Preprint Article Version 1 NOT YET PEER-REVIEWED

Promoting Effect of Inorganic Alkali on Carbon Dioxide Adsorption in Amine-Modified MCM-41

  1. Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China
  2. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
Version 1 : Received: 22 August 2016 / Approved: 22 August 2016 / Online: 22 August 2016 (05:47:02 CEST)

A peer-reviewed article of this Preprint also exists.

Teng, Y.; Li, L.; Xu, G.; Zhang, K.; Li, K. Promoting Effect of Inorganic Alkali on Carbon Dioxide Adsorption in Amine-Modified MCM-41. Energies 2016, 9, 667. Teng, Y.; Li, L.; Xu, G.; Zhang, K.; Li, K. Promoting Effect of Inorganic Alkali on Carbon Dioxide Adsorption in Amine-Modified MCM-41. Energies 2016, 9, 667.

Journal reference: Energies 2016, 9, 667
DOI: 10.3390/en9090667

Abstract

Three kinds of inorganic alkali are introduced into tetraethylenepentamine (TPEA) and polyethyleneimine (PEI) modified MCM-41 as the CO2 adsorbents. FT-IR and TGA are used to characterize the surface groups and the thermal stability of adsorbents. Chemical titration method is used to measure the alkali amounts of adsorbents. Thermo-gravimetric analysis with 10%CO2/N2 as the simulated flue gas is used to test the CO2 adsorption performance of adsorbents. The results show that all three kinds of inorganic alkali containing adsorbents exhibit promoted CO2 adsorption capability than traditional TPEA and PEI modified samples. Ca(OH)2 and PEI modified samples exhibit the highest adsorption capacity and stable regeneration property. The introduction of inorganic alkali changes the chemical adsorption mechanism between CO2 and increases the effective alkali amounts due to its hydroxyl groups. The CO2 adsorption capacities have a linear dependence relation with the alkali amounts of adsorbents, indicating that alkali amount is a critical factor for novel adsorbents exploring.

Subject Areas

amine-modified MCM-41; CO2 adsorption; inorganic alkali; alkali amounts

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