Kinetic modeling on CO2 capture using basic oxygen furnace slag coupled with cold-rolling wastewater in a rotating packed bed

E. E. Chang, Tse Lun Chen, Shu Yuan Pan, Yi Hung Chen, Pen Chi Chiang

研究成果: 雜誌貢獻文章同行評審

42 引文 斯高帕斯(Scopus)

摘要

In this study, direct and indirect carbonation of basic oxygen furnace slag (BOFS) coupled with cold-rolling wastewater (CRW) was carried out via a rotating packed bed (RPB). The solid products were qualitatively characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) and quantitatively analyzed with thermogravimetric analysis (TGA). The leachate was analyzed with inductively coupled plasma-optical emission spectroscopy (ICP-OES). The results indicate that the maximum achievable carbonation conversion (MACC) of BOFS was 90.7%, corresponding to a capture capacity of 0.277g CO2/g of BOFS, by direct carbonation with CRW under a rotation speed of 750rpm at 30°C for 20min. In addition, CO2 mass balance among the gas, liquid, and solid phases within an RPB was well-developed, with an error less than 10%, to confirm the actual CO2 capture capacity of BOFS with precision and accuracy. Furthermore, a reaction kinetic model based on mass balance was established to determine the reaction rate constant for various liquid agents (CRW and pure water). It was concluded that co-utilization of alkaline wastes including BOFS and CRW via the RPB is a novel approach for both enhancing CO2 capture capacity and reducing the environmental impacts of alkaline wastes.
原文英語
頁(從 - 到)937-946
頁數10
期刊Journal of Hazardous Materials
260
DOIs
出版狀態已發佈 - 九月 15 2013

ASJC Scopus subject areas

  • 健康、毒理學和誘變
  • 污染
  • 廢物管理和處置
  • 環境化學
  • 環境工程

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