MIL-160(Al) as a Candidate for Biogas Upgrading and CO₂ Capture by Adsorption Processes

Abstract

The microporous bioderived Al dicarboxylate MIL-160(Al) MOF in its shaped form has been evaluated as a candidate for biogas upgrading (BU) and/or carbon capture and storage (CCS) by studying adsorption isotherms of CO2, CH4, and N2 at 313, 343, and 373 K until 8 bar. The isotherms disclosed the following loading capacities: 4.2 (CO2), 2.07 (CH4), and 0.69 (N2) mol/kg at 5.8 bar and 313 K, which fitted with the dual-site Langmuir model. The linear-driving-force coefficients (LDFs) for CO2 and CH4 calculated from uptake rate experiments are in the order of 0.021–0.096 and 0.041–0.165 s–1 at 313 K between 0.11 and 2.76 bar, respectively. The Response Surface Methodology (RSM) was also applied to maximize the selectivity for mixtures CO2/CH4 and CO2/N2 with interest for BU or CCS. Breakthrough curve experiments with mixtures CO2/CH4 and CO2/N2 at the optimum selectivity conditions were developed and simulated using ASPEN Adsorption. This work clearly demonstrates the potential of MIL-160(Al) to be used in BU- and/or CCS-related applications.

Separation of CO2/N2 onto Shaped MOF MIL-160(Al) Using the Pressure Swing Adsorption Process for Post-combustion Application

“…The synthesis protocol and the main specifications of shaped MIL-160­(Al) were reported in a study by Cadiau et al, and Permyakova et al, also, the textural properties, the main characterization, and N 2 adsorption–desorption at 77 K can be found in a study by Karimi et al However, some of the main properties are represented in Table . Furthermore, the different gases, such as carbon dioxide (99.99%), nitrogen (99.95%), and helium (99.999%), were provided by L’Air Liquide.…”

“…Of note, a techno-economic synthesis evaluation of MIL-160(Al) demonstrated admissible cost values upon industrial-scale production . Additionally, fundamental adsorption properties of this 1D channel microporous solid, including adsorption capacity, selectivity, heat of adsorption, and kinetic assessment, have already proved the acceptable potential of MIL-160(Al) for CO 2 and N 2 separation for postcombustion application. , …”

“…48 To overcome these constraints, recently, some of us introduced the bioderived Al-based MOF MIL-160 as a robust microporous adsorbent in the shaped form which has been synthesized from the bioderived 2,5 FDCA (FDCA stands for furane dicarboxylic acid) ligand. 49,50 This sorbent also represents acceptable characteristics for the heat pump/chiller applications. 50−52 Besides that, this material can be produced under green ambient pressure conditions and shaped easily using wet granulation, 53 with production at an industrial scale.…”

“…55 Additionally, fundamental adsorption properties of this 1D channel microporous solid, including adsorption capacity, selectivity, heat of adsorption, and kinetic assessment, have already proved the acceptable potential of MIL-160(Al) for CO 2 and N 2 separation for postcombustion application. 49,56 1.4. Research Objective.…”

“…), , that contribute to developing sorbents with diverse domain in selectivity, kinetic, and thermodynamic. , In spite of the singular characteristics of MOFs, there are still some challenges in the way of development of these adsorbents, such as lack of chemical stability concerning the chemical agents, water vapor, or thermal shocks, as well as being in the powder form and the high synthesized cost. ,− However, other drawbacks are attributed to the amine-grafted MOFs, including amine loss all over the continuous operation, corrosion effect, and high energy consumption through the desorption step . To overcome these constraints, recently, some of us introduced the bioderived Al-based MOF MIL-160 as a robust microporous adsorbent in the shaped form which has been synthesized from the bioderived 2,5 FDCA (FDCA stands for furane dicarboxylic acid) ligand. , This sorbent also represents acceptable characteristics for the heat pump/chiller applications. − Besides that, this material can be produced under green ambient pressure conditions and shaped easily using wet granulation, with production at an industrial scale . Of note, a techno-economic synthesis evaluation of MIL-160­(Al) demonstrated admissible cost values upon industrial-scale production .…”