Article
Engineering, Environmental
Hyun June Choi, Donghui Jo, Suk Bong Hong
Summary: The study investigates the CO2 adsorption properties of potassium merlinoite zeolites with different Si/Al ratios and reveals the significant impact of framework Si/Al ratio on the CO2 adsorption mechanism.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Elliott L. Bruce, Veselina M. Georgieva, Maarten C. Verbraeken, Claire A. Murray, Ming-Feng Hsieh, William J. Casteel, Alessandro Turrina, Stefano Brandani, Paul A. Wright
Summary: Small pore zeolites like merlinoite have high potential for selective CO2 adsorption. Na- and Cs-exchanged forms shift to narrow-pore form after dehydration, while K-form remains wide-pore. K- and Cs-forms show effects of CO2 adsorption on cation site distributions and framework configuration.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Energy & Fuels
Shuo Li, Xiaoqiang Zhang, Shijia Dong, Yupeng Du, Xiaoping Chen, Pengzhao Wang, Xiang Feng, Chaohe Yang
Summary: This study investigated the influence mechanism of Si/Al ratio on the isobutane/butene (I/O) ratio in the pore of H-BEA zeolite using CB-GCMC methods under realistic alkylation conditions. It was found that the I/O ratio in the pore decreased dramatically with decreasing Si/Al ratio due to the higher adsorption heats of 1-butene over the acid sites. There is an optimal Si/Al ratio for C4 alkylation, which is consistent with experimental results. Furthermore, external surface modification of the catalyst was identified as an effective method to improve the I/O ratio in the pore.
Article
Engineering, Environmental
Tai T. T. Nguyen, Jian-Bin Lin, George K. H. Shimizu, Arvind Rajendran
Summary: This study measured the adsorption equilibrium of pure CO2 and N-2 on a hydrophobic metal-organic framework called CALF-20, using volumetric and gravimetric methods. The competitive adsorption of CO2 and N-2 and the column dynamics were also examined. The results showed that CALF-20 had comparable performance with benchmark materials zeolite 13X and UTSA-16 in capturing CO2 under specific conditions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Zhonghao Peng, Ze Liu, Yu Gao, Jiayu Liu, Dongmin Wang, Hongying Liu, Yanbo Zhang, Li Li
Summary: This paper investigates the effects of various factors on the synthesis of DDR zeolite using silica fume as raw material, and determines the optimum synthesis condition, which reduces the cost of synthesis and achieves the utilization of waste materials.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Hongtai Chen, Zhengguo Zhang, Tuoping Hu, Xiutang Zhang
Summary: A robust hybrid material of {(Me2NH2)[InZn(TDP)(OH2)]center dot 4DMF center dot 4H(2)O}(n) (NUC-42) was developed, featuring interlaced hierarchical nanochannels shaped by six rows of undocumented [InZn(CO2)(6)(OH2)] clusters, representing the first 5p-3d nanochannel-based heterometallic metal-organic framework. The catalytic performance of activated NUC-42a was evaluated for CO2 cycloaddition with styrene oxide and deacetalization-Knoevenagel condensation reactions, showing high efficiency under mild conditions.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Applied
Tatiana Chenet, Annalisa Martucci, Mirco Cescon, Giulia Vergine, Giada Beltrami, Lara Gigli, Matteo Ardit, Massimo Migliori, Enrico Catizzone, Girolamo Giordano, Luisa Pasti
Summary: The adsorption of L-lysine on two ZSM-5 materials with different Si/Al ratios revealed that the aluminum content plays a crucial role in tuning the adsorption process. Higher Si/Al ratios led to lower saturation capacity and binding constants. High resolution X-ray diffraction data showed that the adsorption of L-lysine in ZSM-5 is a surface-confined supramolecular self-assembly process, influenced by pH and hydration state.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yiming Jiang, Wei Chen, Fei Zhang, Siyu Chen, Can Li, Pablo Beato, Fengtao Fan
Summary: A three-step crystallization model of SUZ-4 zeolite was proposed based on the evolution of solid and liquid phases in UV-Raman spectra. The spatially organized 4 MRs key species was extracted for synthesizing the SUZ-4 with increased Si-to-Al ratio. Understanding the crystallization mechanism of SUZ-4 is important for its practical application in the industry.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Thermodynamics
Hamid Rajaei, Feridun Esmaeilzadeh, Dariush Mowla
Summary: The Si/Al ratio of 50 in HZSM-5 zeolites was found to have the highest specific surface area and porosity, while decreasing the Si/Al ratio resulted in higher enthalpy of Bronsted sites and increased acidity strength. This shift also led to changes in the length of the O-H moiety or the acidity strength of Bronsted sites, as indicated by NH3-TPD profiles.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Chemical
Yong Cheng, Longjun Xu, Chenglun Liu
Summary: NaP1 zeolite was successfully prepared using red mud as raw material, exhibiting excellent adsorption properties with a satisfactory regeneration capacity. The adsorption mechanism followed the pseudo second order kinetic and Freundlich isotherm model, with diffusion and electrostatic attractions playing important roles in the process.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Environmental
Guo-chang Song, Xing-yu Yang, Zhong-wei Li, Qiang Song
Summary: In this study, the adsorption of As2O3 by a mixture of CaO, SiO2, and Al2O3 was studied at 1200 degrees C using a fixed-bed experimental system. The coupling effects of Ca, Si, and Al enhanced the adsorption of As2O3, with multiple minerals showing higher adsorption capacity than single minerals. The adsorption amount of As first increased and then decreased with changes in the CaO:(SiO2 +Al2O3) and SiO2: Al2O3 ratios. The adsorbed As was mainly enriched in Ca-Si-Al mineral, including Ca2Al2SiO7. Density Functional Theory calculation revealed the formation of Al-O, O-As, and Ca-O bonds between As2O3 molecules and the Al, O, and Ca sites on the Ca2Al2SiO7 surface. Si and Al promoted electron transfer and enhanced the adsorption ability of the Ca sites. A Si/Al ratio close to 1:1 favored the formation of Si-O-Al structures, further enhancing the adsorption. These findings can guide the optimization of coal blending strategies and the modification of adsorbents to reduce As emissions during coal combustion.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
Shohei Tada, Duanxing Li, Mina Okazaki, Hiroka Kinoshita, Masahiko Nishijima, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki
Summary: Highly efficient CO2 utilization methodologies combining methanol synthesis catalysts and methanol conversion catalysts have been developed. The use of ZnO/ZrO2 as the catalyst for methanol synthesis and MOR zeolites as the catalyst for methanol conversion enables one-pass hydrocarbon production via CO2 hydrogenation. By physically mixing these catalysts, bifunctional catalysts are formed, which operate at low pressure and have shown promising results in terms of olefin selectivity.
Article
Chemistry, Inorganic & Nuclear
Chaohui He, Peng Zhang, Sai Ma, Yujuan Zhang, Tuoping Hu
Summary: Developing ultra-stable adsorbents with high CO2 adsorption performance is an effective solution for the separation of CO2/CH4 and CO2/N-2.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Environmental
Chongming Chen, Jinxing Yu, Guosheng Song, Kai Che
Summary: CO2 capture is a necessary option for carbon reduction, and adsorption-based CO2 capture technology provides a promising approach for lowering the energy cost of the mature amine-scrubbing method. Recent studies have focused on materials with high adsorption capacities, while overlooking desorption performance and the recovery of high purity CO2. In this study, four commercial zeolites were tested for CO2 capture from simulated flue gas, and 5 A zeolite was selected for systematic investigation of desorption behavior. A more practical temperature-swing procedure was proposed for desorption and regeneration of the material, achieving a CO2 stream with over 70% purity and 90% recovery in a single-stage adsorption.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Clemens Jonscher, Markus Seifert, Nils Kretzschmar, Mathias S. Marschall, Mai Le Anh, Thomas Doert, Oliver Busse, Jan J. Weigand
Summary: This article focuses on the relationship between Si/Al ratio and zeolite morphology of microporous ZSM-5 and analyzes the impact of this relationship on the synthesis process. The results show that with an increasing Si/Al ratio, the solid-state transformation accelerates and the morphology shifts from small clusters to larger spherical particles. The acid site density and zeolite morphology determine the selectivity during methanol conversion.
Article
Engineering, Environmental
Xinping Zhang, Yuxin Guo, Xiaoyang Liu, Shun-Yu Wu, Ya-Xuan Zhu, Shao-Zhe Wang, Qiu-Yi Duan, Ke-Fei Xu, Zi-Heng Li, Xiao-Yu Zhu, Guang-Yu Pan, Fu-Gen Wu
Summary: This study develops a nanotrigger HCFT for simultaneous photodynamic therapy and light-triggered ferroptosis therapy. The nanotrigger can relieve tumor hypoxia, induce enhanced photodynamic reaction, and facilitate the continuation of Fenton reaction, ultimately leading to lethal ferroptosis in tumor cells.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Olumide Bolarinwa Ayodele, Toyin Daniel Shittu, Olayinka S. Togunwa, Dan Yu, Zhen-Yu Tian
Summary: This study focused on the semihydrogenation of acetylene in an ethylene-rich stream using two alloyed Pt catalysts PtCu and PtCo. The PtCu catalyst showed higher activity and ethylene yield compared to PtCo due to its higher unoccupied Pt d-orbital density. This indicates that alloying Pt with Cu is more promising for industrial relevant SHA catalyst.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Guowei Chen, Wen-Cheng Chen, Yaozu Su, Ruicheng Wang, Jia-Ming Jin, Hui Liang, Bingxue Tan, Dehua Hu, Shaomin Ji, Hao-Li Zhang, Yanping Huo, Yuguang Ma
Summary: This study proposes an intramolecular dual-locking design for organic luminescent materials, achieving high luminescence efficiency and performance for deep-blue organic light-emitting diodes. The material also exhibits unique mechanochromic luminescence behavior and strong fatigue resistance.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Joren van Stee, Gregory Hermans, Jinu Joseph John, Koen Binnemans, Tom Van Gerven
Summary: This work presents a continuous solvent extraction method for the separation of cobalt and nickel in a millifluidic system using Cyphos IL 101 (C101) as the extractant. The optimal conditions for extraction performance and solvent properties were determined by investigating the effects of channel length, flow rate, and temperature. The performance of a developed manifold structure was compared to a single-channel system, and excellent separation results were achieved. The continuous separation process using the manifold structure resulted in high purity cobalt and nickel products.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yan Xu, Jingai Jiang, Xinyi Lv, Hui Li, Dongliang Yang, Wenjun Wang, Yanling Hu, Longcai Liu, Xiaochen Dong, Yu Cai
Summary: A programmed gas release nanoparticle was developed to address the challenges in treating diabetic infected wounds. It effectively removes drug-resistant pathogens and remodels the wound microenvironment using NO and H2S. The nanoparticle can eliminate bacteria and promote wound healing through antibacterial and anti-inflammatory effects.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Tong Xia, Zhilin Xi, Lianquan Suo, Chen Wang
Summary: This study investigated a highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties. The results demonstrated that the dust suppressant formed a network of multiple hydrogen bonding cross-linking and achieved effective adhesion and solidification of coal dust through various chemical reactions.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jinzhi Cai, Zhenshan Li
Summary: A density functional theory-based rate equation was developed to predict the gas-solid reaction kinetics of CaO carbonation with CO2 in calcium looping. The negative activation energy of CaO carbonation close to equilibrium was accurately predicted through experimental validation.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jianxiong Chen, Fuhao Ren, Ningning Yin, Jie Mao
Summary: This study presents an economically efficient and easily implementable surface modification approach to enhance the high-temperature electrical insulation and energy storage performance of polymer dielectrics. The self-assembly of high-insulation-performance boron nitride nanosheets (BNNS) on the film surface through electrostatic interactions effectively impedes charge injection from electrodes while promoting charge dissipation and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Zijian Li, Zhaohui Yang, Shao Wang, Hongxia Luo, Zhimin Xue, Zhenghui Liu, Tiancheng Mu
Summary: This study reports a strategy for upgrading polyester plastics into value-added chemicals using electrocatalytic methods. By inducing the targeted transfer of *OH species, polyethylene terephthalate was successfully upgraded into potassium diformate with high purity. This work not only develops an excellent electrocatalyst, but also provides guidance for the design of medium entropy metal oxides.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Navneet Singh Shekhawat, Surendra Kumar Patra, Ashok Kumar Patra, Bamaprasad Bag
Summary: This study primarily focuses on developing a sulphur dyeing process at room temperature using bacterial Lysate, which is environmentally friendly, energy and cost effective, and sustainable. The process shows promising improvements in dye uptake and fastness properties.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Dengjia Shen, Hongyang Ma, Madani Khan, Benjamin S. Hsiao
Summary: This study developed cationic PVC nanofibrous membranes with high filtration and adsorption capability for the removal of bacteria and hexavalent chromium ions from wastewater. The membranes demonstrated remarkable performance in terms of filtration efficiency and maximum adsorption capacity. Additionally, modified nanofibrous membranes were produced using recycled materials and showed excellent retention rates in dynamic adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Xiaoyan Wang, Zhikun Wang, Ben Jia, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: Inspired by photosystem II, self-supported Fe-doped NiCoP nanowire arrays modified with carboxylate were constructed to boost industrial-level overall water splitting by employing the concerted proton-coupled electron transfer mechanism. The introduction of Fe and carboxyl ligand led to improved catalytic activity for HER and OER, and NCFCP@NF exhibited long-term durability for overall water splitting.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Pengyao Yu, Ge Yang, Yongming Chai, Lubomira Tosheva, Chunzheng Wang, Heqing Jiang, Chenguang Liu, Hailing Guo
Summary: Thin LTA zeolite membranes were prepared through secondary growth of nano LTA seeds in a highly reactive gel, resulting in membranes with superior permeability and selectivity in gas separation applications.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Baiqin Zhou, Huiping Li, Ziyu Wang, Hui Huang, Yujun Wang, Ruichun Yang, Ranran Huo, Xiaoyan Xu, Ting Zhou, Xiaochen Dong
Summary: The use of machine learning to predict the performance of specific adsorbents in phosphate adsorption shows great promise in saving time and revealing underlying mechanisms. However, the small size of the dataset and insufficient detailed information limits the model training process and the accuracy of results. To address this, the study employs a fuzzing strategy that replaces detailed numeric information with descriptive text messages on the physiochemical properties of adsorbents. This strategy allows the recovery of discarded samples with limited information, leading to accurate prediction of adsorption amount, capacity, and kinetics. The study also finds that phosphate uptake by adsorbents is generally through physisorption, with some involvement of chemisorption. The framework established in this study provides a practical approach for quickly predicting phosphate adsorption performance in urgent scenarios, using easily accessible information.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Paula Alejandra Lamprea Pineda, Joren Bruneel, Kristof Demeestere, Lisa Deraedt, Tex Goetschalckx, Herman Van Langenhove, Christophe Walgraeve
Summary: This study evaluates the use of four esterified fatty acids and three vegetable oils as absorption liquids for hydrophobic VOCs. The experimental results show that isopropyl myristate is the most efficient liquid for absorbing the target VOCs.
CHEMICAL ENGINEERING JOURNAL
(2024)