CO2 Adsorption Performance on Surface-Functionalized Activated Carbon Impregnated with Pyrrolidinium-Based Ionic Liquid

Abstract

The serious environmental issues associated with CO2 emissions have triggered the search for energy efficient processes and CO2 capture technologies to control the amount of gas released into the atmosphere. One of the suitable techniques is CO2 adsorption using functionalized sorbents. In this study, a functionalized activated carbon (AC) material was developed via the wet impregnation technique. The AC was synthesized from a rubber seed shell (RSS) precursor using chemical activation and was later impregnated with different ratios of [bmpy][Tf2N] ionic liquid (IL). The AC was successfully functionalized with IL as confirmed by FTIR and Raman spectroscopy analyses. Incorporation of IL resulted in a reduction in the surface area and total pore volume of the parent adsorbent. Bare AC showed the largest SBET value of 683 m2/g, while AC functionalized with the maximum amount of IL showed 14 m2/g. A comparative analysis of CO2 adsorption data revealed that CO2 adsorption performance of AC is majorly affected by surface area and a pore-clogging effect. Temperature has a positive impact on the CO2 adsorption capacity of functionalized AC due to better dispersion of IL at higher temperatures. The CO2 adsorption capacity of AC (30) increased from 1.124 mmol/g at 25 °C to 1.714 mmol/g at 40 °C.

Performance of ionic liquid functionalized metal organic frameworks in the adsorption process of phenol derivatives

“…This indicates that, because of the functional groups of the ionic liquid, the surface of the adsorbent material receives a greater number of actives sites, which improves the adsorption ability. 57–60 Additionally, environmental research routinely uses computational methods to help experiments in order to speed them up and save expenses and resources. 61…”

“…This indicates that, because of the functional groups of the ionic liquid, the surface of the adsorbent material receives a greater number of actives sites, which improves the adsorption ability. [57][58][59][60] Additionally, environmental research routinely uses computational methods to help experiments in order to speed them up and save expenses and resources. 61 The adsorption capacity function of the anion from the ionic liquid structure increases in the order Cl − > NO 3 − > OTF − , indicating that the Cl − anions lead to the highest surface charge density of the adsorbent surface.…”

Adsorption of CO2 on Activated Carbon, Fe‐Based Metal Organic Framework, ZnO, and CaO for Carbon Capture and Storage Application

“…As the adsorbent dosage is increased, the pore‐clogging effect becomes prominent. For higher adsorbent dosage, the CO 2 adsorption capacity was reduced due to pore‐clogging effect and poor diffusion due to the active phase layer of the adsorbent 44.…”

Alcoholamine-Grafted Zinc Oxide Enhances CO2 Electroreduction at Elevated Temperatures

“…Surface functionalization using small molecules ,− has been greatly utilized in carbon capture and storage (CCS) technology. − The ligands on the catalyst surface can improve the CO 2 adsorption by tuning its CO 2 binding strength and adding new adsorption sites . Modification of catalyst surfaces with organic ligands of different electronic and site-resistance properties could also improve the catalytic activity through enhanced and enriched interfacial electronic effects. ,,, Under mesophilic conditions (70–90 °C), the chemisorption associated with the incorporated amino groups can improve the adsorbent performance. , Considering the above, we propose improving the catalytic performance by adding surface ligands on the catalysts.…”

“…11,13,14,18 Under mesophilic conditions (70−90 °C), the chemisorption associated with the incorporated amino groups can improve the adsorbent performance. 19,20 Considering the above, we propose improving the catalytic performance by adding surface ligands on the catalysts.…”