APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Zhiwen Li,Jiari He,Zaiqi Li,Jia Song,Difei Xiao,Haixia Liu,Yuanyuan Liu,Peng Wang,Zhaoke Zheng,Hefeng Cheng,Ying Dai,Baibiao Huang,Zeyan Wang
Pulsed electrocatalytic CO 2 reduction reaction (p-CO 2 RR) on copper-based catalysts can dynamically stabilize active Cu + sites and enrich surface *OH, enabling sustained CO 2 -to-C 2+ conversion. However, its practical application is still constrained by: 1) low time efficiency caused by both the inherent instability of Cu + during cathodic polarization and the sluggish re-oxidation of Cu 0 to Cu + , and 2) inadequate CO 2 -to-C 2+ conversion efficiency caused by the insufficient *OH coverage. To address these challenges, a Pd-modified Cu 2 O catalyst (Pd-Cu 2 O) with strong Pd-Cu electron interaction is designed. In situ experiments and theoretical studies reveal that Pd induces stable electron-deficient Cu + /Cu 0 sites, which effectively suppressing Cu + reduction during the cathodic phase and promoting Cu + regeneration during anodic phase, thus shortening the required oxidation duration. Concurrently, Pd accelerates water dissociation and enhances *OH coverage, which facilitates *CO adsorption and enhances C-C coupling. As a result, Pd-Cu 2 O achieves a Faradaic efficiency for C 2+ of 79.8 % with stable operation for over 50 h, and the time efficiency exceeding 87 %, outperforming most reported p-CO 2 RR catalysts. This work highlights the importance of rational catalyst design via electronic structure regulation for enhancing the time efficiency and C 2+ production performance for p-CO 2 RR, paving the way for efficient CO 2 -to-C 2+ conversion and practical applications.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 13.2
Yutong Wang,Zili Fan,Menghan Yuan,Chenlin Zhang,Zihan Hu,Xinlin Cao,Xinming Zhou,Hui Fu
Biphasic absorbents are regarded as highly promising absorbents for carbon dioxide (CO 2 ) capture, owing to their potential energy savings and facile separation. This study introduces a novel piperazine (PZ)/2-(diethylamino)-ethanol (DEEA)/n-propanol (NPA) biphasic absorbent, in which the addition of NPA to the PZ/DEEA binary system results in a doubling of absorption rate, a reduction of the lower phase volume by over 50% to just 28.77% of the total volume, and a CO 2 enrichment level of up to 95.59%, achieving rich phase concentration. Furthermore, the PZ/DEEA/NPA absorbent exhibited excellent absorption-desorption stability and a high desorption efficiency (~ 90%), with a regeneration heat approximately 31% lower than that of benchmark monoethanolamine (MEA). NMR and molecular simulation analyses indicate that NPA's weak competitive solvation effect reduces dispersive interactions with CO 2 absorption products, thereby indirectly strengthening hydrogen bonding of products. This facilitates dense aggregation, resulting in a volumetrically contracted, high-concentration solid product during the final absorption stages. Additionally, corrosion assessments indicate that both fresh and CO 2 -saturated absorbents demonstrate extremely low corrosion rates, favoring industrial implementation. In conclusion, the PZ/DEEA/NPA biphasic absorbent proves to be a potential alternative to the conventional MEA for sustainable CO 2 capture.
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ENERGY & FUELS
·
2023
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IF 5.3
Yanlin Liu,Jiren Tang,Yunzhong Jia,Yiyu Lu,Chenqing Shang,Rongrong Tian,Xiao Sun,Qi Cheng,Guilin Zhao
The surface wettability and morphology of shale may both be modified by SiO2 nanofluid (SNF), directly influencing the capillary force and CO2 geo-storage. However, the literature requires more information and studies with respect to nanoparticles’ effect on shale surface at reservoir conditions of high pressure and temperature. Here, we investigate the stability of nanoparticle layers formed by SNF on Longmaxi (marine) and Yanchang (continental) shale in ScCO2 and nanoparticles’ efficiency of wettability reversal at different nanofluid aging times and concentrations. Besides, low-pressure nitrogen gas adsorption (LP-NA) was performed to evaluate the effect of nanoparticles on shale pore structures after ScCO2 exposure. Results indicate that the nanoparticle structure could be stable in ScCO2 and render the wettability of shale samples to be more hydrophilic, while the quartz-rich Longmaxi shale surface shows a denser nanostructure than the clay-rich Yanchang shale surface does and presents a stronger water wettability. More micropores are transformed into mesopores or macropores for ScCO2- and SNF-treated Longmaxi samples than solely ScCO2 samples, but the pore structure parameters show trivial alteration in Yanchang samples after SNF treatment. The difference in the capillary force recovery between Longmaxi (recovered by 660.5%) and Yanchang (recovered by 500.6%) shale implies that silica nanofluid may be more suitable for Longmaxi formation in the CGS application.
研究领域:
石油工程
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碳捕集与封存（CCS）
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能源纳米技术
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储层地质学
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界面科学
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ACS Applied Polymer Materials
·
2026
·
IF 5.2
Ziyi Yuan,Zhihong Lin,Kejing Li,Jian Li,Viatcheslav Freger,Xuezhong He
Polymers of intrinsic microporosity (PIMs) are promising membrane materials for CO2 separation due to their high permeability; however, their limited CO2/N2 selectivity restricts practical application. Herein, mixed-matrix membranes (MMMs) were fabricated by incorporating a CO2-molecularly imprinted UiO-66-NH2 filler (MIP@U) into amidoxime-functionalized PIM-1 (AOPIM-1), followed by thermal treatment at 160 or 250 °C under vacuum to regulate the membrane microstructure. Spectroscopic and porosity analyses (FTIR, XRD, and N2 physisorption) show that thermal treatment at 160 °C promoted oxadiazole-ring formation, leading to enhanced subnanometer microporosity and improved CO2/N2 selectivity. In contrast, treatment at 250 °C partially regenerates nitrile groups and generates larger micropores, resulting in higher CO2 permeability but reduced selectivity. The MIP@U filler introduces CO2-recognition cavities and improves interfacial compatibility, enabling synergistic control of polymer microporosity and interfacial transport pathways. The optimized 3 wt % MIP@U/AOPIM-1-TR160 membrane achieves a CO2 permeability of ∼1600 Barrer and a CO2/N2 selectivity of 50.8. The membrane also demonstrates stable performance under pressures up to 12 bar and during 30 h of continuous operation at 2 bar. This study highlights a dual-approach strategy combining thermally tailored PIM chemistry with molecularly imprinted MOF fillers for designing high-performance MMMs for CO2 capture.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Cheng Gu,Yakun Qu,Ya Chen,Yunlong Wang,Chaowen Liu,Le Zhang,Xiangyang Cui,Xiaoguang Zhao,Enhui Xing,Yibin Luo,Zhen Chen,Junhua Li
Framework Fe-ZSM−5 was developed for catalytic CO 2 desorption from MEA. • Isolated tetrahedral Fe 3+ sites were incorporated into the MFI framework. • Framework Fe reduced Fe dissolution in MEA by more than 88% over 120 °C for 15 days. • Fe-ZSM−5 increased the average CO 2 desorption rate by 35% over the blank case under continuous operation. • Lewis acid-base pairs promote H 2 O-assisted carbamate decomposition. Catalytic CO 2 desorption from aqueous amine solvent is a promising strategy for energy-saving CO 2 capture from industrial flue gas. As an important candidate, conventional zeolite catalysts often suffer from insufficient activity, while metal incorporation can effectively regulate acidity but also causes metal-site dissolution. Herein, we prepared an excellent ZSM-5 zeolite with framework-incorporated Fe (Fe-ZSM−5) through feasible hydrothermal method. The coordination characterizations confirm that Fe-ZSM−5 contains isolated, tetrahedrally coordinated Fe 3 + within the MFI framework. Compared to impregnated Fe, the dissolution rate of framework Fe species in ethanolamine absorbent was reduced by more than 88%, which can effectively enhance catalytic performance and simultaneously avoid solvent degradation. Meanwhile, the incorporation of framework Fe modifies the acidic environment of the zeolite by generating Si-OH-Fe Brønsted acid sites and Fe-related Lewis acid sites. Fe-ZSM−5 exhibited high catalytic activity for CO 2 -rich MEA solution, with a peak desorption rate of 4.306 mmol·min −1 (48% higher than the blank case); the catalytic rate constants reach 2.0–2.4 × 10 −4 min −1 . This work proposes a novel design strategy for high-performance acid catalysts, representing a durable and efficient catalyst for reducing regeneration energy in amine-based CO 2 capture. Download: Download high-res image (299KB) Download: Download full-size image
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INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 35
·20723-20730
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IF 4.6
Cong Shenzhen,Sun Si,Wang Ming,Zhang Yijing,Shen Qin,Zhang Yatao,Pang Huan
Membrane-based separation technology holds great promise
for CO 2 capture, yet conventional membranes are often constrained
by the permeability-selectivity trade-off. In this study, we developed
a zirconium-cluster (Zr 6 )-incorporated ZIF-8 membrane via
an electrochemical synthesis strategy to address this limitation.
The resulting Zr 6 @ZIF-8 composite membrane exhibits high
crystallinity, a dense microstructure, and homogeneous dispersion
of Zr 6 clusters within the ZIF-8 framework. The optimized
Zr 6 @ZIF-8–2 membrane demonstrates outstanding CO 2 separation performance with a CO 2 permeance of
up to 300.0 gas permeation unit and CO 2 /N 2 and
CO 2 /CH 4 selectivities of 27.0 and 14.8, respectively.
The Zr 6 clusters enable effective structural regulation
of ZIF-8 membranes, resulting in enhanced CO 2 separation
performance and leading to improved diffusion selectivity. Furthermore,
the membrane shows a stable separation performance under varying feed
pressures and temperatures, along with excellent long-term operational
stability. This work provides an effective electrochemical approach
for fabricating high-performance MOF-based membranes, offering a promising
candidate for industrial CO 2 capture and natural-gas purification.
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PubMed
高影响因子
Journal of Energy Chemistry
·
2025
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IF 14.9
Chenhao Wang,Xiaoyun Miao,Ting Luo,Xingzhi Zhu,Xiaofeng Ye,Zhaoyin Wen
CO 2 hydrogenation using protonic ceramic electrolysis cells (PCECs) to produce fuel gases such as CH 4 and CO has been considered as a promising technology for effective CO 2 utilization. However, the long-term stability of conventional PCECs based on Y and Yb doped BaZrO 3 -BaCeO 3 (BCZYYb) proton conductors is severely limited by their susceptibility to carbonate formation under high concentration CO 2 . In this work, a new type PCEC based on CO 2 -tolerant La 5.6 WO 11.4−δ (LWO) material is firstly constructed. A three-layer porous-dense-porous LWO ceramic scaffold is fabricated via a pressing, dip-coating and co-sintering process, followed by Ni and La 0.6 Sr 0.4 CoO 3−δ (LSC) catalyst impregnation to ensure the chemical compatibility among materials and form an efficient PCEC-based CO 2 hydrogenation reactor. Benefits from the synergistic catalysis of nano nickel and LWO, the reactor gets a CH 4 selectivity of over 50 % at 600 °C under 20 % CO 2 concentration, and it operates stably for over 320 h at 600–650 °C under high CO 2 concentrations of 50–80 %, showing no degradation in CO 2 conversion rate or CH 4 selectivity. Post-mortem analysis demonstrates that the CO 2 absorption characteristics of LWO and the morphological uniformity of nano nickel lead to stable CO 2 methanation. This study provides a viable strategy for designing highly stable PCEC-based CO 2 hydrogenation reactors.
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MOLECULES
·
2026
·Vol. 31
·期 3
·514
·
IF 5.1
Xiangjuan Meng,Mingwei Zhao,Zhenfeng Ma,Xinjie Xu,Zhongzheng Xu,Yuxin Xie,Yining Wu,Ziyi Wang,Wenhao Ren,Huan Zhang
CO2flooding is an effective technique for enhancing oil recovery in low-permeability reservoirs. However, it is often hindered by severe CO2channeling. This challenge is particularly pronounced in near-wellbore regions with large pressure differentials and in fractured reservoirs, where high CO2injection rates and rapid breakthrough require channel blocking systems with high mechanical strength and excellent CO2-resistant performance. In this work, a smart responsive polymer was synthesized and subsequently crosslinked with a highly active phenolic resin crosslinking agent to develop a smart responsive polymer gel channel blocking system. The resulting gel exhibits CO2-responsive strength enhancement and excellent CO2-resistant performance. The static and dynamic gelation behaviors, nonlinear rheological properties, CO2-resistant performance, channel blocking, and enhanced oil recovery performance of the smart responsive polymer gel were systematically investigated. The results demonstrate that the polymer gel maintains good structural stability during dynamic transport in the reservoir and does not undergo significant strength degradation under shear conditions. Moreover, the smart responsive polymer gel exhibits excellent CO2-resistant performance within a temperature range of 80–110 °C, salinity up to 10 × 104mg/L, and pressure up to 20 MPa. Moreover, the system shows a significant enhancement in channel blocking and enhanced oil recovery performance, highlighting its promising potential for effective CO2flooding channel blocking in low-permeability reservoirs.
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ENERGY
·
2022
·
IF 8.857
Heping Xie,Hailong Liao,Shuo Zhai,Tao Liu,Yifan Wu,Fuhuan Wang,Junbiao Li,Yuan Zhang,Bin Chen
Using aqueous Zn–CO 2 batteries to store renewable energy and produce valuable chemicals using CO 2 as the source is a promising method for CO 2 mitigation, that is alternative to traditional energy-costing CO 2 capture/storage technologies. However, the lack of efficient CO 2 -reduction catalysts significantly hinders the efficiency of such batteries. In this study, an efficient perovskite cathode, Pd-doped La 2 CuO 4 , was successfully developed for the cathodic CO 2 reduction reaction (CO 2 RR), and the optimal doping ratio of La 2 Cu 1-x Pd x O 4 ( x = 0.05) was determined. Compared with the pristine La 2 CuO 4 catalyst, the current density for the CO 2 RR in the H-cell and the Faraday efficiency of CO production are both increased by ∼50% when operated −1.0 V (vs RHE). As a result, the peak power density of a Zn–CO 2 battery using the Pd-doped La 2 CuO 4 catalyst reached 0.75 mW cm −2 at 2.23 mA cm −2 by an enhancement ratio of 25%. Density functional theory calculations revealed that the *CO desorption processes on the cathode were enhanced owing to Pd doping, which accounted for the enhanced CO 2 RR activity and selectivity. The findings of this study show the potential application of perovskite catalysts in the cathode of Zn–CO 2 batteries and provide an effective method for battery performance enhancement via the facile Pd doping.
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CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Xuejian Liu,Junjie Ren,Daoyi Chen,Zhenyuan Yin
The continuously increasing CO 2 emissions since industrialization has sparked widespread concerns on environmental and climate change issues. Carbon sequestration and storage technologies (e.g., hydrate-based CO 2 sequestration) present promising potential for the disposing of excessive CO 2 in geological media. High gas uptake capacity and rapid CO 2 hydrate formation kinetics are required for the application of such a technology. In this study, we compared the kinetic promotion effects of sodium dodecyl sulfate (SDS) and L -methionine ( L -Met) on CO 2 hydrate with the objective of identification of an effective and eco-friendly CO 2 hydrate kinetic promoter. The experimental results suggested that L -Met (0.1 wt%) promotes CO 2 hydrates formation significantly with a gas uptake in CO 2 hydrate five times more than SDS at the same concentration. The hydrate morphology observations indicated that the wall-climbing hydrates associated with the addition of L -Met induced by the capillary driving force offer a possible explanation for the difference in the observed kinetics. A novel calculation method was developed to quantify the partition of CO 2 in gas, liquid and hydrate phases. Increasing the initial gas–liquid ratio promotes CO 2 stored in the hydrate phase as solid rather than in the liquid phase as dissolution. We further demonstrated the reusability of L -Met in five consecutive cycles of CO 2 hydrate formation and dissociation. It was assessed that L -Met as a CO 2 hydrate kinetic promoter is superior to SDS and can be employed as an efficient, reliable and eco-friendly kinetic promoter for the hydrate-based CO 2 sequestration technology.
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CELLULOSE
·
2022
·Vol. 29
·期 12
·6745-6758
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IF 6.123
Zhang Jinyang,Mi Shu,Liu Fei,Qiao Qian,Na Haining,Zhu Jin
Organic solvents with low Henry's constants, such as propylene carbonate (PC) and sulfolane, were proposed to be used as CO 2 absorbents to increase CO 2 absorption capacity in the CO 2 switchable solvent, so that the dissolution of cellulose can be effectively enhanced. With the addition of PC, the maximum concentration achieved for the dissolution of paper cellulose can be largely increased from 1.0 to 5.0 wt%, while those for microcrystalline cellulose and corncob cellulose were increased from 5.0 to 10.0 and 7.0 wt%, respectively. Moreover, the chemical and crystalline structure of the regenerated cellulose was not affected by the addition of CO 2 absorbents. This study illustrated a simple and effective way to modify the CO 2 switchable solvent, which would be helpful for the application of the complex solvent system for the enhanced dissolution, derivatization, and processing of cellulose in the future.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Liwei Sun,Ming Gao,Shaokun Tang
Design and synthesis of porous materials as efficient CO 2 adsorbents have attracted much attention to alleviate the environmental issues derived from CO 2 emission. Here a new amino acid-functionalized poly(ionic liquid) poly[1-(p-vinylbenzyl)-3-methylimidazolium glycinate] [P([VBMI][Gly])] was prepared with [VBMI][Cl] and P([VBMI][Cl]) as intermediate products. Chemical structures of the above materials are confirmed by NMR and FT-IR spectra. P([VBMI][Gly]) presents dense monolith with amorphous structure and high thermal stability. CO 2 adsorption capacity of P([VBMI][Gly]) is 104 mg CO 2 /g PIL. To further improve CO 2 adsorption performance, porous-P([VBMI][Gly]) was constructed via supercritical foaming technology for the first time. The effects of foaming conditions on the morphology and CO 2 adsorption performance of porous-P([VBMI][Gly]) were investigated. And porous-P([VBMI][Gly]) foamed at 110 °C, 30 MPa and 2 h presents uniform cell distribution and obvious porous structure. CO 2 adsorption capacity of porous-P([VBMI][Gly]) can reach up to 165 mg CO 2 /g PIL, which is significantly higher than that of pristine P([VBMI][Gly]). Compared with pristine P([VBMI][Gly]), the pore parameters of porous-P([VBMI][Gly]) are obviously improved, and the porosity and average pore diameter can reach 82.9% and 3 μm respectively. Its CO 2 adsorption capacity decreases by 25% after twelve-cycle adsorption–desorption experiments.
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