Article
Engineering, Chemical
Kai Wang, Guangzhen Li, Yanhong Li, Yuan Chen, Ling Zhang, Zhiying Zhu, Zhiyong Xu, Wenbo Zhao
Summary: In this study, a novel amine alkyl siloxane (BTDMBA) was synthesized and used to capture SO2. The thermal decomposition temperature of BTDMBA is 160℃, comparable to that of ionic liquids (ILs), but with lower viscosity (125 mPa center dot s).
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Bo Wang, Jinyu Wang, Yuan Chen, Zhiyong Xu, Wenbo Zhao
Summary: In this study, a N-Benzyl-N-methyl-1-(methyl diphenyl silyl) methanamine (MPSA) with high thermal stability was synthesized for the absorption of SO2. The absorption capacity was measured at low partial pressures and thermodynamic parameters were calculated to analyze the absorption behavior. The desulphurization rates and absorption capacities at different temperatures and partial pressures were simulated based on thermodynamic parameters. An optimal absorption temperature and an optimal desorption temperature were defined, and a function was proposed to calculate them. The kinetic behavior of the absorption was described using a pseudo-first-order model, and kinetic data at different temperatures and partial pressures were simulated based on a combination of kinetic and thermodynamic parameters. Finally, selectivity and cycles experiment showed that MPSA has excellent CO2 selectivity and thermal regeneration performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Lurui Wan, Kai Wang, Yuan Chen, Zhiyong Xu, Wenbo Zhao
Summary: In this study, a low viscosity and high thermal stability SO2 absorbent with dual interacting sites was successfully synthesized. The absorbent showed the highest absorption enthalpy change and entropy change values among reported SO2 absorbents, and exhibited lower viscosity and comparable thermal stability to ILs.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Chemical
Raheleh Zafari, Fernanda G. Mendonca, R. Tom Baker, Clemence Fauteux-Lefebvre
Summary: Adsorbents made from amine-functionalized cellulose were studied for SO2 capture, showing a significantly higher adsorption capacity compared to pristine nanocrystalline cellulose. The effects of functionalization time, temperature, and amount of amine were assessed, and the adsorption mechanism for SO2 capture was confirmed. The study also investigated the impact of different operating adsorption temperatures and flow rates on the capture capacity and breakthrough time of SO2.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Thermodynamics
Kaiqi Jiang, Kangkang Li
Summary: This study proposes a new amine process that utilizes CO2 absorption enthalpy for building heating. By modifying the process and extracting heat, high efficiency CO2 capture and enthalpy recovery are achieved. This method significantly reduces CO2 avoidance cost and is economically viable with increasing demand for heating.
Article
Engineering, Environmental
Zeyu Geng, Qin Xie, Zhongjiao Fan, Weining Sun, Wei Zhao, Junhao Zhang, Jianqiu Chen, Yun Xu
Summary: Four tertiary amine-based protic ionic liquids have been designed and tested for SO2 uptake, showing a high capacity for SO2 and a high selectivity for SO2/CO2 separation. The kinetic study demonstrated their efficient and quick absorption of SO2 under ambient pressure. Due to their excellent recyclability and fast absorption process, these PILs are considered as a potential alternative to traditional absorbents in flue gas desulfurization (FGD).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Thermodynamics
Qingrong Yin, Weiwei Mao, Danqing Chen, Chunfeng Song
Summary: The CO2 chemical absorption-microalgae conversion (CAMC) system combines the advantages of chemical absorption and biological methods to achieve simultaneous low-energy CO2 capture and green resource application. This study evaluated the effects of adding tertiary amine TEMDA and space hindered amine DACH to the CAMC system and found that the addition of TEMDA increased cell concentration and growth rate, as well as carbon conversion efficiency and sequestration capacity.
Article
Energy & Fuels
Chao Wang, Qingwan Bi, Yanling Huo, Zhenghongri Zhang, Duanjian Tao, Yue Shen, Qian Zhu, Zhigang Chen, Huaming Li, Wenshuai Zhu
Summary: The research demonstrated that amine-based ternary deep eutectic solvents exhibit good performance in absorbing sulfur dioxide, with rapid absorption rate, desirable absorption capacity, and cycling performance. The Lewis acid-base interaction and hydrogen bonding between the alkaline ternary DES and acidic SO2 contribute to the effective absorption, providing a novel route for preparing ideal absorbents for effective SO2 capture.
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
Engineering, Environmental
Hong-Chao Lan, Ya-Ting Zou, Yi-Chao Wang, Ning-Ning Cheng, Wen-Long Xu, Hai-Long Peng, Kuan Huang, Li-Yun Kong, Jun Du
Summary: A new composite sorbent was developed for efficient capture of SO2, showing excellent SO2 adsorption efficiency at extremely low pressures.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Matthew P. Confer, Alice DeSimone, Hope Burnham, William McLeod, Tonya M. Klein, Shane C. Street, David A. Dixon
Summary: Experimental determination of solubility and enthalpy of solution for various amine boranes in different solvents revealed differences in dissolution processes, with dimethyl sulfoxide solutions being the most exothermic. Increased methyl-substitution on the amine led to more endothermic processes. The study also validated the accuracy of density functional theory in predicting solubility of amine borane materials in polar solvents through comparison with experimental values.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Cong Jiang, Maohong Fan, Ge Gao, Wufeng Jiang, Xiaoshan Li, Cong Luo, Liqi Zhang, Fan Wu
Summary: Metal oxyhydroxide AlOOH of nanoscale has been synthesized and applied in carbon capture technology, showing accelerated CO2 desorption rate and reduced energy consumption. It exhibits excellent catalytic performance and cyclic stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Takayuki Kushida, Sakurako Wada, Yukio Furukawa
Summary: We developed a thermochemical model to evaluate the CO2 regeneration energies in aqueous solutions of MEA, DEA, AMP, and IPAE. The regeneration heat includes reaction heat, sensible heat, and vaporization heat. We calculated the reaction heat using our model and determined the concentrations of all chemical species in the CO2 absorption and release states. The contribution of protonation reaction is significant in sterically hindered amines AMP and IPAE, while both protonation and carbamate hydrolysis play important roles in MEA and DEA. Sensible heat dominates the regeneration heat compared to reaction and vaporization heats.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Dongliang Wang, Jiangpeng Xie, Huairong Zhou, Li Liu, Hongwei Li, Guixian Li, Xueying Fan
Summary: This study focuses on developing an energy-efficient SO2 capture technology through the screening and process improvement of amine-based adsorbents. The results show that the desorption reaction heat has a significant impact on regeneration energy consumption, while latent heat consumption and sensible heat consumption are related to process configuration. The top-steam heat pump process can greatly reduce regeneration energy consumption, and the PZ absorbent system has the highest potential for the flue gas SO2 capture process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Fengsheng Liu, Tao Wang, Hao Dong, Weishan Liu
Summary: This study aimed to improve CO2 capture and kinetics performance for DAC by using AEEA to functionalize metal sites in MOFs. The grafting experiments indicated that high surface area and low acidity of MOFs effectively promoted amine grafting. The MF-Cr-AEEA demonstrated excellent thermal and cold stability, and low semi-adsorption times below 21 min.
CHEMICAL ENGINEERING JOURNAL
(2023)
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)