Operation of a cyclonic preheater in the Ca-looping for CO2 capture

Environ Sci Technol. 2013 Oct 1;47(19):11335-41. doi: 10.1021/es401601k. Epub 2013 Sep 20.

Abstract

Calcium looping is an emerging technology for CO2 capture that makes use of the calcium oxide as a sorbent. One of its main issues is the significant energy consumption in the calciner, where the regeneration of the sorbent takes place. Nevertheless, as a high temperature looping technology, the surplus heat flows may be used to reduce the energy needs in this reactor. The addition of a cyclonic preheater similar to those used in the cement industry is proposed in this work. A calcium looping system was modeled and simulated to assess the advantages and disadvantages of the inclusion of a cyclonic preheater. Despite the negative effect on the maximum average capture capacity of the sorbent, a reduction on the coal and oxygen consumptions and on the extra CO2 generated in the calciner is obtained.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Air Pollutants / chemistry*
  • Air Pollution / prevention & control*
  • Calcium / chemistry*
  • Carbon Dioxide / chemistry*
  • Coal
  • Oxygen / chemistry
  • Power Plants*

Substances

  • Air Pollutants
  • Coal
  • Carbon Dioxide
  • Oxygen
  • Calcium