Surfaces and Interfaces
·
2025
·
IF 6.3
Chunsheng Liu,Wenjuan Chen,Siqi Lan,Yali Wang,Qunyan Li,Qi Wei,Zuoren Nie
Developing advanced materials for CO 2 adsorption is of great significance to reduce global warming caused by the continuous increase in CO₂ emissions. In the present work, hierarchical porous cellulose aerogels were prepared via the sol-gel and freeze-drying techniques using low-cost cellulose powder. The morphology, pore structure, phase, surface chemical composition, and adsorption performance for pure CO 2 and CO 2 in the simulated cement plant flue gas were investigated in detail. The results show that the obtained cellulose aerogels possess a high specific surface area, ranging from 62.45 to 124.9 m²/g, and exhibit a hierarchical porous structure. The samples with a cellulose powder concentration of 6wt% and undergoing the freeze-thaw process (denoted as 6CAF) demonstrates a maximum static adsorption capacity of 2.5 mmol/g at 25°C for pure CO 2 , and a breakthrough capacity of 3.5 mmol/g for the CO 2 in the simulated cement plant flue gas at 25°C. Upon the cycling adsorption, the 6CAF cellulose aerogels manifest desirable reusability except for the first cycle, where the residual sodium hydroxide from the preparation process plays a critical role in the CO 2 adsorption, leading to a chemical adsorption of CO 2 . The physical adsorption of CO 2 dominates in the subsequent cycles. This work provides a low-cost alternative for CO 2 adsorption, especially for that in the simulated cement plant flue gas.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Feng-Mei Xie,Xi-Yue Li,Dong-Liang Zhong,Peter Englezos,Guo-Xiang Lu
This work presents data on the phase behavior of tetra-n-butyl phosphonium bromide (TBPB) semiclathrate hydrate formed in the presence of CO2 at a stoichiometric concentration (2.57 mol % TBPB). A high pressure microdifferential scanning calorimeter (HP μ-DSC) was employed to measure the phase equilibrium data and identify the dissociation behaviors of TBPB + CO2 semiclathrate hydrate. It was found that the phase equilibrium conditions for TBPB + CO2 semiclathrate hydrate formed at 2.57 mol % TBPB were lower than CO2 hydrate formed in pure water and TBPB + CO2 semiclathrate hydrate formed at 0.5 mol % TBPB. The coexistence of CO2 hydrate (sI) and TBPB + CO2 semiclathrate were identified in the 2.57 mol % TBPB solution. When adding 500 ppm sodium dodecyl sulfate (SDS) into the 2.57 mol % TBPB solution, CO2 hydrate disappeared and more TBPB + CO2 semiclathrate hydrate was formed. However, under the same temperature and pressure conditions, CO2 consumption during the formation of TBPB + CO2 semiclathrate hydrate was reduced when 500 ppm of SDS was added to the 2.57 mol % TBPB solution. Therefore, future work should aim to increase the CO2 storage capacity of TBPB semiclathrate hydrate.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Mazhar Khan,Zeeshan Akmal,Muhammad Tayyab,Seemal Mansoor,Dongni Liu,Ziwei Ye,Jinlong Zhang,Shiqun Wu,Lingzhi Wang
The rational design of heterojunction photocatalysts is crucial for enhancing CO 2 photoreduction efficiency, yet precisely channeling photogenerated electrons to the CO 2 adsorption sites remains an enormous challenge. In this work, we developed an organic-inorganic heterostructure with continuous inter- and intra-component electric fields. The integration of BiOBr with MIL-125 via chemical bonding established a heterojunction, where the built-in electric field between the two components facilitated the efficient transfer of photogenerated electrons from BiOBr to MIL-125. The intrinsic electric field of MIL-125 further drove the accumulation of photogenerated electrons at Ti sites. This tandem electric field effect, in conjunction with the CO 2 adsorption and activation at Ti sites, significantly enhanced the efficiency of CO 2 reduction within the heterojunction system. The optimized photocatalyst achieving CO production at a rate of 65.6 μmol g −1 h −1 with nearly 90 % selectivity without the use of sacrificial agents, exhibiting a remarkable 43-fold and 8-fold enhancement in activity compared to pristine MIL-125 and BiOBr, respectively. In-situ infrared spectroscopy and theoretical calculations confirmed the energy optimization effect of the heterostructure on CO 2 activation and the hydrogenation reaction, facilitating the formation of the key intermediate *COOH. This work elucidates the mechanism by which tandem built-in electric fields facilitate charge separation.
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高影响因子
ENERGY
·
2025
·
IF 9.4
Yimin Xiong,Minruo Guo,Xuepeng Wang,Zhe Xiong,Wei Deng,Kai Xu,Long Jiang,Sheng Su,Song Hu,Yi Wang,Jun Xiang
Co-electrolysis of bio-oil (derived from the fast pyrolysis of lignocellulosic biomass) and CO 2 to produce sustainable and carbon-neutral chemicals offers a promising approach for simultaneous bio-oil upgrading and CO 2 fixation. Despite variations in raw materials, bio-oil shares common functional groups, comprising aromatic-poor fractions (APF, mainly from cellulose and hemicellulose) and aromatic-rich fractions (ARF, mainly from lignin), whose interactions significantly influence the electrochemical upgrading of bio-oil. In this study, building on our previously proposed method of co-electrolysis of bio-oil and CO 2 , we further investigated the roles of the interactions between APF and ARF on bio-oil upgrading and CO 2 fixation. Results showed that the interactions suppressed CO 2 fixation, promoted CO 2 conversion, improved product selectivity of organic acids, and inhibited polymerization. Notably, the interactions between acetophenone and ARF significantly enhanced the formation of organic acids, with a 136.55 % increase in their content. Furthermore, the interactions facilitated the conversion of larger molecular compounds (350–450 Da) into smaller molecular compounds (<300 Da) during co-electrolysis of bio-oil and CO 2 . In conclusion, we proposed a mechanism for bio-oil upgrading and CO 2 conversion, influenced by interactions between APF and ARF during the co-electrolysis, providing valuable insights into the synergistic processing of bio-oil from various sources with CO 2 .
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Surfaces and Interfaces
·
2024
·
IF 5.7
Jiawei Zhou,Ming Liu,Xue Chen,Shiyang Bai,Jihong Sun
The purification and separation of CO 2 , CH 4 , and N 2 from biogas, flue gas, and coalbed gas for carbon capture and storage are main technology in mitigating the greenhouse effect. The Mg-MOF-74@clinoptilolite (Mg-MOF-74@CP) composites are successfully synthesized through an interfacial growth of Mg-MOF-74 onto the surfaces of the synthesized CP for adsorption and separation of CO 2 , CH 4 , and N 2 . The structural characteristics of the resultant composites are systematically characterized by various characterizations. In particular, small-angle X-ray scattering (SAXS) patterns are used to elucidate the fractal structural evolutions of the parent CP, Mg-MOF-74, and Mg-MOF-74@CP. Meanwhile, the single-component adsorption isotherms for CO 2 , CH 4 , and N 2 are demonstrated. The breakthrough measurements on CO 2 /CH 4 and cycling tests on CO 2 are conducted. The results elucidate that the CO 2 equilibrium capacity of Mg-MOF-74@CP is higher than that of parent CP, displaying a high affinity toward CO 2 , the longer breakthrough time and enhancement of CO 2 uptake exhibit a better separation performance. The cycling tests on CO 2 reveal that the Mg-MOF-74@CP could be used repetitively, promoting its practical application in an energy-saving and economical way. Additionally, the adsorption isotherms and adsorption sites of the prepared Mg-MOF-74@CP are simulated using the Grand Canonical Monte Carlo (GCMC) method, elucidating the mechanism of the gas separation performance of Mg-MOF-74@CP.
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JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
·
2015
·Vol. 48
·期 4
·268-275
·
IF 0.644
Da-Niu Cai,Kuan Huang,Xiao-Min Zhang,Xing-Bang Hu,You-Ting Wu
Amino acids were used to modify macroreticular ion exchange resin for the adsorptive capture of CO2. Adsorption isotherms, adsorption rate curves, heats of adsorption, and gas separation performance were determined. It is found that the adsorption capacity of the resin increases significantly after the loading of amino acids. The adsorption progresses rapidly and reaches equilibrium within 3 min. The adsorption capacity decreases with the increasing temperature, and room temperature is a suitable condition that enables high adsorption of CO2. The adsorbent can be promoted by water vapor in removing CO2 effectively from gas mixtures. Ten continuous adsorption–desorption cycles was performed, showing that the adsorbent is of good regeneration performance and the adsorption capacity keeps at about 0.9 mmol/g after regeneration.
研究领域:
化学工程
·
环境科学
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NANO
·
2019
·
IF 1.293
Hongning Wang,Chao Xu,Yongsheng Zhou,Wenpu Zhao,Jing Zhong,Weiqiu Huang,Ruoyu Chen
Hierarchical N-doped carbon nanotubes (NCTs) with controllable aspect ratios were developed for CO 2 adsorption. In this work, NCTs were synthesized by coating different amounts of 3-aminophenol/formaldehyde resin (APF) on the outer layer of silica nanotubes, carbonizing in N 2 at 700 ∘ C and removing the silica and Ni template by hydrofluoric acid etching. The obtained NCTs were activated by K 2 CO 3 . After activation, micropores on the activated N-doped carbon nanotubes (ANCTs) were enriched, the micro-surface area and pore volume of ANCT-1.0 reached 1195 m 2 g − 1 and 0.45 cm 3 g − 1 , respectively, and the corresponding adsorption capacity increased by 50% (4.50 mmol g − 1 at 0 ∘ C and 1 bar). Moreover, ANCT-1.0 maintained a high stability throughout consecutive adsorption–desorption cycles. The advantages of hierarchical N-doped carbon nanotubes, including their meso–microporous structures, high geometric aspect ratio and good stability, make them valuable and promising materials to capture carbon dioxide.
研究领域:
材料科学
·
环境科学
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 24
·18735-18744
·
IF 2.019
Zhang Wei,Wu Weihong,Qu Hongqiang,Xu Jianzhong,Ye Leilei,Li Baoming
In this paper, a facile method was introduced to prepare the hierarchical composite that the aligned Co 2+ doped PANI nanowires and twining Co 2+ doped PANI nanofibers were delicately synthesized on the graphite fiber (Co 2+ doped PANI/gf). The structure of Co 2+ doped PANI was confirmed by Fourier transform infrared spectroscopy and X-ray photoelectron survey. The scanning electron microscopy showed that the surface morphology of Co 2+ doped PANI/gf could be controlled by adjusting the molar ratio of An/Co 2+ and the aniline concentration. The Co 2+ doped PANI/gf hierarchical composite exhibited a high specific capacitance of 562 F/g at 0.2 A/g and presented excellent cycling durability that it retained 92.9% of the initial specific capacitance after 1000 cycles at a scan rate of 100 mV/s. The improved electrochemical performance suggested a promising application of the Co 2+ doped PANI/gf hierarchical composite in high performance supercapacitor.
研究领域:
材料科学
·
电化学
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高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Haiyang Zhang,Ruili Guo,Jinli Zhang,Xueqin Li
Mixed matrix membranes (MMMs) have exhibited advantages in overcoming the trade-off effect, although it is still intensively demanded in the design of multifunctional fillers to improve CO2 separation performance. At present, MMMs with transport channels present an effective strategy to obtain ultrahigh CO2 permselectivity. In this work, Pebax-based MMMs was fabricated by incorporating nanocapsules (NCs), whose exterior, interior and transverse shell surfaces contained abundant carboxylic acid groups. NCs, similar to vesicles in cells, provide favorable physical and chemical microenvironments to the constructed CO2 transport channels, enhancing the CO2 permselectivity via both a facilitated transport mechanism and a solution-diffusion mechanism. CO2 permselectivity of MMMs doped with 20 wt % NCs surpassed the 2008 Robeson limit; an increase in CO2 permeability was up to 1431 ± 35 Barrer for pure gas, which was a 362% enhancement from the pure membrane, and an increase of the CO2/CH4 and CO2/N2 ideal selectivities to 46 ± 1.4 and 69 ± 2.7, corresponding to 44% and 23% enhancements from the pure membrane, respectively. This study provides an ingenious strategy to enhance the gas permselectivity of MMMs.
研究领域:
材料科学
·
环境工程
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PubMed
高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 3
·e01844
·
IF 4.1
Xiao Lin,Hongsen Dong,Le Xu,Shipeng Ding
Co-based catalysts were reported to be active in CO 2 hydrogenation to CH 4 . Herein, we reported the selectivity of CoO x catalysts could be modulated from CH 4 to CO after modifying by MoO x , which was almost inactive in CO 2 hydrogenation. The strong interaction between CoO x and MoO x species in CoMoO x resulted in decent catalytic performance in CO 2 hydrogenation to CO, with the highest CO 2 conversion of ∼38% and a high CO selectivity of ∼99%. The strong interaction between CoO x and MoO x induced the formation of rich oxygen vacancy, which promoted adsorption of CO 2 on oxygen vacancies neighboring MoO x , while H 2 was activated in CoO x sites. Compared with CoO x and MoO x , bicarbonate species were detected during the in situ CO 2 hydrogenation to CO. This work illustrated the critical role of synergistic effect in tuning the selectivity in CO 2 hydrogenation.
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ENERGY & FUELS
·
2019
·
IF 3.021
Chenxu Li,Yue Zhao,Shufeng Shen
Potassium lysinate (LysK) has shown the advantages of reaction kinetics and absorption performance over conventional monoethanolamine (MEA) for CO2 capture. However, very little information is available about its desorption behaviors. In this work, CO2 solubility in aqueous 17.6, 33.5, and 40.8 mass % LysK was measured in an equilibrium reactor at temperatures of (363–393) K and CO2 partial pressures ranging from (2 to 400) kPa. Thermal degradation in the presence of CO2 and relative regeneration energy consumption for this absorbent were evaluated, and also compared with aqueous 30% MEA. An empirical model was proposed to correlate the solubility data and the calculated which are in good agreement with the experimental values with AARDs within 12%. CO2 desorption can be enhanced by overhead reflux of condensate water as a result of solvent vapor effect, which also results in the increasing evaporation heat. The aqueous LysK system was found to be less competitive than the MEA system in overall energy consumption of regeneration (kJ/mol CO2 released). Degradation of CO2-loaded LysK solutions in sealed reactors at 383 and 423 K for 5 and 15 days was qualitatively analyzed by total alkalinity and NMR spectroscopy. Compared with other absorbents, LysK has shown better resistance to thermal degradation in the presence of CO2.
研究领域:
化学工程
·
环境科学
·
能源技术
·
气体分离
·
吸收材料
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2016
·Vol. 56
·期 5
·573-582
·
IF 1.719
Lingling Hu,Huagang Ni,Xiaolong Chen,Lele Wang,Ying Wei,Tengfei Jiang,Yaohong Lü,Xiaolin Lu,Peng Ye
Hypercrosslinked polymers (ILHCPs) incorporated with imidazolium salts were prepared using 4-vinylbenzyl chloride, divinylbenzene, and imidazole ionic liquid monomers with various alkyl groups and anions by free radical copolymerization and Friedel-Crafts alkylation reaction. The structures of ILHCPs were characterized by using FT-IR, solid state 13 C CP/MAS NMR spectroscopy, TGA, and gas adsorption. ILHCPs exhibit excellent capability of CO 2 adsorption compared with that of nonfunctional hypercrosslinked polymers (HCPs), although both the BET surface area (447–667 m 2 /g) and pore volume (0.24–0.28 cm 3 /g) of ILHCPs are less than HCPs. The synergistic effect from mirco/mesopore structures and imidazolium salts are proved to play a key role in enhancing the CO 2 adsorption capability and selectivity over other gases for ILHCPs. It can be found that the imidazolium salts content in HCPs is more important compared with the pore texture for adsorbing CO 2 . An optimal molar content of imidazolium salts groups is found to be 10.5% with the maximum CO 2 uptake capability of 7.56 wt% and best CO 2 adsorption selectivity (CO 2 /N 2 ) of 47.9/1 (273 K, 1 bar), while those of the HCPs are only 5.93 wt% and 27.9/1. Such results strongly suggest that ILHCPs can be promising applied in selective CO 2 separation. POLYM. ENG. SCI., 56:573–582, 2016. © 2016 Society of Plastics Engineers
研究领域:
高分子化学
·
环境科学
·
材料科学
·
气体分离
·
碳捕集
·
功能材料
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高影响因子
危险品化学品经营许可证（带存储）