JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2024
·
IF 5.9
Chengzhi Liu,Yanqi Zou,Kunmei Su,Zhenhuan Li
The emission of significant amounts of CO 2 from human industry has caused severe environmental damage, necessitating effective CO 2 capture methods for sustainable development. Membrane technology stands out as one of the most effective and economical solutions. In recent decades, polymer membranes have been recognized for their viability in gas separation applications. Aliphatic polycarbonates (APCs) are particularly notable due to their high chain segment flexibility, degradability, ease of processing, and the presence of carbonate groups, which enhance their affinity for CO 2 . This study uses a one-pot melt polycondensation process to synthesize three high-molecular-weight APCs: poly(1,4-butylene carbonate) (PBC), poly(1,5-pentamethylene carbonate) (PPC), and poly(1,6-hexamethylene carbonate) (PHC) from dimethyl carbonate and various diols. To improve the mechanical properties of the APC separation membranes, capping modification was applied. The molecular weights of PBC, PPC, and PHC were 6.48 × 10 4 g/mol, 4.78 × 10 4 g/mol, and 5.76 × 10 4 g/mol, respectively. These membranes were prepared by the evaporative solvent method. The PHC membrane demonstrated a CO 2 permeability of 20.84 Barrer and a CO 2 /N 2 selectivity of 22.24 at 35 °C under 0.1 MPa, approaching Robeson’s upper bound and indicating substantial potential for application.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Lipei Fu,Jing Gong,Qingling Liu,Qianli Ma,Minglu Shao,Kaili Liao,Ailian Chang,Tongyu Zhu,Zhangkun Ren,Tao Wang
In this work, through mixing alkyl primary amines of C n H 2n+1 NH 2 （n=6, HA; n=12, DA; n=18, ODA） and disodium 4-formylbenzene-1, 3-disulfonate (DFD) at 1:1 mol ratio, three novel dynamic imine surfactants (DFD-HA, DFD-DA and DFD-ODA) were synthesized. The imine bond was verified by infrared spectroscopy (IR) and nuclear magnetic resonance (NMR). After preparing the emulsion, DFD-DA exhibited superior stability among the three surfactants at lower concentrations (< 20 mM). Subsequently, an emulsifier system (DFD-DA/LHSB) with excellent interfacial activity and emulsification stability was obtained by blending DFD-DA with lauramidopropyl hydroxy sulfobetaine (LHSB). The system effectively reduced the interfacial tension to the order of 10 −2 mN/m. At a total concentration of 5 g/L and mole ratio (DFD-DA: LHSB = 1:2), the emulsion could be stable for more than 60 days. Contact angle measurements substantiated the superior wettability inversion capability of the system, facilitating the formation of oil-in-water emulsions more effectively. Furthermore, this system possesses remarkable CO 2 responsiveness. After CO 2 injection, the emulsion can be completely demulsified within 45 s in a broad mole ratio range. Changing the relative content of DFD-DA and LHSB can also dynamically regulate the demulsification rate of emulsion. In contrast to previous imine surfactants, the system can achieve full demulsification under higher pH conditions (about 6.0), thereby significantly enhancing the response efficiency and alleviating the equipment corrosion. This discovery provides a new approach to tackling the problems associated with surfactant flooding and heavy oil demulsification, holding important implications for enhancing oil recovery (EOR).
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Nature Synthesis
·
2024
·Vol. 3
·期 7
·891-902
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IF 0
Cai Yanming,Yang Ruixin,Fu Jiaju,Li Zhe,Xie Liangyiqun,Li Kai,Chang Yu-Chung,Ding Shichao,Lyu Zhaoyuan,Zhang Jian-Rong,Zhu Jun-Jie,Lin Yuehe,Zhu Wenlei
The selective one-step CO 2 electroreduction reaction (CO 2 RR) to acetate and propanol has garnered intense interest. Here we report the design of self-pressurizing nanoscale capsule catalysts for the CO 2 RR. A high-pressure CO intermediate environment is created around copper catalysts by a permselective enclosure. Microkinetic modelling, 13 CO 2 / 12 CO co-feed experiments and in situ Raman spectroscopy confirm that a unique CO–CO 2 coupling path is involved, which is only initiated at high CO intermediate pressure. This pathway benefits acetate production due to the kinetic and energetic advantages of COCO 2 *. The acetate Faradaic efficiency is 38.5 ± 2.2% (8 times higher than that achieved without enclosure) and the acetate partial current density is 328 ± 19 mA cm −2 , which surpasses the performance of previous CO 2 RR catalysts. In situ investigation indicates that the CO pressure inside the nanoscale capsule catalysts can reach 8 ± 3 bar. Furthermore, self-pressurizing nanoscale capsule catalysts with a CuI-derived core can reduce CO 2 to propanol with a Faradaic efficiency of 25.7 ± 1.2% and a conversion rate of 155 ± 3 mA cm −2 .
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Ting Qu,Jinpeng Zhang,Jinbo Song,Jieying Jing,Wen-Ying Li
The magnesium oxide (MgO) sorbents doped with different NaNO 3 /NaNO 2 molar ratios were prepared to improve their stability over multiple cycles. Regulating the NaNO 3 /NaNO 2 molar ratio effectively improved the CO 2 adsorption performance of the sorbent. The MgO sorbent with the NaNO 3 /NaNO 2 molar ratio of 0.8 exhibited outstanding performance and stability. Characterization and density functional theory calculations confirmed the positive effects of the appropriate NaNO 3 amount in improving the adsorption activity, whereas the suitable NaNO 2 amount slowed the sintering step and improved stability. Notably, the molten salt remained stable during cycling and did not decompose even at high regeneration temperatures, guaranteeing the cyclic stability of the sorbent. Further characterization showed that the CO 2 sorption drop in the first few cycles was ascribed to the decline in the active surface owing to the aggregation of MgO particles, incomplete regeneration of sorbents, and segregation of molten salt on the sorbent surface.
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JOURNAL OF POLYMER RESEARCH
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2024
·Vol. 31
·期 10
·1-11
·
IF 2.6
Chen Yueqing,Huang Zhenhong,Chen Haijian,Ai Jiaoyan,Song Lina,Liu Baohua
Waterborne polyurethanes emulsions (WPU) based on polyethylene carbonate diol (PECD) were synthesized, characterized and modified by polypropylene carbonate diol (PPCD) and organosilicon KH-792. The mechanical, thermal and hydrolysis resistance properties of waterborne polyurethanes were comprehensively investigated. The results show that PECD based WPU has very excellent mechanical properties. The tensile strength and the elongation at break the PU was up to 73 MPa and 1040%, which was much higher than that reported for similar types of PPCD-based WPU. It was found that water absorption of PECD based WPU can be decreased dramatically, from 40.9% to 21.1%, after 50% PECD was replaced by PPCD, while tensile strength only decreased from 73.0 MPa to 63.4 MPa. The addition of KH-792 has great influence on PECD based WPU, when 1% KH-792 was added, the water absorption rate decreased from 21.1% to 11.88%, the mechanical strength remained at 63.3 MPa, the WPU film remained transparent after soaking in 80 ℃ hot water for 4 h.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xingchi Li,Guowei Chen,Yiping Zhao,Yang He,Li Chen
The primary issues impeding oxygenation efficacy in extracorporeal membrane oxygenation (ECMO) are low CO 2 /O 2 selectivity and insufficient permeability of CO 2 . Herein, sulfonated polyphenylene oxide (SPPO) was chosen as a candidate for the oxygenation membrane material. The CO 2 -affinitive sulfonic acid groups on the molecular chain of SPPO enhance the interaction between CO 2 and the SPPO membrane; thereby, the CO 2 /O 2 selectivity is effectively enhanced. When the solid content of the casting solution is 23 %, the SPPO membrane achieves a CO 2 /O 2 selectivity of 17.0, almost as selective as human alveoli. The blood clotting time, red blood cell adhesion, platelet adhesion, and hemolysis ratio were employed to evaluate the blood compatibility of SPPO materials. The results demonstrated that the manufactured SPPO membranes exhibited good hemocompatibility. This work offers novel thinking for researching and applying effective artificial lung membranes.
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Small
·
2024
·Vol. 20
·期 37
·2401530
·
IF 13
Zezhong Xie,Qiushi Wang,Hao Yang,Jin Feng,Jian Chen,Shuqin Song,Changgong Meng,Kun Wang,Yexiang Tong
The unavoidable and unpredictable surface reconstruction of metallic copper (Cu) during the electrocatalytic carbon dioxide (CO 2 ) reduction process is a double-edged sword affecting the production of high-value-added hydrocarbon products. It is crucial to control the surface facet reconstruction and regulate the targeted facets/facet interfaces, and further understand the mechanism between activity/selectivity and the reconstructed structure of Cu for CO 2 reduction. Based on the current catalyst design methods, a facile strategy combining chemical reduction and electro-reduction is proposed to achieve specified Cu(111) facets and the Cu(110)/(111) interfaces in reconstructed Cu derived from cuprous oxide (Cu 2 O). The surface facet reconstruction significantly boosted the electrocatalytic conversion of CO 2 into multi-carbon (C 2+ ) products comparing to the unmodified catalyst. Theoretical and experimental analyses show that the Cu(110)/(111)s interface between Cu(110) and a small amount of Cu(111) can tailor the reaction routes and lower the reaction energy barrier of C–C coupling to ethylene (C 2 H 4 ). The work will guide the surface facets reconstruction strategy for Cu-based CO 2 electrocatalysts, providing a promising paradigm to understand the structural variation in catalysts.
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PubMed
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Shenzhen Cong,Si Sun,Yijing Zhang,Ming Wang,Zhehua Jia,Youhua Zhao,Huan Pang
Metal–organic framework (MOF) membranes offer a wide range of applications, including simultaneous hydrogen generation and decarbonization. The permselectivity of gas molecules can be considerably increased by optimizing the oriented of MOF membranes, and it is possible to construct MOF membranes with high permeance and high selectivity. Here, chelation-assisted interfacial growth is used to prepare ZIF-L membranes for H 2 /CO 2 separation. The growth rate of the ZIF-L crystal plane is regulated by optimizing the interface Zn 2+ diffusion, and a ZIF-L membrane with preferred orientation is constructed for efficient separation of H 2 /CO 2 . The optimized ZIF-L membrane has an H 2 permeance of over 2000 GPU, and the H 2 /CO 2 selectivity exceeds 30. Additionally, the prepared ZIF-L membrane exhibits outstanding operating stability and tolerance, making it a promising candidate for industrial applications.
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DYES AND PIGMENTS
·
2025
·
IF 4.2
Yue Huang,Daixuan Gong,Huanda Zheng,Jie Chen,Siqi Zhu,Laijiu Zheng
The solubility of dyes in supercritical carbon dioxide (ScCO 2 ) is a critical parameter in their processing. This study focuses on triazine-based reactive disperse dyes. Their solubility in supercritical carbon dioxide was determined using the static weighing method. The measurement pressure range was 11-23 MPa, and the temperature range was 343.15-383.15 K. The experimental data were analyzed using multiple models. These models included density-based semi-empirical models (Chrastil, MST, Bartle, K-J, and SS) and state equation models (SRK and PR). Compared to the state equation method, the semi-empirical model method does not require the acquisition of complex physical parameters of the solute and exhibits superior correlation performance. The results indicate that the K-J model provides the best prediction accuracy for experimental data, with AARD% values of 3.18, 3.60, and 3.76, respectively. These findings provide critical solubility data and thermodynamic insights for the rational selection of carbon dioxide supercritical fluid dyes, dye structure design, and operational parameters for textile dyeing processes.
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Science Advances
·
2025
·Vol. 11
·期 35
·
IF 12.5
Zhiyong Yu,Qing Yao,Wei An,Hangjun Xu,Jiaqi Su,Juan Wang,Ying Zhang,Huile Jin,Yonggang Feng,Xiaoqing Huang
Electrocatalytic CO 2 reduction (ECR) to formic acid faces challenges in separating and purifying a formate-electrolyte mixture. In situ utilization of this mixture presents a promising yet underexplored solution. Here, we report the synthesis of Bi x Pd 1− x Te nanocrystals (NCs) via a microwave-assisted cation topological exchange approach, enabling the precise tuning of surface oxygen affinities to simultaneously optimize the ECR and catalytic transfer hydrogenation (CTH) of phenol. Optimized Bi 0.1 Pd 0.9 Te NCs achieve a 92% formate Faradaic efficiency at −0.9 volts versus reversible hydrogen electrode and a production rate of 860 millimoles per hour per gram of catalyst at 100 milliamperes per square centimeter. This formate-electrolyte mixture serves as an effective hydrogen donor, enabling 98% selectivity toward cyclohexanone in phenol hydrogenation. Mechanistic studies show uniformly dispersed Bi sites create an oxygen affinity gradient, enhancing *OCHO adsorption for formate production and promoting noncoplanar phenol adsorption for selective cyclohexanone formation. This work pioneers synergistic ECR-CTH integration, establishing an innovative CO 2 valorization and biomass upgrading strategy.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yadong Du,Xiangtong Meng,Jun Qi,Benxiang Gong,Yangjun Ma,Jiachun Li,Hongqi Zou,Jieshan Qiu
Electrochemical CO 2 reduction (ECR) to value-added products provides a pathway to reduce CO 2 emission and to enable a closed carbon cycle. Compared to powdered catalysts, self-supporting electrocatalysts have more prominent advantages such as high charge transfer capacity and the ability to serve directly as working electrodes without the need for binders. Herein, a self-supporting catalyst featuring SnO 2 nanoparticles incorporated into porous carbon nanofiber (SnO 2 -PCNF) was crafted via electrospinning followed by annealing in CO 2 . SnO 2 -PCNF can directly function as working electrode for ECR to produce HCOOH, achieving a high Faradaic efficiency of 92.3%. Also, the SnO 2 -PCNF can stably catalyze ECR process for more than 50 h. Theoretical calculations and in-situ Raman spectroscopy elucidate the underlying ECR mechanism over SnO 2 -PCNF, wherein the catalyst significantly reduces the energy barrier of the rate-determining step. This effectively suppresses the competitive hydrogen generation. This work provides some insights into design of binder-free and high-performance ECR electrocatalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Liju Bai,Shuai Wang,Xiaotong Jiang,Zixuan Hao,Tejraj M. Aminabhavi,Helei Liu
CO 2 capture is crucial for achieving carbon emission reduction targets. At present, porous carbon is regarded as an effective CO 2 capture material. However, the limited adsorption capacity restrains its practical application, due to the insufficient adsorption sites. In this work, N-doped porous carbon derived from heterogeneous polymers is employed to investigate efficient CO 2 capture. Porous carbon was prepared by pyrolyzing KOH activated melamine-phenolic resin-based heterogeneous polymers. By optimizing pyrolysis temperature, the derived carbon material exhibits a high specific surface area (1274.4 m 2 /g), an abundant microporous structure (0.823 nm in pore diameter), and a substantial N retention (5.22 wt%). These characteristics synergistically enhance its CO 2 adsorption performance. Consequently, an exceptional CO 2 capture capacity of 100.8 mL/g (~4.5 mmol/g) at 25 °C and 1 bar was obtained, surpassing the most reported porous carbon materials. Besides, the prepared porous carbon demonstrates outstanding CO 2 /N 2 selectivity (25.0) and rapid adsorption kinetics, fitting the pseudo-first-order model (R 2 = 0.997) with reaching the equilibrium in 60 min. The calculated low adsorption heat (~25 kJ/mol) confirms physical adsorption mechanism, further supported by excellent renewability and cyclic stability over the five consecutive PSA cycles. Comparative analysis highlights its superior N efficiency and CO 2 capture performance relative to conventional porous carbons. These findings not only elucidate the critical role of the pore structure and N-doped in CO 2 adsorption validating the potential of the material for scalable industrial applications, offering a sustainable pathway for carbon capture technologies.
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