Article
Engineering, Chemical
Xun Huang, Xue-Gang Li, Wen-De Xiao, Zidong Wei
Summary: An improved autothermal co-current flow reactor for the methanol to propylene (MTP) process was proposed in this study, which utilizes heat exchange to continuously remove reaction heat, enhancing propylene selectivity and catalyst efficiency. A neural network model trained by machine learning was employed to describe the diffusion-reaction interaction inside the catalyst particle. Experimental results showed that under appropriate conditions, the reactor exhibited higher propylene selectivity and catalyst utilization.
Article
Engineering, Chemical
Bijan Hejazi, Neda Shabany
Summary: A two-phase model based on SAPO-34 catalyst particles was developed for simulating a bubbling fluidized bed reactor and catalyst regenerator. The model showed good agreement with experimental data and was successfully used for design and optimization of the MTO process. The development of this model provides convenience for the analysis of the MTO process.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Engineering, Chemical
Salih Obut
Summary: A one-dimensional heterogeneous fixed-bed methanol synthesis reactor model was developed and validated for optimizing carbon conversion and methanol production rate. After optimization, carbon conversion increased by 12% and methanol production rate by 48%, with stoichiometric number within industrial values.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Daulet Izbassarov, Judit Nyari, Bulut Tekgul, Erkki Laurila, Tanja Kallio, Annukka Santasalo-Aarnio, Ossi Kaario, Ville Vuorinen
Summary: Research on enhancing methanol production efficiency using a numerical simulation tool, validated through experiments showing optimized parameters can increase yield within a certain range, with catalyst configuration found to have a significant impact on yield.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Guanping Huo, Xueyan Guo
Summary: By utilizing a structure-resolved CFD approach, the study investigates the potential advantages of using monolithic configurations in fixed-bed reactors, highlighting the impact of geometric features on flow patterns and transport phenomena. Findings show that monolithic structures can eliminate wall effects, reduce pressure drop, and further enhance conduction and reaction performance.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Engineering, Environmental
Jie Zhu, Jiangtao Yu, Peiwen Wu, Jixing Liu, Haiyan Ji, Peng Cui, Yanhong Chao, Wenshuai Zhu, Haiyan Liu, Zhichang Liu
Summary: The 3D-CeO2/ATP monolithic adsorbents were successfully constructed through a 3D printing strategy, showing excellent adsorption desulfurization performance of more than 85 % sulfur removal at room temperature. Combined with a 3D-printed multifunctional fixed-bed reactor, a reaction process capable of adsorption-elution was designed for deep adsorption of sulfide in fuel and resource recovery of high-value sulfide products. The structure and physicochemical property of the 3D-CeO2/ATP monolithic adsorbents were characterized, and the adsorption and elution mechanism were investigated in detail.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Huajing Zhang, Chao Xu, Hangyu Yu, Hao Wu, Fei Jin, Feng Xiao, Zhirong Liao
Summary: This paper proposes a tubular fixed-bed reactor with helical fins to improve the cold spot problem and enhance the methanol conversion. The effects of geometric parameters of the helical fins, temperature, inlet flow velocity, and steam to methanol molar ratio on the reaction performance are numerically studied, showing significant influence.
Article
Engineering, Chemical
Ming Li, Luchang Han, Xiao Luo, He'an Luo
Summary: In this study, kinetics experiments of the propylene chlorination fast reaction were conducted at low and high temperatures, proposing corresponding reaction mechanisms and models. It was found that radical mechanism occurs at high temperatures while molecular mechanism at low temperatures. By considering reversible reaction steps and hydrogen extraction processes, the proposed kinetics model shows good agreement with experimental data, introducing the concept of critical reaction temperature for determining dominant reaction mechanisms. The combination of high and low-temperature kinetics models in tubular reactor simulation can reflect the wide temperature variation influence and guide industrial reactor design.
Article
Green & Sustainable Science & Technology
H. M. Schellevis, T. N. van Schagen, D. W. F. Brilman
Summary: This study focuses on quantifying the influence of operational parameters on energy duty and CO2 productivity in the Direct Air Capture process, developing a dynamic model and conducting sensitivity analyses. Results show that high desorption temperature is preferred for energy duty, while high sorbent working capacity reaches an optimum for CO2 productivity. Additionally, weather conditions and diurnal variations can significantly impact the performance of the process and should be considered during design and operation.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Energy & Fuels
Kemal F. Hastadi, Tejas Bhatelia, Jim Patel, Paul A. Webley, Vishnu K. Pareek, Milinkumar T. Shah
Summary: This study introduces a novel forward mixed multistage packed bed reactor (FMMPBR) for methanol synthesis. The FMMPBR is divided into multiple stages with flow diverters to optimize reactant concentration and catalyst amount. Through simulation and optimization, the FMMPBR shows higher carbon conversion and lower catalyst requirement compared to the standard tubular reactor. Additionally, it achieves reduced temperature deviation and higher production rate.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Chemistry, Multidisciplinary
A. Sanz-Martinez, J. Lasobras, J. Soler, J. Herguido, M. Menendez
Summary: The MTG process converts methanol to hydrocarbons within the boiling point range of gasoline, and the stability of the process is improved by carrying out both reaction and regeneration simultaneously in a two-zone fluidized bed reactor.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Xintong Li, Jianfei Sun, Mantong Xue, Jianzhong Yin
Summary: This paper investigates the conversion of CO2 into propylene carbonate by immobilizing ionic liquid into the pores of SBA15, obtaining an efficient catalyst. The continuous method is proposed to achieve higher yields in a shorter time.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Engineering, Chemical
Isabella Correa, Rui P. Faria, Alirio E. Rodrigues
Summary: The unprecedented global biodiesel production has resulted in the generation of massive amounts of crude glycerol as a byproduct. Sorption-enhanced strategies can overcome the thermodynamic limitations of solketal production via glycerol ketalization. An experimental and fitting method was used to determine the adsorption equilibrium parameters and assess the influence of reaction temperature on the process. The study also investigated solketal synthesis on a larger scale using a simulated moving-bed reactor.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Jian Peng, Bin Yu, Shaowei Yan, Le Xie
Summary: This study investigates the axial dispersion characteristics of a fixed-bed reactor with different packed structures using computational fluid dynamics (CFD) simulations. The accuracy of the CFD model was validated by comparing the results with experimental data. The residence time distribution characteristics in the fixed-bed reactor were evaluated using the tracer pulse method, and the mixing performance of the fixed bed was explained based on the distribution characteristics of tracer concentration and fluid velocity.
Article
Chemistry, Applied
Liangliang Zhang, Tingjun Fu, Juan Shao, Yuhang Guo, Han Li, Yating Han, Guowu Zhan, Zhong Li
Summary: This study specifically investigated the catalytic synergy of two different SiO2/Al2O3 ratio ZSM-5 catalysts with complementary acidic properties in methanol stepwise aromatization. The results showed that high proximity in the powder mixing mode excessively enhanced the synergy but had a short catalyst lifetime. The granule mixing mode slightly improved the catalyst lifetime. Packing two catalysts in separated dual beds mode prolonged the lifetime but reduced the aromatics selectivity. Interestingly, the appropriate proximity in the designed alternative sequence beds mode intensified intermediates transport and relieved the negative influence of aromatic reversion, resulting in increased aromatics selectivity with a satisfactory lifetime.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
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)