Influence of regeneration condition on cyclic CO2 capture using pre-treated dispersed CaO as high temperature sorbent

Stendardo Stefano, Calabrò Antonio

Research output: Contribution to conferencePaper

Abstract

In this experimental investigation the effect of calcination temperature and atmosphere composition on CO2 uptake of a solid sorbent have been analysed. The sorbent were synthesized by means of a CaO hydrolysis technique to generate sorbents with 75% and 85% of active phase CaO. The material at hand also contains a calcium aluminate phase acting as a binder of the active phase. Pre-treatment was accomplished in a thermo-gravimetric analyser (TGA) exposed in an atmosphere of 86% N2 and 14% CO2 under 600 °C. The as-synthesised sorbent and the pre-treated sorbent have been characterised by scanning electron microscope, nitrogen physic-sorption tests, and multi-cycling carbonation-calcination test in TGA (160 cycles). Here, the CO2 uptake took place at programmed temperature (600 °C) with three different regeneration condition tested: a) mild condition: regeneration under 900 °C with 14% CO2 and 86 % N2; b)moderately severe condition: regeneration under 1000 °C with 14% CO2 and 86 % N2; c) severe condition: regeneration under 1000 °C with 86% CO2 and 14 % N2. The experimental results show significant improvement in the stability of the CO2 uptake capacity over multiple cycles when comparing the synthetic sorbents to natural dolomite. For an instance, the 75% CaO synthetic sorbent shows a good reversibility for the CO2 uptake (0.13 g-CO2/g-sor) up to 150th cycle under severe condition.
Original languageEnglish
Publication statusPublished - 2012
Externally publishedYes
Event25th International Conference on Efficiency, Cost, Optimization and Simulation of Energy Conversion Systems and Processes, ECOS 2012 - , Italy
Duration: 1 Jan 2012 → …

Conference

Conference25th International Conference on Efficiency, Cost, Optimization and Simulation of Energy Conversion Systems and Processes, ECOS 2012
CountryItaly
Period1/1/12 → …

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Energy(all)
  • Environmental Science(all)

Cite this

Stefano, S., & Antonio, C. (2012). Influence of regeneration condition on cyclic CO2 capture using pre-treated dispersed CaO as high temperature sorbent. Paper presented at 25th International Conference on Efficiency, Cost, Optimization and Simulation of Energy Conversion Systems and Processes, ECOS 2012, Italy.