Investigation of Ester- and Amide-Linker-Based Porous Organic Polymers for Carbon Dioxide Capture and Separation at Wide Temperatures and Pressures

Abstract

Organic compounds, such as covalent organic framework, metal-organic frameworks, and covalent organic polymers have been under investigation to replace the well-known amine-based solvent sorption technology of CO2 and introduce the most efficient and economical material for CO2 capture and storage. Various organic polymers having different function groups have been under investigation both for low and high pressure CO2 capture. However, search for a promising material to overcome the issues of lower selectivity, less capturing capacity, lower mass transfer coefficient and instability in materials performance at high pressure and various temperatures is still ongoing process. Herein, we report synthesis of six covalent organic polymers (COPs) and their CO2, N2, and CH4 adsorption performances at low and high pressures up to 200 bar. All the presented COPs materials were characterized by using elemental analysis method, Fourier transform infrared spectroscopy (FTIR) and solid state nuclear magnetic resonance (NMR) spectroscopy techniques. Physical properties of the materials such as surface areas, pore volume and pore size were determined through BET analysis at 77 K. All the materials were tested for CO2, CH4, and N2 adsorption using state of the art equipment, magnetic suspension balance (MSB). Results indicated that, amide based material i.e. COP-33 has the largest pore volume of 0.2 cm(2)/g which can capture up to the maximum of 1.44 mmol/g CO2 at room temperature and at pressure of 10 bar. However, at higher pressure of 200 bar and 308 K ester-based compound, that is, COP-35 adsorb as large as 144 mmol/g, which is the largest gas capturing capacity of any COPs material obtained so far. Importantly, single gas measurement based selectivity of COP-33 was comparatively better than all other COPs materials at all condition. Nevertheless, overall performance of COP-35 rate of adsorption and heat of adsorption has indicated that this material can be considered for further exploration as efficient and cheaply available solid sorbent material for CO2 capture and separation.

Gas Solubility and Rheological Behavior of Natural Deep Eutectic Solvents (NADES) via Combined Experimental and Molecular Simulation Techniques

“…One of the major drawbacks of the current state‐of‐the‐art CO 2 capture methods by using aqueous solutions of amines by means of carbamate formation is water uptake in the gas stream, solvent degradation and solvent loss, corrosion and high energy requirement at the solvent regeneration stages . Due to their negligible vapor pressure, and less corrosive nature ILs are considered as a viable alternatives for CO 2 scrubbing in the recent years, being tested both as pure compounds and as mixtures .…”

Design of a Peripheral Building Block for H-Bonded Dendritic Frameworks and Analysis of the Void Space in the Bulk Dendrimers

“…The use of the triazine moiety in COFs was recently reported 65–70 . Particularly, the azaheterocyclic moiety integrated in a covalent triazine-based framework exhibits catalytic activity 68–70 .…”

“…Particularly, the azaheterocyclic moiety integrated in a covalent triazine-based framework exhibits catalytic activity 68–70 . A framework made of piperazine and triazine units with a BET area of ~165 m 2 /g was found to have the CO 2 sorption capacity as high as 5616 mg/g at 200 bar and 65 °C 65 .…”

Morphological Diversity in Nanoporous Covalent Organic Materials Derived from Viologen and Pyrene

“…Both polymeric materials are nanoporous, cationic, and highly stable in water, even in the presence of acid (1 M HCl) or base (1 M NaOH). Their porosity and ionic surfaces are responsible for high affinities and adsorption capacities for iodine vapor.Porous covalent organic polymers (COPs) are well known for their diverse applications in fields such as gas storage and separation, [1][2][3][4] catalysis, [5][6][7][8] sensing, [9,10] drug delivery, [11] and environmental remediation. [12] In order to design COPs with improved functionality, considerable research has been undertaken to understand the relationship between the morphologies and properties of these materials.…”