveld method was carried out to determine the process chemistry of carbonation of BOFS with CRW in an RPB. According to the QXRD results, the major mineral phases reacting with CO2 in BOFS were Ca(OH)2, Ca2(HSiO4)(OH), CaSiO3, and Ca2Fe1.04Al0.986O5. Meanwhile, the carbonation product was identified as calcite according to the observations of SEM, XEDS, and mappings. Furthermore, the MACC of the lab-scale RPB process was determined by balancing the carbonation conversion and energy consumption. In that case, the overall energy consumption, including grinding, pumping, stirring, and rotating processes, was estimated to be 707 kWh/t-CO2. It was thus concluded that CO2 capture by accelerated carbonation of BOFS could be effectively and efficiently performed by coutilizing with CRW in an RPB.

Original languageEnglish
Pages (from-to)13677-13685
Number of pages9
JournalEnvironmental Science and Technology
Volume47
Issue number23
DOIs
Publication statusPublished - Dec 3 2013

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Basic oxygen converters
Carbonation
Steelmaking
Packed beds
slag
Slags
Leaching
Waste Water
Cold rolling
leaching
Oxygen
oxygen
Wastewater
wastewater
X-Ray Diffraction
Energy utilization
X-ray diffraction
Rietveld method
X ray diffraction
Calcium Carbonate

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Medicine(all)

Cite this

Systematic approach to determination of maximum achievable capture capacity via leaching and carbonation processes for alkaline steelmaking wastes in a rotating packed bed. / Pan, Shu Yuan; Chiang, Pen Chi; Chen, Yi Hung; Chen, Chun Da; Lin, Hsun Yu; Chang, E. E.

In: Environmental Science and Technology, Vol. 47, No. 23, 03.12.2013, p. 13677-13685.

Research output: Contribution to journalArticle

Pan, Shu Yuan ; Chiang, Pen Chi ; Chen, Yi Hung ; Chen, Chun Da ; Lin, Hsun Yu ; Chang, E. E. / Systematic approach to determination of maximum achievable capture capacity via leaching and carbonation processes for alkaline steelmaking wastes in a rotating packed bed. In: Environmental Science and Technology. 2013 ; Vol. 47, No. 23. pp. 13677-13685.
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