Article
Chemistry, Multidisciplinary
Konstantin Khivantsev, Xinyi Wei, Libor Kovarik, Nicholas R. Jaegers, Eric D. Walter, Pascaline Tran, Yong Wang, Janos Szanyi
Summary: Pd-loaded FER and SSZ-13 zeolites were compared as low-temperature passive NOx adsorbers under practical conditions, showing that the NO release temperature decreased with an increase in CO concentration for both adsorbers. The presence of CO activated Pd ions in FER, leading to improved NOx storage, while also explaining the high resistance of Pd/FER to hydrothermal aging.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Andres Sala, Eduardo Perez-Botella, Jose L. Jorda, Angel Cantin, Fernando Rey, Susana Valencia
Summary: The study introduces a newly synthesized zeolite named ITQ-69 and evaluates its application as a selective adsorbent for light olefins/paraffins separations. Results show promising kinetic selectivity for light olefin separations in the C3 fraction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Deniz Zengel, Simon Barth, Maria Casapu, Jan-Dierk Grunwaldt
Summary: Positioning catalysts in front of the turbocharger has gained interest due to the earlier temperature onset and positive pressure effects. However, challenges such as high pollutant concentrations and incomplete conversion of hydrocarbons were identified. Results showed that increasing pressure improved hydrocarbon oxidation and reduced HCN formation, but low emissions only achieved at high temperatures. Increasing pressure also boosted NOx conversion activity, compensating for the negative effect of hydrocarbons.
Article
Engineering, Environmental
Yang Xu, Xiaofeng Wang, Mengyue Qin, Qingbo Li
Summary: This review discusses the reaction mechanism and SO2/H2O poisoning in CH4-SCR, highlighting the importance of active sites, oxygen, and intermediate species. It also provides a comprehensive overview of representative metal-exchanged zeolite catalysts and proposes strategies for improving SO2/H2O tolerance and low-temperature catalytic activity through the introduction of a second metal and reducing agent. Suggestions for future studies are also presented.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Paul Kim, Jeroen Van Der Mynsbrugge, Hassan Aljama, Trevor M. Lardinois, Rajamani Gounder, Martin Head-Gordon, Alexis T. Bell
Summary: This study investigates the adsorption of NO on Pd/H-CHA and finds that NO adsorption is governed by Pd2+ and Pd+ sites at different temperatures. In addition, the IR spectroscopy results show that the feature at 1860 cm(-1) is attributed to weakly-bound NO on Pd2+ and strongly-bound NO on Pd+ is responsible for the feature at 1810 cm(-1).
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Energy & Fuels
Silen U. H. Sumer, Sinan Keiyinci, Ali Keskin, Himmet Ozarslan, Zeycan Keskin
Summary: This study investigated the NOx conversion efficiency of Mo-Cu-Ag/TiO2/Cordierite catalyst at low temperatures using fusel oil as a reductant. The properties of the catalyst were analyzed by various methods, and SCR performance tests were conducted under real diesel exhaust gas conditions. The results showed that the catalyst achieved a maximum NOx conversion rate of 85.94% and a minimum of 78.99% under different temperature, engine load, and space velocity conditions.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Zeycan Keskin, Tayfun Ozgur, Himmet Ozarslan, Ali Cem Yakaryilmaz
Summary: In this study, the low temperature activity of Ag-Ti-Cu/Cordierite catalyst was investigated using LPG and H-2-LPG mixture as reductant. The results showed that the presence of H-2-LPG as reductant significantly improved SCR performance, especially at low temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Heesoo Lee, Narankhuu Jamsran, Hongjae Kang, Dae Hoon Lee
Summary: This study investigated the reduction of NOx using hydrocarbons as reducing agents through a rotating arc plasma reformer for selective catalytic reduction. The results showed that the carbon-to-oxygen ratio and catalyst temperature influenced the efficiency of NOx removal.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Multidisciplinary
Ismail Hakki Savci, M. Zafer Gul
Summary: This study investigates the urea spray behavior in the selective catalytic reduction (SCR) aftertreatment system of heavy-duty diesel engines through experimental and numerical analysis. A custom test rig is built to simulate the exhaust aftertreatment system of diesel vehicles, and the effects of droplet size and velocity distribution on flow characterization are discussed. A validated numerical model is used to study urea-flow mixing dynamics and develop a urea mixer. The results show that smaller droplets enhance mixing and catalyst efficiency.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Chunmiao Jia, Jiajian Gao, Kuniadi Wandy Huang, Vishal Jose, Prapisala Thepsithar, Jong-Min Lee
Summary: CuO/γ-Al2O3 catalyst showed excellent catalytic activity in methanol-SCR process, efficiently removing NOx without deactivation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Shuang Liu, Yan Huang, Shanshan Li, Qingjin Lin, Jianli Wang, Shaohua Xie, Fudong Liu, Haidi Xu, Yaoqiang Chen
Summary: A W/CZ catalyst with a pyrochlore structure was successfully developed, showing excellent NOx adsorption-storage ability below 180°C and superior NH3-SCR activity above 180°C. The pyrochlore structure increased oxygen vacancies and enhanced redox property, significantly promoting NOx adsorption-storage at low temperature and improving NH3-SCR performance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Applied
Mohammed-El Amine Benchaabane, Gabriel Trierweiler Goncalves, Emily Bloch, Jean-Louis Paillaud, T. Jean Daou, Sandrine Bourrelly, Gerald Chaplais, Philip L. Llewellyn
Summary: This article presents a study on the adsorptive separation of propylene and propane using zeolitic adsorbents. Various characterization techniques were used to determine the adsorption properties and selectivities of the materials. The results demonstrate the potential of certain zeolites for the separation of propylene from propane by adsorption-based technologies.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Physics, Fluids & Plasmas
Tao Zhu, Xing Zhang, Nengjing Yi, Haibing Liu, Zhenguo Li
Summary: The study successfully increased the conversion rate of NOx by combining non-thermal plasma and Co/Pt/Ba/γ-Al2O3 catalyst, and found that the concentrations of oxygen, water vapor, and sulfur dioxide significantly affect the efficiency of NOx conversion.
PLASMA SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Alex M. Djerdjev, Pramith Priyananda, Jeff Gore, James K. Beattie, Chiara Neto, Brian S. Hawkett
Summary: Ammonium nitrate is a major commodity chemical used as a fertilizer and explosive. Research has shown that NOx gas accumulates during an induction period, leading to the generation of nitrous acid. Layered double hydroxides and the urea/MnO2 catalyst system have been found to be effective alternative methods for inhibiting the thermal decomposition of ammonium nitrate.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Haruna Kitamura, Tomoka Sumi, Shohei Kubota, Shinya Kokuryo, Kazuya Tamura, Koji Miyake, Yoshiaki Uchida, Manabu Miyamoto, Norikazu Nishiyama
Summary: Ni-loaded dealuminated Beta zeolite catalysts showed high catalytic activity and stability for ETP reaction with low nickel content. Temperature-programmed H2 reduction and NH3-desorption analyses indicated that the active sites were Ni species grafted onto the defective silanols of dealuminated zeolites.
APPLIED CATALYSIS A-GENERAL
(2023)
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)