Article
Engineering, Chemical
Ge Gao, Wufeng Jiang, Xiaoshan Li, Zhenghong Zhao, Cong Jiang, Cong Luo, Fan Wu, Liqi Zhang
Summary: Energy consumption is crucial in determining the suitability of chemical absorbents for capturing CO2. Polyamines with amino functional groups have recently received attention for their ability to effectively capture CO2. This study investigated the structures of seven polyamines with excellent CO2 capture performance in relation to reaction rate and CO2 absorption heat. The results showed that an increase in the ratio of secondary amino functional group to primary amino group led to a decrease in CO2 absorption heat and an increase in CO2 cyclic capacity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhijun He, Yaozu Wang, Yihe Miao, Heying Wang, Xuancan Zhu, Jia Li
Summary: This study adopts the concept of mixed polyamines to prepare efficient CO2 capture materials in mesoporous SBA-15. The synergy of TEPA and DEA enhances amine efficiency and reduces regeneration temperature, while the introduction of hydroxyl groups from DEA improves CO2 adsorption and desorption kinetics. The SBA-15 loaded mixed polyamine with a weight ratio of TEPA to DEA equaling to 4 exhibits promising CO2 adsorption performance and potential application.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Linlin Chen, Shijian Lu, Lei Zhang, Chunjin Zhang, Ling Liu, Guojun Kang, Hua Tang, Siming Chen
Summary: Using three different compositions of fly ash as catalysts, this study demonstrated excellent catalytic performance in the MEA-CO2 absorption-desorption process, indicating its potential for reducing energy consumption and improving CO2 absorption efficiency in CO2 separation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Chemical
Yun Li, Houfang Lu, Yingying Liu, Kejing Wu, Yingming Zhu, Bin Liang
Summary: In this study, nano-SiO2 was used to enhance CO2 absorption and desorption in high-viscosity DBU-glycerol solution. The effects of ultrasonic time, solids loading, and particle/cluster size of SiO2 on absorbent properties and absorption performance were investigated. The addition of nano-SiO2 significantly improved the absorption and desorption processes, by decreasing the average particle size and increasing the interfacial area between gas and liquid. The results showed that nano-SiO2 can effectively enhance both absorption and desorption processes in high-viscosity solutions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Thermodynamics
Weifeng Zhang, Yuanlong Xu, Zhaoxiong Deng, Qiuhua Wang
Summary: The study demonstrates that the efficiency of chemical desorption can be significantly improved by using different desorption agents and operating under specific conditions. Under optimal conditions, the desorption rate can reach high levels, providing a promising alternative to traditional thermal desorption methods.
Article
Engineering, Chemical
Fariba Zarei, Peyman Keshavarz
Summary: For the first time, amino acid groups were added to Fe3O4 nanoparticles to enhance CO2 absorption and desorption. The modified nanoparticles showed higher stability and presence of amino groups, resulting in increased CO2 absorption capacity. Moreover, Fe3O4@arginine, Fe3O4@histidine, and Fe3O4@glycine nanofluids significantly improved CO2 desorption enhancement.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Huancong Shi, Xiaofang Cheng, Jiacheng Peng, Hongliang Feng, Paitoon Tontiwachwuthikul, Jiawei Hu
Summary: A novel tri-solvent MEA+EAE+AMP was prepared to overcome the challenges of slow kinetics and high energy cost in CO2 capture technology. The optimized concentrations for absorption and desorption were found to be 0.2+2 mol/L and 0.4+2 mol/L respectively. The tri-solvent showed better absorption performance and a higher CO2 loading compared to MEA+BEA+AMP.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Weifeng Zhang, Zhaoxiong Deng, Qiuhua Wang, Juan Li, Xuefei Qiu
Summary: A study on the chemical desorption of CO2 to sequester it again found the optimal reaction conditions and analyzed the effects of time, temperature, and stirring rate on the desorption efficiency of CO2. MEA exhibited the highest desorption rate among the five solutions, and multiple-cycle experiments showed its excellent absorption capacity.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Review
Chemistry, Multidisciplinary
Lirong Li, Chengbin Zhang, Yongping Chen, Xiangdong Liu
Summary: This paper aims to realign and evaluate the impact of nanoparticles on the removal of CO2 by methanol solution, by comparing the findings and conclusions of related studies with the reality of industrial processes. The article begins with a discussion on the industrial operations of CO2 removal without nanoparticles and then reviews the feasibility of different variants of the Rectisol process. The study also investigates the benefits of nanoparticles in improving the Rectisol process. A critical review of available results is provided, along with suggestions for industrial application evaluation.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Thermodynamics
Fariba Zarei, Farideh Bagherzadeh Jahromi, Abbas Elhambakhsh, Peyman Keshavarz
Summary: This study aimed to investigate the ability of functionalized-magnetic nanoparticles (NPs) in improving CO2 absorption and reducing regeneration energy demand in a bubble column reactor. The results showed that Fe3O4@Aspartic and Fe3O4@Lysine NPs improved CO2 loading by 15.3% and 21.4% respectively, compared to Fe3O4 NPs. The functionalized-magnetic NPs also showed better effects on CO2 desorption, and the CO2 loading was reduced by 58.9% and 55.1% using Fe3O4@Lys and Fe3O4@Asp respectively at 70 degrees C.
Article
Engineering, Environmental
Taishi Kataoka, Yasuhiko Orita, Yusuke Shimoyama
Summary: A new semi-solid absorbent, phase-separation gel, was developed to improve CO2 capture and desorption processes. The cyclic capacity and initial desorption flux of the gel were found to be higher than those of other homogeneous gels, suggesting that the phase-separation absorbent fixed inside the gels improves the initial desorption flux due to the larger interfacial area between the CO2-rich and CO2-lean phases.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Hitesh D. Rawate, Prakash D. Vaidya
Summary: The catalytic regeneration of N-ethylethanolamine (EEA) solvent using commercially available metal oxide catalysts was investigated in this study. The results showed that the Al2O3 catalyst performed well in lowering temperature and reducing energy consumption, while the CO2 desorption efficiency and energy consumption were improved when ZrO2 catalyst was impregnated with SO4(2-).
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Thermodynamics
Ying Wu, Ying Dai, Weiyi Xie, Haijun Chen, Yuezhao Zhu
Summary: This study conducts a performance analysis on the integration of post-combustion CO2 capture and solar energy in a coal-fired power plant. The results show that the integration of solar energy can significantly improve the electric efficiency and reduce costs. The use of absorption heat pump and absorption heat exchanger enables heat integration among the steam cycle, the CO2 capture process, and the solar energy system.
Article
Chemistry, Multidisciplinary
Qiang Sun, Jia Xiong, Hongxia Gao, Teerawat Sema, Wilfred Olson, Zhiwu Liang
Summary: In this study, cation exchange resin catalysts were used to improve the regeneration process of monoethanolamine (MEA) in carbon capture by enhancing the CO2 desorption rate and amount. The results showed that the Amberlyst-15 resin significantly increased the rate of amine regeneration and improved the amount of CO2 desorbed by 21%. Additionally, the effects of methanol and ethanol solvents were explored for energy-saving CO2 desorption.
Article
Engineering, Chemical
Tianci Li, Congning Yang, Puttipong Tantikhajorngosol, Teerawat Sema, Paitoon Tontiwachwuthikul
Summary: This research presents experimental results on the absorption and desorption performance of various single and blended solvents. The results show that the selected blank solvent blends exhibit better absorption and desorption performance compared to the blank benchmark solution. The performance of catalyst-aided CO2 desorption is found to be strongly influenced by the rich loading and operating temperature.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)