skip to main content
Show Results with:

The effect of steam on CO2 uptake and sorbent attrition in fluidised bed calcium looping: The influence of process conditions and sorbent properties

Coppola, Antonio et al.

Separation and purification technology. Volume 189: (2017, December 22nd); pp 101-107 -- Elsevier Science

Online access

  • Title:
    The effect of steam on CO2 uptake and sorbent attrition in fluidised bed calcium looping: The influence of process conditions and sorbent properties
  • Author: Coppola, Antonio;
    Allocca, Michele;
    Montagnaro, Fabio;
    Scala, Fabrizio;
    Salatino, Piero
  • Found In: Separation and purification technology. Volume 189: (2017, December 22nd); pp 101-107
  • Journal Title: Separation and purification technology
  • Subjects: Gaz--Séparation--Périodiques; Gaz--Épuration--Périodiques; Séparation (Technologie)--Périodiques; Chemicals--Purification--Periodicals; Electronic journals; Gases--Purification--Periodicals; Gases--Separation--Periodicals; Separation (Technology)--Periodicals; Gases--Purification; Gases--Separation; Periodicals; Separation (Technology); Calcium looping--Steam--Fluidised bed--Limestone--Attrition; Dewey: 660.284205
  • Rights: Licensed
  • Publication Details: Elsevier Science
  • Abstract: Graphical abstract Highlights The effect of steam during calcium looping tests using two sorbents was investigated. Relationships sorbent porosity/CO2capture/attrition were highlighted. Steam during carbonation increases the sorbent activity, contrasting sintering. Higher carbonation degrees lead to a particle structure more resistant to attrition. The positive effect of steam was confirmed for a different and more reactive sorbent. Abstract Calcium looping was investigated with a focus on the effect of exposure to steam during calcination and/or carbonation stages. Experiments were carried out using an Italian limestone in a lab-scale fluidised bed reactor. Calcium looping cycles were performed at temperatures of 940 and 650 °C and in atmospheres containing 70 and 15% CO2for calcination and carbonation stages, respectively. When present, steam accounted for 10% of the fluidising gas. CO2concentration in the flue gas was continuously monitored for the evaluation of the CO2capture capacity in each carbonation stage. The rate of fines generation by attrition during iterated carbonation and calcination stages was measured by collection of elutriated fines in filters at the exhaust. The extent of fragmentation was characterised by analysis of the particle size distribution of in-bed sorbent fragments after each calcination and carbonation stage. Porosimetric analyses on selected samples complemented the overall characterisation. Results of this investigation were compared with those obtained in a previous study on a different (more reactive) limestone sorbent with the aim of outlining a general mechanistic frame of the mutual relationships among the exposure to steam, sorbent microstructural features, CO2capture capacity and attrition. The propensity to attrition and fragmentation was specifically scrutinised, as it has been largely unexplored in the literature under operating conditions relevant to calcium looping.
  • Identifier: System Number: ETOCvdc_100068170374.0x000001; Journal ISSN: 1383-5866; 10.1016/j.seppur.2017.08.001
  • Publication Date: 2017
  • Physical Description: Electronic
  • Shelfmark(s): 8242.232000
  • UIN: ETOCvdc_100068170374.0x000001

Searching Remote Databases, Please Wait