The potential of biocarbon as CO 2 adsorbent in VPSA unit
- PDF / 1,257,368 Bytes
- 7 Pages / 595.276 x 790.866 pts Page_size
- 13 Downloads / 152 Views
The potential of biocarbon as CO2 adsorbent in VPSA unit Izabela Majchrzak‑Kucęba1 · Marcelina Sołtysik1 Received: 14 September 2019 / Accepted: 16 May 2020 © The Author(s) 2020
Abstract The best solution to the main environmental problem seems to be C O2 capture to reduce greenhouse gas emissions. The activated carbons derived from biomass have attracted extensive attention as solid adsorbent for carbon dioxide capture process. In this work, we focus on examining the properties of biochar (non-activated porous carbon) produced from biomass. Physicochemical properties of the biochar were investigated by thermogravimetric analysis (TG), Fourier transform infrared spectroscopy, scanning electron microscopy and N2 adsorption–desorption at 77 K. In order to evaluate the possibility of using biocarbons for CO2 adsorption in large-scale VPSA units, investigations of these adsorbents in laboratory are necessary. The paper present the potential of biochar for C O2 capture in VPSA unit. The examination of the C O2 sorptive capability, stability and regeneration performance of biochar was carried out using a Mettler-Toledo TGA/SDTA 851e thermobalance and TG-Vacuum system. The sorption of CO2 was carried out isothermally in a flow of a mixture of gasses: CO2 (100 vol.%) and CO2 (16 vol.%)/N2 (84 vol.%). The commercial biochar showed a sorption performance for C O2 up to 26.4 mg C O2 g−1 adsorbent at 30 °C and 30 bar. Repeated use of the adsorbent in the sorption/desorption cycle did not affect its performance, which indicates high sorption stability. Keywords Biocarbon · Carbon dioxide · Adsorption · TG-Vacuum · VPSA
Introduction Carbon dioxide emissions resulting from the burning of fossil fuels and industrial activities are now the main cause of adverse changes in the atmosphere. As a result of higher energy demand, the level of carbon dioxide emissions in the world has reached a record level in history—37 billion tonnes in 2018 [1]. From the analysis of the carbon balance in the biosphere, it is clear that there is an incredible variation between carbon dioxide emission in the form of carbon dioxide to the atmosphere and its assimilation by sources on Earth [2]. The reduction in greenhouse gas emissions, including C O2, is now becoming the main goal of the European Union. Among the currently available methods, post-combustion CO2 capture plays a leading role due to the possibility of modernization of already existing power plants [3]. The method of post-combustion C O2 capture includes * Izabela Majchrzak‑Kucęba [email protected] 1
Faculty of Infrastructure and Environment, Institute of Advanced Energy Technologies, Czestochowa University of Technology, Czestochowa, Poland
absorption by aqueous solutions, adsorption by solid materials and membrane separation. Among them, the adsorption method is advantageous due to the low energy consumption and easy regeneration of the adsorbent, without producing adverse by-products or contaminated sorbents [4–7]. Activated carbon, zeolites and metal–orga
Data Loading...
