High CO2 adsorption on amine-functionalized improved macro-/mesoporous multimodal pore silica

Yan, Huangyu; Xu, Ying; Zhang, Qiqi; Li, Jun; Li, Guoqiang; Zhao, Yuqiong; Wang, Ying; Zhang, Yongfa

doi:10.1016/j.fuel.2022.123195

Cited by 45 publications

(17 citation statements)

References 75 publications

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“…It is one of the most disastrous environmental problems and great interest to strip as much as CO 2 from industrial waste gases or the atmosphere for the serenity of global warming. Carbon capture and sequestration/storage technologies are considered to play a key role in reducing the emission [ 2 , 3 , 4 ]. Current post-combustion CO 2 capture technologies that have high repeatability and selectivity include the chemical absorption techniques like amine scrubbing [ 5 ], ionic liquid absorption [ 6 ] and the adsorption techniques that use physical adsorbents [ 7 , 8 ] or amine-, lithium- or calcium-based chemical adsorbents [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

Bai

Huang

et al. 2022

Molecules

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N-enriched porous carbons have played an important part in CO2 adsorption application thanks to their abundant porosity, high stability and tailorable surface properties while still suffering from a non-efficient and high-cost synthesis method. Herein, a series of N-doped porous carbons were prepared by a facile one-pot KOH activating strategy from commercial urea formaldehyde resin (UF). The textural properties and nitrogen content of the N-doped carbons were carefully controlled by the activating temperature and KOH/UF mass ratios. As-prepared N-doped carbons show 3D block-shaped morphology, the BET surface area of up to 980 m2/g together with a pore volume of 0.52 cm3/g and N content of 23.51 wt%. The optimal adsorbent (UFK-600-0.2) presents a high CO2 uptake capacity of 4.03 mmol/g at 0 °C and 1 bar. Moreover, as-prepared N-doped carbon adsorbents show moderate isosteric heat of adsorption (43–53 kJ/mol), acceptable ideal adsorption solution theory (IAST) selectivity of 35 and outstanding recycling performance. It has been pointed out that while the CO2 uptake was mostly dependent on the textural feature, the N content of carbon also plays a critical role to define the CO2 adsorption performance. The present study delivers favorable N-doped carbon for CO2 uptake and provides a promising strategy for the design and synthesis of the carbon adsorbents.

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Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

Bai

Huang

et al. 2022

Molecules

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“…Over the past few decades, many high-surface-area materials such as metal–organic frameworks (MOFs) [ 13 , 14 ], zeolites [ 15 ], porous polymers [ 16 , 17 , 18 ], amine-modified materials [ 19 , 20 ], covalent–organic frameworks (COFs) [ 21 ], and different forms of porous carbons [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ] have been explored as possible CO 2 adsorbents. Among these, porous carbon adsorbents are considered to be the most promising based on their superb characteristics such as regulated porous structure, abundant precursors, robustness, high surface area, high hydrophobicity, and energy-efficient recovery where much less energy is required for regeneration compared to conventional capture techniques [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of Melamine Formaldehyde Resin-Derived N-Doped Porous Carbon for CO2 Capture Application

Bai

Huang

et al. 2023

Molecules

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The design and synthesis of porous carbons for CO2 adsorption have attracted tremendous interest owing to the ever-soaring concerns regarding climate change and global warming. Herein, for the first time, nitrogen-rich porous carbon was prepared with chemical activation (KOH) of commercial melamine formaldehyde resin (MF) in a single step. It has been shown that the porosity parameters of the as-prepared carbons were successfully tuned by controlling the activating temperature and adjusting the amount of KOH. Thus, as-prepared N-rich porous carbon shows a large surface area of 1658 m2/g and a high N content of 16.07 wt%. Benefiting from the unique physical and textural features, the optimal sample depicted a CO2 uptake of up to 4.95 and 3.30 mmol/g at 0 and 25 °C under 1 bar of pressure. More importantly, as-prepared adsorbents show great CO2 selectivity over N2 and outstanding recyclability, which was prominently important for CO2 capture from the flue gases in practical application. An in-depth analysis illustrated that the synergetic effect of textural properties and surface nitrogen decoration mainly determined the CO2 capture performance. However, the textural properties of carbons play a more important role than surface functionalities in deciding CO2 uptake. In view of cost-effective synthesis, outstanding textural activity, and the high adsorption capacity together with good selectivity, this advanced approach becomes valid and convenient in fabricating a unique highly efficient N-rich carbon adsorbent for CO2 uptake and separation from flue gases.

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“…Among CCS technologies, solid adsorbents adsorption technology has become a focus of current research because it is economical and eco-friendly and provides high energy efficiency and convenient operation. In the past few years, several research groups have designed new solid adsorbents with various pore structures for application in CO 2 capture and storage, including porous carbon [4], silica [5,6], zeolite [7], metal oxide [8], metal organic frameworks (MOFs) [9], and covalent organic frameworks (COFs) [10]. The research discovered that the adsorption process could be controlled by tailoring the pore structure, and the adsorption efficiency and selectivity could be improved by modifying the surface properties of these pore materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hierarchically Ordered Porous Silica Materials for CO2 Capture: The Role of Pore Structure and Functionalized Amine

Jin

Zhang

et al. 2022

Inorganics

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Hierarchically ordered porous silica materials (HSMs) with a micro/mesoporous structure were successfully prepared with the sol-gel method using dextran, dextran/CTAB, and CTAB as templates. The obtained hierarchically structured silica was successfully modified with amine groups through post-grafting and one-pot methods. Their architectural features and texture parameters were characterized by XRD, N2 adsorption–desorption isotherms, SEM, TEM, FTIR, and TGA techniques. The results demonstrated that the pore structure depended on the reaction temperature and the amount of CTAB added in the synthesis procedure. A series of porous silica with hierarchical pore structures possessed abundant micropores, ordered mesopores, and a tunable surface area and pore volume. After modification, the ordered structure of the hierarchical porous silica almost disappeared due to the presence of amine groups in the pore channel. Furthermore, to explore the effect of pore structures and amine groups on CO2 adsorption performance, before and after amine modification of HSMs, adsorbents were evaluated regarding the capacity of collecting CO2 for comparison. According to these results, the varying microporous content, pore size distribution, and density of the amine groups were important factors determining the capacity of CO2 capture.

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High CO2 adsorption on amine-functionalized improved macro-/mesoporous multimodal pore silica

Cited by 45 publications

References 75 publications

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

One-Pot Synthesis of Melamine Formaldehyde Resin-Derived N-Doped Porous Carbon for CO2 Capture Application

Synthesis of Hierarchically Ordered Porous Silica Materials for CO2 Capture: The Role of Pore Structure and Functionalized Amine

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