Fly ash zeolites as a dual system for simultaneous CO2capture and its utilization in the production of synthetic gas

Abstract

The deepening of global environmental problems caused by carbon emissions (CO2) generated by various industries requires the development of technological solutions to limit their emitting into the atmosphere. Electrical power plants that use organic fuels as a primary energy source are serious emitter of CO2. The current legislation prerequisites the implementation of technologies for carbon capture and utilization (CCU - Carbon Capture and Utilization) situated at the plant site. In our previous studies, we successfully applied the zeolites synthesized from fly ash obtained from combustion of lignite coal as solid adsorbents for selective capture of CO2 in equilibrium and dynamic conditions. The aim of this study is upgrading of the fly ash zeolite utilization in a dual system for simultaneous carbon capture and CO2 utilization for production of synthetic gas. Experiments were performed in a stainless steel laboratory reactor Büchiglasuster Miniclave 100 in equilibrium conditions at CO2 pressure of 0.25 MPa with different duration. The solid samples saturated with CO2 and reaction products were extracted from the reactor and subjected to gravimetric analyses and Furier-transform infrared spectroscopy (FTIR). The characteristic vibrations of C2H2n+2 molecules were observed onto FTIR spectra of the samples after their exposure for long time.