AICHE JOURNAL
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2026
·
IF 4.4
Xin Ta,Qiang Sun,Min Xiao,Zhiwu Liang,Hongxia Gao
Phase-separating absorbents show promise for reducing energy consumption, as desorption requires heating only the CO 2 -enriched phase. This study investigates triethylene glycol monobutyl ether (TGBE) as a phase-separation promoter for the N-methylaminoethanol (MAE)–water system. The role of TGBE in restructuring hydrogen-bond networks and promoting rich-phase aggregation was analyzed using gas–liquid–liquid equilibrium, 13 C NMR, gas chromatography, and molecular dynamics (MD) simulations. Experimental results demonstrate that TGBE significantly reduces rich-phase volume while achieving CO 2 equilibrium loadings of 3.59 mol/kg for water-containing systems and 4.73 mol/kg for water-free systems. MD simulations reveal that CO 2 absorption redistributes intermolecular interactions, where strengthened hydrogen bonds between water and ionic species drive polar rich-phase aggregation. Furthermore, an empirical model, a GBDT-based predictive model, and a modified Deshmukh–Mather framework were developed to describe phase behavior with AARDs of 2.81%, 4.58%, and 6.61%, respectively. These findings provide a theoretical foundation for designing energy-efficient CO 2 capture systems.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122807
·
IF 7.5
Xiao Lin,Zhenxing Zhou,Xiuxiu Zhang,Chongqing Wang
Indirect mineralization is a promising technology for carbon capture, utilization, and storage that enables CO 2 sequestration while simultaneously producing high-purity CaCO 3 . There remains a research gap in the regulation of the CaCO 3 product in the CO 2 mineralization process. This work innovatively compared CO 2 mineralization in different systems. Ca leaching from titanium gypsum was conducted using ammonium citrate, and then CO 2 mineralization was performed in Ca-rich solution (CRS) and calcium citrate precipitate (CCP) systems. The effects of key parameters including ammonia dosage, CO 2 flow rate, and temperature were studied, and the mineralization conversion rate and mineralization products were investigated. Ammonia dosage significantly influenced the mineralization conversion rate and the crystal form of CaCO 3 , and the conversion rate was 95% at 50 mL/L ammonia for CCP and 85% at 100 mL/L ammonia for CRS. Notably, increasing ammonia dosage promoted the vaterite formation in the CCP system. Temperature exhibited a pronounced impact on the mineralization conversion rate. As the temperature increased, the time required to attain the maximum conversion rate decreased markedly from 20 min to 5 min for CRS and from 60 min to 10 min for CCP. Temperature also influenced particle size and morphology, with both systems producing larger particles at higher temperatures. As to the growth mechanism of CaCO 3 , the CRS exhibited a gas–liquid interface dominated by homogeneous nucleation, while the CCP system proceeded through a gas–liquid–solid mechanism governed by heterogeneous nucleation. The high-quality CaCO 3 product (93.53% purity and 96.40% whiteness for CRS; 95.32% purity and 97.80% whiteness for CCP) meeting the standards of commercial CaCO 3 indicated promising economic benefits.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yali Wang,Leibing Chen,Jing Mei,Guoying Li,Feng Zhang,Jiaxing Lu,Huan Wang
“Bimetallic-molecular” interface strategy constructs CuxAg1-x-SPyz catalysts for efficient CO 2 -to-methanol. • Cu 0.3 Ag 0.7 -Spy 0.05 achieves 46.8% methanol FE and 117 mA cm −2 partial current in a flow cell. • DFT calculations confirm Cu-Ag optimizes *CO adsorption, while pyridine modification lowers the *CO → *CHO barrier by 0.27 eV. The design of highly selective catalysts for direct methanol production via CO 2 electrolysis remains challenging due to its complex pathways and intense hydrogen evolution competition. This study employed a “bimetallic-molecular” interface synergy strategy to construct Cu x Ag 1-x -SPy z catalysts by in situ anchoring mercaptopyridine on the CuAg bimetallic surface. Experimental results indicate that the Cu 0.3 Ag 0.7 -Spy 0.05 catalyst in an H-cell exhibits a maximum Faradaic efficiency (FE) of 45.3% for methanol at −1.13 V (vs. RHE), while the FE for methanol in a flow cell reached 46.8% with a partial current density of 117 mA cm −2 , outperforming unmodified Cu Ag and existing mainstream catalysts. In situ ATR-FTIR spectroscopy simultaneously captured *COOH, *CO, *CHO, *OCH 2 , and *OCH 3 intermediates. Combined with DFT calculations, it was confirmed that Cu Ag synergistically optimized *CO adsorption energy, while the modified pyridine acted as a proton relay, lowering the *CO → *CHO energy barrier by 0.27 eV to achieve directional regulation of the methanol pathway. This study establishes a scalable molecular interface engineering paradigm for highly selective CO 2 methanolation and expands novel approaches to “metal-ligand” synergistic design in complex multi-electron reactions. Anchored by metal‑sulfur bonds, a mercaptopyridine modified copper‑silver bimetallic composite material Cu 0.3 Ag 0.7 -SPy 0.05 is prepared. The synergistic interaction between silver and copper bimetallic sites enhances the generation and adsorption of *CO, while the pyridine groups accelerate the effective protonation of *CO to methanol. It delivers a Faradaic efficiency of 46.8% with a partial current density of 117 mA cm −2 for methanol. Download: Download high-res image (179KB) Download: Download full-size image
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Yuqing Sui,Jinlong Li,Xue Yang,Dongxuan Guo,Mingna Chu,Guozhe Sui
ZIF-67-derived Co 3 O 4 /MXene Schottky heterojunction is constructed successfully. • MXene concentrates CO 2 molecules and participates in surface redox reactions. • Schottky heterointerface improves photogenerated carrier separation. • Co 3 O 4 /MXene Schottky heterojunction achieves effectively photocatalytic CO 2 reduction to CO. The escalating emission of carbon dioxide necessitates the urgent development of efficient CO 2 conversion technologies. Herein, a novel Co 3 O 4 /MXene Schottky heterojunction photocatalyst was rationally designed and synthesized, where Co 3 O 4 is derived from ZIF-67 and anchored onto MXene nanosheets. The composite demonstrates high activity in photocatalytic CO 2 reduction, achieving a yield rate of 58 μmol g −1 h −1 for CO using triethanolamine (TEOA) as an electron donor, while maintaining excellent stability over multiple cycles. The enhanced performance stems from the Schottky junction between Co 3 O 4 and MXene, which establishes a built-in electric field that drives efficient charge separation and directional carrier flow. Additionally, MXene acts as a cocatalyst that not only concentrates CO 2 molecules near active sites but also participates in surface redox reactions. This work offers an effective strategy for designing high-performance photocatalysts for sustainable solar fuel production. Download: Download high-res image (368KB) Download: Download full-size image A novel ZIF-67-derived Co 3 O 4 /MXene Schottky heterojunction exhibits photocatalytic CO 2 reduction to CO with production rate of 58 μmol g −1 h −1 .
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高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2026
·
IF 9.2
Liju Bai,Xiaotong Jiang,Can Lv,Yaxing Zhang,Wenwei Wu,Zixuan Hao,Jianchao Luo,Yimin Deng,Tejraj M. Aminabhavi,Helei Liu
High thermal stability amine solvents are critical for post-combustion CO 2 capture. For this, two novel ternary blended amine systems, AMP-AEP-MDEA and AMP-HMDA-MDEA were developed to overcome the limitations of traditional monoethanolamine (MEA) due to its poor thermal stability. The results demonstrated that both the chosen ternary systems exhibited superior CO 2 absorption-desorption performance compared to 30 wt% MEA due to synergistic kinetic effects and high molar amine density, emphasizing the importance of environmental management. To rigorously evaluate long-term durability, accelerated thermal degradation tests were conducted at 150 °C for 28 days to demonstrate AMP-AEP-MDEA had the highest thermal stability with a degradation rate of 25.1%, significantly lower than those of AMP-HMDA-MDEA (29.4%) and MEA (39.6%). Mechanistic investigations using 13 C NMR and GC-MS elucidated distinct degradation pathways. AMP undergoes independent intramolecular cyclization to form oxazolidinones, while stability of the activators dictates the overall system robustness. Rigid heterocyclic nature of AEP that restricts deep fragmentation, limiting the degradation of the side-chain cleavage. In contrast, flexible linear HMDA chains are susceptible to C-C bond breakage and dehydrogenation, leading to the formation of irreversible aromatic byproducts such as methylpyridine. The research highlights the critical role of molecular topology in solvent stability, suggesting AMP-AEP-MDEA as a promising candidate for large scale CO 2 capture to provide clean environment.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123610
·
IF 7.5
Xiaotong Jiang,Liju Bai,Zixuan Hao,Jianchao Luo,Yaxing Zhang,Wenwei Wu,Can Lv,Mengdie Li,Tejraj M. Aminabhavi,Helei Liu
In continuation of our ongoing studies to explore efficient and stable solvent systems for CO 2 capture, herein a systematic investigation is reported on the absorption-desorption performance, thermal and oxidative degradation of the ternary mixed amine system. Effect of different anti-degradation agents on degradation performance of the system was investigated by investigating absorption and desorption rates. Degradation products and reaction pathways were analyzed via GC-MS technique to show that the ternary system has advantages of fast absorption, high saturated absorption capacity, rapid desorption and complete desorption. Absorption capacity of the system was nearly 7000 mL, while the initial desorption peak rate exceeded 2 mL/s. The absorption-desorption reaction mechanism as well as thermal and oxidative degradation pathways were investigated. By the addition of anti-degradation agent to the mixed solution, thermal and oxidative degradation inhibition was optimal, reducing the thermal degradation rate to 10%. Antioxidant degradation rate decreased by 35% compared to the original system. An excellent mixed amine solution formula with superior comprehensive performance was obtained. The study provided a theoretical basis and technical support for the application of the chosen system in CO 2 capture applications.
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高影响因子
APPLIED CATALYSIS A-GENERAL
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2026
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IF 4.8
Zhiliang Guo,Huiyu Liu,Bo Jin,Rufang Peng,Qingchun Zhang
A practical strategy was proposed to prepare interlayer Ni-Co DACs. • The Ni-Co DACs achieve a high FE CO of 97% at −0.7 V. • The interlayer Ni-Co DACs possess superior catalytic activity, selectivity, and durability. Developing highly efficient, selective, and stable electrocatalysts for the electrochemical CO 2 reduction reaction (CO 2 RR) is crucial for mitigating energy and environmental challenges. This work presents a practical strategy for synthesizing spatially discrete yet strongly synergistic interlayer dual-metal atom catalysts (DACs) with a Ni-Co configuration through pyrolysis of core-shell zeolite imidazolate frameworks (ZIFs). The resulting CoNC@NiNC catalyst features a core-shell structure where CoNC is encapsulated within NiNC. The strong interaction between the layers of NiNC and CoNC increases the density of active sites, ensures the stability of the structure, facilitates mass or charge transfer, and may produce synergistic interaction between the active sites in core and shell, which can effectively catalyze the conversion of CO 2 to CO. Benefiting from the unique interlayer Ni-Co configuration, the CoNC@NiNC electrocatalyst achieved minimal onset overpotential, high CO Faraday efficiency (FE CO = 97%), and robust operational stability at −0.7 V vs. reversible hydrogen electrode ( vs. RHE). This study demonstrates the promising potential of interlayer DACs for efficient CO 2 RR, more importantly, establishes a viable method for developing interlayer DACs, utilizes the strong interlayer interactions to drive this complex reaction, and inspires further exploration of interlayer DACs in energy conversion and beyond. Download: Download high-res image (152KB) Download: Download full-size image The interlayer dual-metal atom catalysts (DACs) with controlled local coordination environments and three-dimensional spatial structures can efficiently convert CO 2 into high-value chemicals or fuels. Herein, a practical strategy was proposed to prepare interlayer Ni-Co DACs, which have core-shell structure consisted of CoNC encapsulated within NiNC (denoted as CoNC@NiNC), by self-assembly and high-temperature pyrolysis core-shell zeolite imidazolate frameworks (ZIFs) precursor. The practice reveal that the interlayer Ni-Co DACs possess superior catalytic activity, selectivity, and durability, which demonstrates the great potential as highly efficient catalysts for CO 2 RR.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Xiangyun Liao,Chengdong Kong,Yanchi Jiang,Xiaojiang Wu,Zhongxiao Zhang
Chemical absorption with amines offers an attractive solution for large-scale carbon mitigation, but its practical application is impeded by high regeneration energy consumption. Despite extensive efforts to accelerate regeneration through chemical catalysis, inefficient gas-liquid mass transfer during desorption remains a major bottleneck. Herein, we report a microcavity-engineered desorption packing fabricated via nanosecond laser etching to promote bubble nucleation and release. Benefiting from the enhanced mass transfer, the optimized desorption packing enhances the maximum desorption rate by 92.2% and reduces the relative heat duty by 35.8% compared to the blank case, without significant performance degradation after multiple desorption cycles. Mechanistic studies show that the laser-induced microcavities can entrap gas to form stable gas nuclei sites, reducing the supersaturation barrier for bubble nucleation and thus accelerating the amine regeneration. The universality of this microcavity engineering strategy is demonstrated by its successful implementation on different substrate materials, including Ni, Ti, and Fe. This study provides new ideas for the design and fabrication of highly efficient desorption packings.
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高影响因子
GREEN CHEMISTRY
·
2026
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IF 10.6
Yangyang Jiang,Yuxin Liu,Yuanli Qi,Yurou Shao,Dong Wang,Benshuai Guo,Jingyan Zhao,Zhibin Zhou,Yuntao Lei,Lili Jin
The capture and utilization of carbon dioxide (CO2) from the post-combustion of fossil fuels has been identified as a highly effective strategy for reducing carbon emissions. Herein, a series of novel substituted benzenesulfonamide ionic liquids (BSA-ILs) were designed and synthesized via facile acid–base neutralization reactions for the purpose of achieving reversible CO2 capture and catalyzing CO2 chemical fixation. Addressing the inherently high viscosity of neat BSA-ILs (551.2–7785.7 mPa s), propylene carbonate (PC), a green product derived from CO2 chemical fixation, was selected as a diluent to form BSA-IL mixed absorbents (BSA-IL-MAs). The optimized system exhibited a high CO2 uptake capacity of 1.38 mol of CO2 per mol BSA-IL, an excellent CO2/N2 selectivity of 18.36, and a remarkable 99.0% conversion of epichlorohydrin under mild, solvent-free, metal-free, halogen-free, co-catalyst-free and atmospheric pressure conditions. Meanwhile, the findings demonstrated a certain positive correlation between the CO2 uptake capacity/conversion and the pKa of the substituted BSA. Notably, the BSA-IL system retained nearly intact CO2 capture performance and catalytic activity after five consecutive absorption–desorption and catalytic cycles, with an extremely low E-factor of 0.11. Spectroscopic characterization confirmed the formation of a new carbonyl moiety peak in CO2-saturated BSA-ILs, indicating that chemisorption dominated the CO2 uptake process. NMR investigations and DFT calculations further elucidated the interactions between BSA-ILs, CO2 and epoxide substrates, validating the feasibility of the proposed reaction pathways. This work provides a sustainable, efficient and industrially feasible integrated platform for CO2 capture and utilization, offering a paradigm for low-carbon catalytic conversion systems.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123407
·
IF 7.5
Inam Ullah,Syed Musab Ahmed,Hao Lou,Zeeshan Abbasi,Zubair Ahmad,Muhammad Usman,Wenlong Wu,Zhandong Wang
The practical application of CO 2 methanation is often hindered by water-induced limitations. Conventional sorbent-assisted catalyst systems employ adsorbents merely as passive water scavengers, neglecting their potential role in reaction kinetics. Herein, we report a layer-by-layer catalyst-zeolite architecture that overcomes these limitations by synergistically promoting low-temperature CO 2 activation while enabling effective in-situ water management. This ordered configuration maximizes interfacial contact, allowing the hydrophilic NaA zeolite to actively capture and activate CO 2 at reduced temperatures while continuously removing the water by-product from the Ni/ZrO 2 surface. Consequently, the system achieves 81% CO 2 conversion with 100% CH 4 selectivity at 200 ℃. This work demonstrates that integrating Ni/ZrO 2 catalyst with a functional NaA zeolite provides an energy-efficient and robust strategy for sustained low-temperature CO 2 methanation.
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高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
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2026
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IF 2
Di An,Le-Kai Hou,Chuan-Zong Fan,Jia-Chen Xing,Yi-Jie Jiang,Hua-Qiang Shi,Jia-Hui An,Wei Wang,Qun-Xing Luo
We synthesized a homologous series of alkyl amidines with chain lengths from C 4 to C 18 and systematically investigated their physicochemical properties, CO 2 responsiveness and applications. Key findings demonstrate a dual dependence of properties on the alkyl chain length and CO 2 -induced protonation. Both unprotonated and protonated surfactants show an inverted volcano-shaped relationship between surface tension and chain length, with optimal surface activity at intermediate lengths (C 8 –C 14 ), whereas oil–water interfacial tension shows minimal dependence on either chain length or CO 2 -induced protonation. Interestingly, these alkyl amidines exhibit distinct chain-length-dependent and CO 2 -switchable emulsification-demulsification behaviors. The unprotonated short-chain surfactants (C 4 –C 10 ) form O/W emulsions but cause demulsification upon protonation, whereas the unprotonated long-chain surfactants (C 12 –C 18 ) cannot emulsify but their protonated forms can stabilize O/W emulsions. The resultant emulsions stabilized by unprotonated short chains show a negatively charged interface due to hydrogen bond-induced water deprotonation by the amidine group, thereby generating the interfacial OH − ions. In contrast, emulsions stabilized by protonated long-chain amidines possess a positively charged interface via CO 2 -induced cationization. Importantly, the unique chain length dependence and CO 2 responsiveness were successfully leveraged for diverse applications, including clay stabilization, crude oil washing, and CO 2 -enhanced foam fire suppression. Graphical The structure-property-application relationships of CO 2 -responsive alkyl amidine surfactants was elucidated.
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高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Hongxu Zhang,Mingyuan Liu,Wenjia Tian,Ke Liu,Mengyao Hao,Hairong Yu,Weikang Sun,Leilei Guo,Xiaoxu Tan,Kaiyu Gao,Tianyi Jiang,Chuanjuan Lü,Qianjin Kang,Cuiqing Ma,Longyang Dian,Ping Xu,Chao Gao
Enzymatic transformation is an attractive strategy for converting C1 compounds derived from CO2 into high-value products. However, its large-scale application is hampered by the necessity of costly cofactors such as ATP, NADH, and tetrahydrofolate. Here, we designed two costly cofactor-free enzymatic pathways that require only 5 enzymes and chemically synthesized cheap cofactor TPP for the production of platform compounds 3-hydroxypyruvate (3-HP) and pyruvate from formaldehyde. We screened and characterized two key enzymes, dihydroxyacetone oxidase catalyzing dihydroxyacetone oxidation and glyoxalase III catalyzing 3-hydroxypyruvaldehyde isomerization, in the designed pathways. We also engineered glyoxalase III SAV0551 toward stereoselectively isomerizing 3-hydroxypyruvaldehyde into l-glycerate to improve the production of 3-HP from formaldehyde. Then, we combined methanol oxidation with alcohol oxidase and the two designed pathways for enzymatic synthesis of 3-HP and pyruvate from CO2-derived methanol. The final concentrations of 3-HP and pyruvate reached 50.2 and 49.6 mM, with synthesis rates of 7.2 mmol C L–1 h–1 and 5.5 mmol C L–1 h–1, respectively. In addition, by coupling transketolase and pyruvate decarboxylase into the enzymatic system, we also achieved the biosynthesis of d-sedoheptulose-7-phosphate and acetoin from CO2-derived 3-HP and pyruvate with concentrations of 46.9 and 23.6 mM, respectively.
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