Sodium-based dry regenerable sorbent for carbon dioxide capture from power plant flue gas

Joong B. Lee, Chong K. Ryu, Jeom In Baek, Ji H. Lee, Tae H. Eom, Sung Hyun Kim

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

Dry regenerable sorbent technology is one of the emerging technologies as a cost-effective and energy-efficient technology for CO2 capture from flue gas. Six sodium-based dry regenerable sorbents were prepared by spray-drying techniques. Their physical properties and reactivities were tested to evaluate their applicability to a fluidized-bed or fast transport-bed CO 2 capture process. Each sorbents contained 20-50 wt% of Na 2CO3 or NaHCO3. All sorbents except for Sorb NX30 were insufficient with either attrition resistance or reactivity, or both properties. Sorb NX30 sorbent satisfied most of the physical requirements for a commercial fluidized-bed reactor process along with good chemical reactivity. Sorb NX30 sorbent had a spherical shape, an average size of 89 μm, a size distribution of 38-250 μm, and a bulk density of approximately 0.87 g/mL. The attrition index (AI) of Sorb NX30 reached below 5% compared to about 20% for commercial fluidized catalytic cracking (FCC) catalysts. CO2 sorption capacity of Sorb NX30 was approximately 10 wt % (>80% sorbent utilization) in the simulated flue gas condition compared with 6 of 30 wt % MEA solution (33% sorbent utilization). All sorbents showed almost-complete regeneration at temperatures less than 120 °C.

Original languageEnglish
Pages (from-to)4465-4472
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume47
Issue number13
DOIs
Publication statusPublished - 2008 Jul 2

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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