Experiment investigation of CO2 regeneration properties for JLOX500 and 13X in various ways

Abstract

This work presented a comparative study of CO2 regeneration for two kinds of X zeolites (JLOX500 and 13X) in different ways, such as vacuum, CH4 purge and heating regeneration. The materials characteristics of samples were determined by EDS and BET. The adsorption capacities of CO2 for original and regenerated samples were identified as the single-point adsorption dosing CO2 at 800 kPa. The results showed that JLOX500 had larger original adsorption capacity (OAC) of CO2 (4.83 mmol/g) than that of 13X (4.10 mmol/g). In vacuum regeneration, the regenerated adsorption capacities (RAC) of CO2 for both samples were almost same at all vacuum pressures (1 ~ 100 kPa); in CH4 purge regeneration, the regeneration degree (RD) for both samples were identical to each other with the flowrates (50 ~ 300 mL/min); in heating regeneration, JLOX500 had larger RACs than 13X at temperatures (50 ~ 300 °C), but had less RDs. The RACs and RDs for JLOX500 and 13X both increased as the regeneration time was prolonged. 13X would be more efficient adsorbent in the vacuum regeneration, whereas JLOX500 performed better in purge and heating regeneration.