CHEMICAL ENGINEERING RESEARCH & DESIGN
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2024
·
IF 3.7
Xiaofei Xu,Xiaolong Li,Zhi Li,Da Zhang
An experimental study of single carbon dioxide (CO 2 ) bubbles ascending in aqueous solutions of carboxymethyl cellulose (CMC) is performed as a means to obtain further understanding of the rising behavior and mass transfer of soluble bubbles in shear-thinning non-Newtonian fluids. High-speed photography and digital image processing technique are employed to quantify the characteristic parameters of the bubble rising process. The rising behavior of single CO 2 bubbles in a Newtonian fluid (tap water) is measured as a reference. It has been found that the rheology of the liquid phase significantly influenced the rising behavior of the bubbles. In CMC aqueous solutions, CO 2 bubbles mostly followed a straight rising path characterized by increasing aspect ratio and decreasing vertical velocity. Increase in initial bubble size led to bubble deformation in less concentrated CMC aqueous solutions which resulted in an irregular rising path. The evolution of bubble equivalent diameter can be mainly divided into two stages: a fast reduction stage followed by a slow one. Meanwhile, the variation of liquid-side mass transfer coefficient k L of CO 2 bubbles in tap water and CMC aqueous solution with different weight percentages is discussed. The mobility of gas-liquid interface is considered to have significant impact on gas-liquid mass transfer. A dimensionless correlation considering the rheology of the liquid phase is proposed to describe the evolution of the motion and deformation of single soluble CO 2 bubbles in infinite stagnant shear-thinning non-Newtonian liquids.
研究领域:
流体力学
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化学工程
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多相流
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传质过程
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非牛顿流体动力学
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气泡动力学
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环境工程
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DOI
高影响因子
Energy & Environmental Materials
·
2022
·Vol. 6
·期 5
·e12415
·
IF 13.443
Lin Chen,Jingwen Zhou,Junxiang Zhang,Guicai Qi,Bin Wang,Jianli Cheng
High energy density Li-CO 2 batteries have attracted much attention owing to the “two birds with one stone” feature in fixing greenhouse gas CO 2 and providing renewable energy. However, poor reversibility of the discharge product Li 2 CO 3 is one of the main problems that limit its application, resulting in poor cycling stability and severe polarization. Herein, copper indium sulfide (CIS), a semiconducting non-precious metal sulfide, is fabricated as cathode catalysts for high-performance Li-CO 2 batteries. Combined with the synergistic effect of bimetallic valence bonding and coordinated electron transfer, Li-CO 2 batteries using CIS cathodes exhibit high full specific discharge capacity, excellent rate capability and cycle stability, namely it delivers a high specific full discharge capacity of 8878 μAh cm −2 , runs steadily from 10 to 100 μA cm −2 , and performs a stable long-term cycling behavior (>1050 h) under a high energy efficiency of 84% and a low charge voltage of approximately 3.4 V at 20 μA cm −2 within 100 μAh cm −2 . In addition, a flexible Li-CO 2 pouch cell is constructed to reveal the potential of employing CIS to fabricate flexible high energy storage devices in practical applications. This work shows a promising development pathway toward next-generation sustainable energy storage devices.
研究领域:
电化学
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能源材料
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纳米催化
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可持续能源存储
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金属-气体电池
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2013
·Vol. 38
·期 13
·5251-5258
·
IF 3.548
Qiang Zhao,Zhuobin Yu,Wen Yuan,Jinping Li
Under mild conditions (near-neutral aqueous solutions, room temperature , and atmospheric pressure), an attractive electrolyte was expanded for splitting water and three novel oxygen-evolution catalysts (Co-C i , Ni-C i , Ag-C i ) were generated. The Co-C i catalyst showed a high oxygen-evolution rate (24.42 μmol h −1 ), a low oxygen-evolution overpotential (395 mV) and excellent stability. In addition, the non-amorphous Ag-C i catalyst, different from reported catalyst, was generated. The catalyst has been further characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), and X-ray photoelectron spectroscopy (XPS).
研究领域:
材料化学
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电化学
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催化化学
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能源科学
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纳米材料
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2014
·
IF 2.045
Chao Guo,Shaoyun Chen,Yongchun Zhang,Guangbo Wang
A mixture of 2-(2-aminoethylamine)ethanol (AEEA) with benzyl alcohol (BP) as absorbent was developed to reduce energy consumption in an amine-based CO2 capture process. The solubility of CO2 in the AEEA + BP solution was compared with AEEA + diethylene glycol (DEG), AEEA + triethylene glycol (TEG), and AEEA + H2O. The CO2 loading (mol CO2/kg amine) at the same CO2 partial pressure was in the order AEEA + H2O > AEEA + BP > AEEA + TEG > AEEA + DEG, and CO2 loading of all these solutions increased with increasing vapor pressure of CO2. Besides, the CO2 loading in AEEA + BP solution significantly decreased with increasing reaction temperature. The desorption rate of AEEA + BP solution was about 1.3 times faster than that of aqueous AEEA solution at the same desorption temperature, and AEEA + BP solution needed 30% time less than AEEA + H2O solution to reach reaction end point. The AEEA + BP solution showed stable repeatability in four cycles of absorption–desorption tests.
研究领域:
化学工程
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碳捕集与封存
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温室气体减排
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分离过程
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Chem Catalysis
·
2025
·
IF 11.6
Xiaoxiong Huang,Linping Qian,Yujin Ji,Wenzhe Niu,Yuncheng Hu,Liangyao Xue,Jingjing Li,Shuanglong Huang,Jiaqi Zhang,Youyong Li,Bo Zhang
The electrocatalytic carbon dioxide reduction reaction (CO 2 RR) in pure water is one of the most promising strategies for avoiding crystallization in conventional electrolytes. Here, we sought to modify the catalyst of dispersed single-atom nickel (Ni) sites on an ultrathin nitrogen-doped carbon nanosheet (Ni–N–C) by using amino groups (Ni–N–C–NH 2 ). The obtained Ni–N–C–NH 2 catalysts exhibited a peak turnover frequency of 11.1 s −1 with >90% CO selectivity and ultrastable durability of 100 h of continuous operation and achieved two to three times greater current density than Ni–N–C. Operando spectroscopic evidence combined with theory studies suggested that the improved CO selectivity originates from the synergistic effect of the amino groups and Ni–N–C. The introduced amino groups with the surface property of the electron donor upshift the d -band center of Ni and favor CO 2 capture and proton-coupled electron transfer, ultimately enabling highly efficient operation of the CO 2 RR on Ni–N–C catalysts.
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高影响因子
Frontiers of Environmental Science & Engineering
·
2025
·Vol. 19
·期 8
·1-14
·
IF 6.4
Yang Zhouzhou,Zheng Xudong,Ji Biao,Xu Zihuai,Bao Sifan,Sun Wei,Mei Jinfeng,Rong Jian,Li Zhongyu
Utilization of carbon-based materials is crucial for mitigating CO 2 emissions. However, practical materials for CO 2 capture remain challenging due to limitations in adsorption capacity and rate. Inspired by the unique structural features of biomass materials, high-performance hierarchical porous carbon was prepared using vascular plants. The ordered arrangement structure effectively improved the adsorption capacity and rate of the material by optimizing the pore structure. Potassium hydroxide (KOH) was used as an activator to synthesize microporous carbon with an ordered hierarchical structure. The properties of hierarchical porous carbon were characterized. The experimental results indicate that porous carbon prepared from loofah complex has excellent CO 2 adsorption capacity. The highest adsorption capacity is 4.09 mmol/g when the activation temperature is 700 °C. The selectivity (15/85) for the binary gas mixture CO 2 /N 2 was 20, and the recoverability was good after 10 cycles. The hierarchical porous carbon derived from loofah showed excellent adsorption performance and has potential in various applications.
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Scientific Reports
·
2026
·
IF 3.9
Yan Yuanzi,Tao Yan,Zhou Shaoli,Fan Yunfeng,Zhang Peng
To address the limitations of conventional CO₂-responsive plugging materials (fixed network structure, slow response, and poor long-term stability) in fractured reservoirs, a novel terpolymer hydrogel poly(acrylamide-co-2-acrylamido-2-methylpropane sulfonic-co-acid-methylenebis(acrylamide)) hydrogel, denoted as P(AM-AMPS-MDA) was designed via solution copolymerization. The hydrogel features a hybrid network of covalent crosslinks (from MDA with tunable ethyleneamino chain length n = 1–3) and CO₂-induced ionic clusters, with precise reactant ratios (AM: AMPS: MDA = 90:16:4, K₂S₂O₈:Na₂SO₃=2:1) ensuring reproducibility. Comprehensive characterizations (FTIR, TGA/DSC, rheology, strain sweep) confirmed its superior performance: the optimized MDA₂ hydrogel ( n = 2) exhibits rapid CO₂ response (< 10 min), balanced swelling ratio (~ 18), high storage modulus (1790 Pa), and excellent thixotropy (> 90% recovery in 30 s). It maintains structural integrity at 80 °C ( T d ≈ 617 °C) and retains > 85% mass over 10-year reservoir simulation. Core flooding tests and visual demonstrations validate its effective plugging (residual resistance coefficient > 20) and injectability. This design resolves key trade-offs in existing systems, providing a promising candidate for conformance control in CO₂-enhanced oil recovery and sequestration.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 4.3
Ling Chen,Xiangyu Ma,Tingting Wang,Qingliang Li,Ruru Qian,Mengting Cui,Haizhu Yu,Manzhou Zhu
The atomic precision of metal nanoclusters reveals their size-dependent physicochemical properties and highlights the challenges in achieving controllable synthesis at the single-atom level. Herein, we report a series of silver clusters adopting an atom-by-atom evolution pattern, including Ag 13 (SR 1 ) 12 (DPPP) 3 , Ag 14 (SR 1 ) 12 (DPPF) 3 , and Ag 15 (SR 1 ) 12 (DPPB) 3 (Ag 13 -Ag 15 , HSR 1 and DPPP/DPPF/DPPB denote 3,5-bis(trifluoromethyl)thiophenol, and 1,3-bis(diphenylphosphino)propane/ferrocene/butane). Each of these three clusters comprises a shell structure with three groups of Ag 2 (SR 1 ) 4 (DPPX) (X=P/F/B) blocks, while the metallic core corresponds to singly, linearly, and triangularly capped distorted octahedral Ag 6 structures. So far, Ag 13 represents the first 1e metal cluster. The kinetic monitoring and the molecular dynamic (MD) simulations demonstrate the nucleation driven by ligand flexibility. The structural peculiarities of the nanoclusters (which are loaded on activated carbon) govern their divergent catalytic behaviors in epoxide carboxylation reactions. The DPPF stabilized Ag 14 cluster exhibits high activity (98 % yield in 20 h at 75°C, and well maintained after 5 cycles), outperforming Ag 13 (56 %) and Ag 15 (65 %) under otherwise identical conditions. The DFT results show that CO 2 could be significantly stabilized by parallel benzene rings around AgS 2 in Ag 14 , forming π-CO 2 -π structures. This study establishes a dual structure–activity relationship: ligand flexibility regulates the nucleation process during synthesis, whereas the resultant surface defects induced by rigid ligands determine catalytic performance.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.3
Xuejian Liu,Zhenyuan Yin,Jiayu Sun,Xinrui Cai,Yan Li,Guangjin Chen,Chenlu Xu,Hongfeng Lu,Praveen Linga
Achieving global net-zero emissions necessitates advancements in sustainable CO2 sequestration technologies. CO2 sequestration in subsea sediments in the form of clathrates presents a promising option due to inherent reaction conditions, high CO2 storage capacity, and superior stability. However, the sluggish CO2 hydrate formation kinetics significantly constrains its field-scale application, particularly in the process of CO2 hydrate cap formation to prevent the CO2 leakage. Herein, we propose a biomolecular strategy by using the low-dose hydrophobic amino acid l-methionine to address this challenge. Combining morphological imaging and in situ Raman spectroscopy, l-methionine was found to disrupt the rigid CO2 hydrate films and induces self-organized liquid CO2 transport channels, significantly reducing CO2 mass transfer resistance. Molecular-level analysis further reveals that the hydrophobic group of l-methionine leads to a 70% decrease in the energy barrier of the CO2 diffusion. This biocompatible promoter enables ultrahigh CO2 uptake (120.6 v/v) with a 15-fold enhancement over pure water. Rapid CO2 hydrate formation for hydrate-sediment cementation was further validated using the acquired South China Sea clayey-silty marine sediments. This environmentally benign strategy demonstrates extraordinary CO2 hydrate formation kinetics from liquid CO2 compared to the state-of-the-art promoters, offering a promising and practical solution for long-term offshore CO2 storage to mitigate climate change.
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CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.7
Guoqiang Hou,Di Xu,Haifeng Fan,Yangyang Li,Siyi Huang,Mingyue Ding
Direct synthesis of dimethyl carbonate (DMC) from CO 2 is critical for achieving carbon neutrality, yet the sluggish formation and conversion of the key *CH₃OCOO intermediate-due to the difficulty of C-O coupling-limit high DMC yields. Herein, we developed a boric acid-assisted recrystallization strategy to fabricate grain-boundary-rich CeO 2 hollow nanospheres, which serve as an efficient catalyst for CO 2 to DMC synthesis. The introduction of grain-boundary (GBs) induced the electron redistribution, which led a decrease in the electron density of bulk Ce ions and created a localized electron-rich region at homogeneous interface. This unique electronic landscape promoted reactive methoxy formation and stronger CO 2 adsorption, thereby enabling more efficient coupling of *CH 3 O and *CO 2 to form the *CH 3 OCOO. Concurrently, the enhanced CO 2 adsorption facilitated the dissociation of *CH 3 OCOO and subsequent DMC formation. As a result, the 4%BCeO 2 -GBs achieved an advantageous DMC yield of 19.8 mmol/g. In the assistance of dehydrating agent, the catalyst delivered a remarkable 264.2 mmol/g DMC yield and 7.12% methanol conversion, which was 32 times higher than commercial CeO 2 . This study elucidated the intrinsic mechanisms governing *CH 3 OCOO intermediate behavior and offers valuable guidance for CO 2 converting into high-value organic chemicals.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Xin Li,Ze Lv,Tong Wu,Bolin Ji,Wei Wu,Yi Zhong,Hong Xu,Zhiping Mao,Linping Zhang
Enhancing the photocatalytic CO 2 conversion efficiency of metal-organic frameworks (MOFs) remain a central challenge in advancing carbon capture and utilization (CCU) technologies. Herein, we report a mixed-ligand strategy to construct a hybrid MOF (denoted as CTN ⊂ NM) by incorporating a Co-metalated tetrakis(4-carboxyphenyl)porphyrin (CoTCPPNa 4 , CTN) into an amine-functionalized MIL-101(Fe) framework (NH 2 -MIL-101(Fe), abbreviated as NM; MIL = Materials of Institute Lavoisier, a prototypical series of robust MOFs). The optimized catalyst with a Co/Fe molar ratio of 0.40 achieves a HCOOH production rate of 119.11 μmol g −1 h −1 under visible light in the absence of a sacrificial agent, representing a 4.2-fold increase compared with pristine NM. When a sacrificial electron donor is introduced, the rate further rises to 179.87 μmol g −1 h −1 . The markedly enhanced activity originates from the synergistic integration of CTN and NM: CTN provides strong visible-light absorption and efficient catalytic sites, while NM offers high porosity and strong CO 2 affinity. This cooperation broadens the light-absorption range, suppresses charge-carrier recombination, and accelerates CO 2 -reduction kinetics. In addition, the Co 3+ center in the metalloporphyrin macrocycle functions as an active CO 2 adsorption site, facilitating its activation and selective conversion to HCOOH. Overall, this study presents an effective mixed-ligand hybridization approach for solar-to-chemical energy conversion and provides valuable insights for the rational design of MOF-based photocatalysts toward carbon-neutral fuel production.
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DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2026
·
IF 7.2
Shaohong Guo,Ruyue Zheng,Huimin Yu,Jiaqi Yan,Jiayu Li,Haobo Wen,Ziyun Zhou,Jingchun Jia,Ying Chang,Meilin Jia,Changyan Zhu,Heng Jia,Jiang Wang,Zhongmin Su
Photocatalytic CO 2 reduction into value-added chemicals such as CO is of great importance for carbon-neutral in the future. However, both high CO 2 activation barriers and sluggish charge kinetics make it still a challenge for CO 2 photoreduction with high reactivity. Herein, a type-II heterojunction (CZ/C), which consists of CdS (C) nanospheres anchored on the defective Ce-doped ZnIn 2 S 4 (CZ) microflowers, was synthesized by an in-situ solvothermal route, realizing exceptional CO 2 catalytic performance under simulated sunlight irradiation. According to the detailed characterizations and density functional theory calculations, the energy barrier of the rate determining step is significantly reduced due to the outstanding CO 2 adsorption and activation on rare earth Ce atoms. Simultaneously, the separation and transfer efficiency of photogenerated carriers are greatly facilitated by type-II heterojunction constructed by anchoring CdS on CZ and S vacancies resulting from a heteroatom doping strategy. Thus, the optimum photocatalyst of CZ2/C2 composite provides an advantageous platform for CO 2 photoreduction to CO, which is roughly 7.5- and 3.0-fold higher than those of the pristine ZIS and CZ2, respectively. This work offers a promising avenue for designing effective catalysts with a dual-strategy method for photocatalysis.
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