Adsorption of CO₂, CH₄, and N₂ on Ordered Mesoporous Carbon: Approach for Greenhouse Gases Capture and Biogas Upgrading

Abstract

Separation of CO₂ and N₂ from CH₄ is significantly important in natural gas upgrading, and capture/removal of CO₂, CH₄ from air (N₂) is essential to greenhouse gas emission control. Adsorption equilibrium and kinetics of CO₂, CH₄, and N₂ on an ordered mesoporous carbon (OMC) sample were systematically investigated to evaluate its capability in the above two applications. The OMC was synthesized and characterized with TEM, TGA, small-angle XRD, and nitrogen adsorption/desorption measurements. Pure component adsorption isotherms of CO₂, CH₄, and N₂ were measured at 278, 298, and 318 K and pressures up to 100 kPa, and correlated with the Langmuir model. These data were used to estimate the separation selectivities for CO₂/CH₄, CH₄/N₂, and CO₂/N₂ binary mixtures at different compositions and pressures according to the ideal adsorbed solution theory (IAST) model. At 278 K and 100 kPa, the predicted selectivities for equimolar CO₂/CH₄, CH4/N₂, and CO₂/N₂ are 3.4, 3.7, and 12.8, respectively; and the adsorption capacities for CH₄ and CO₂ are 1.3 and 3.0 mmol/g, respectively. This is the first report of a versatile mesoporous material that displays both high selectivities and large adsorption capacities for separating CO₂/CH₄, CH₄/N₂, and CO₂/N₂ mixtures.

Biogas Management: Advanced Utilization for Production of Renewable Energy and Added-value Chemicals

“…Upgrading strategies are mostly based on physical and/or chemical absorption in water or in active aqueous solutions (Cebula, 2009;Petersson and Wellinger, 2009;Kismurtono, 2011;Ryckebosch et al, 2011;Bansal et al, 2013;Khalil et al, 2014;Kohl and Nielsen, 1997) or adsorption on solid surfaces (Pandey and Fabian, 1989;Dabrowski, 2001;Jee et al, 2001;Yang, 2003;Himeno et al, 2005;Grande and Rodrigues, 2007;Ma et al, 2007;Cavenati et al, 2008;Das et al, 2008;Alonso-Vicario et al, 2010;Tippayawong and Thanompongchart, 2010;Grande, 2011Grande, , 2012Yuan et al, 2013;Andriani et al, 2014), membrane separation methods (Wellinger and Lindberg, 2005;Favre et al, 2009;Petersson and Wellinger, 2009;Simons et al, 2009;Deng and Hagg, 2010;Makaruk et al, 2010;Ryckebosch et al, 2011;Andriani et al, 2014;Salihu and Alam, 2015), and biological methods (Ryckebosch et al, 2011;Andriani et al, 2014;Salihu and Alam, 2015) or even combinations of the above (Bansal et al, 2013).…”

“…Adsoprtion-based removal of CO 2 from biogas is widely practiced and commercially applied at both pilot and demonstration plant levels and is still an active research subject (Cavenati et al, 2008;Cebula, 2009;Petersson and Wellinger, 2009;Alonso-Vicario et al, 2010;Tippayawong and Thanompongchart, 2010;Grande, 2011;Montanari et al, 2010;Grande, 2012;Ryckebosch et al, 2011;Yuan et al, 2013;Andriani et al, 2014). The techniques used include PSA and TSA, both involving two packed-bed columns in a swing-type arrangement employing appropriate valve sequencing, as shown schematically in Figure 2.…”

Adsorption of benzene, cyclohexane and hexane on ordered mesoporous carbon

“…They proved that a mesoporous carbon with high surface area, large pore volume and bimodal pores showed the highest adsorption capacity among three selected OMCs with different pore structures. Recently, Yuan et al (2013) adopted OMC as an adsorbent for the separation of CO 2 and N 2 from CH 4 , and the results indicated that OMC is a useful adsorbent, displaying both high selectivity and large adsorption capacity. These relevant studies indicate the superior adsorption properties of OMC.…”

CO2 Capture Behaviors of Amine-Modified Resorcinol-Based Carbon Aerogels Adsorbents

“…Developing simple and low cost methods to synthesize highly porous materials with suitable properties for CO 2 capture has raised comprehensive concerns. On account of the unique pore structure, surface property, low cost, high thermal stability and low sensitivity to moisture, carbonaceous materials such as activated carbons (Alababi et al, 2015;Sethia and Sayari, 2015;Shahkarami et al, 2015), ordered mesoporous carbons (Liu et al, 2011;Wei et al, 2013;Yuan et al, 2013) and graphene Lee and Park, 2014;Chowdhury and Balasubramanian, 2016) have been extensively used for CO 2 capture. Zeolites with highly crystalline structure, high surface area, and 3-dimensional pore structures by altering their composition as Si/Al ratio have been widely applied as CO 2 adsorbents (Yu et al, 2012;Lee et al, 2013).…”