Article
Biochemistry & Molecular Biology
Ekaterina S. Lokteva, Vera V. Shishova, Nikolay N. Tolkachev, Andrey N. Kharlanov, Konstantin I. Maslakov, Alexey O. Kamaev, Igor Yu. Kaplin, Irina N. Savina, Elena V. Golubina
Summary: By utilizing a mesoporous support based on silica and zirconia, monometallic and bimetallic catalysts were prepared and tested in the hydrodechlorination of 4-chlorophenol in aqueous solution. It was found that the bimetallic FePd/ZS catalyst exhibited excellent activity and stability, while the activation of Pd/ZS by aqueous phenol solution was identified through DRIFT spectroscopy analysis.
Article
Materials Science, Ceramics
Maksym Shevchenko, Denis Shishin, Evgueni Jak
Summary: The Fe-Cr-Si-O system was fully characterized at high temperatures (700-2600 degrees C) using experimental and thermodynamic modeling methods. The experimental technique involved high-temperature equilibration, quenching, and EPMA, while the modeling process included evaluating literature data, developing mathematical models, and optimizing parameters. The results of this study have important applications in pyrometallurgical production, waste electronics recycling, and refractory material design.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Matteo Vanni, Marco Bellini, Silvia Borsacchi, Lucia Calucci, Maria Caporali, Stefano Caporali, Francesco d'Acapito, Marco Geppi, Andrea Giaccherini, Andrea Ienco, Gabriele Manca, Antonio Massimiliano Mio, Giuseppe Nicotra, Werner Oberhauser, Manuel Serrano-Ruiz, Martina Banchelli, Francesco Vizza, Maurizio Peruzzini
Summary: This study provides the first complete structural characterization of 2D BP functionalized with rare discrete Pd-2 units, revealing the existence of interlayer Pd-Pd units and an increase in catalytic activity for the hydrogen evolution reaction. Multiple techniques were utilized to study the morphology of Pd-2/BP nanosheets and to uncover the coordination of Pd-2 units to phosphorus atoms in 2D BP. The presence of Pd-2 units was found to enhance the activity of Pd-2/BP as a catalyst for HER in acidic medium.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Xingli Zheng, Yan Li, Wendian Li, Xianglin Pei, Dongdong Ye
Summary: Researchers used renewable resource chitosan (CS) derived from seafood wastes as carriers to design two different chitosan-supported palladium (Pd) nano-catalysts through different activation methods. The Pd particles were evenly and firmly dispersed on the chitosan microspheres due to the porous structure and functional groups of chitosan, as confirmed by various characterizations. The chitosan supported catalysts (Pd@CS) showed competitive catalytic activity in the hydrogenation of 4-nitrophenol and exhibited excellent catalytic activity, reusability, long-life, and broad applicability in selective hydrogenation of aromatic aldehydes, suggesting potential for green industrial catalysis applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Miha Ravbar, Amadeja Koler, Muzafera Paljevac, Mitja Kolar, Peter Krajnc, Jernej Iskra
Summary: In this study, palladium was immobilized on a highly porous copolymer to obtain a supported catalyst with good catalytic activity and recyclability. The immobilized catalyst was able to catalyze the coupling reaction at room temperature and tolerated various substituents on the aromatic ring.
Article
Energy & Fuels
Ivan Pedroarena, Lucia Grande, Jonathan J. Torrez-Herera, Sophia A. Korili, Antonio Gil
Summary: This research investigates the interactions between alumina-supported nickel catalysts and other metals, and their impact on the catalyst's performance. The reduction capacity of oxide phases has been analyzed, revealing that Pd facilitates the formation of easily reducible NiO species. Furthermore, the impregnation order of Mo and Pd does not significantly affect the catalysts' properties.
Article
Chemistry, Physical
Yu Yang, Gang Wang, Mei Yang, Huanhuan Yang, Meijia Liu, Falu Dang
Summary: The study demonstrated that electronic modulation between Pd and Pt improved the catalytic activity and resistance to poisoning, preventing the deactivation of Pd active components.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yong Zhao, Zhongning Huang, Lianmeng Wang, Xiangyu Chen, Yan Zhang, Xiuqin Yang, Dawei Pang, Jianxin Kang, Lin Guo
Summary: The study successfully prepared amorphous Pd(II) complex solid spheres loaded with Pd nanoparticles using a simple and gentle method, and then coated a thin mesoporous SiO2 shell on the surface. The combination of Pd(II) and Pd(0) provided a new approach for the enhanced catalytic performance of Pd(II-0)@m-SiO2 catalyst in Suzuki reactions.
Article
Energy & Fuels
Sefika Kaya, Omruye Ozok-Arici, Arif Kivrak, Aykut Caglar, Hilal Kivrak
Summary: An efficient synthesis method for 2-(2,5-dimethylphenyl)-3-iodobenzo[b]thiophene was developed and its performance as an anode catalyst was investigated. The Pd-doped benzothiophene organic catalyst showed high stability and low charge transfer resistance, indicating its potential as an alternative electro-catalyst in fuel cell applications.
Article
Chemistry, Multidisciplinary
Priti Sharma, Debdyuti Mukherjee, Sujoy Sarkar, Daniel Mandler, Rajender S. Varma, Manoj B. Gawande, Radek Zboril, Yoel Sasson
Summary: A straightforward and mild protocol for photochemical in situ selective hydrogenation was achieved using an Al-H2O system as a hydrogen donor and a Pd-g-C3N4 photocatalyst. This method showed excellent yield and selectivity for a wide range of olefins and nitro compounds (>99%) under visible light and ambient conditions. The Pd-g-C3N4 photocatalyst also demonstrated efficient bifunctional electrocatalytic activity for overall water splitting.
Article
Chemistry, Physical
Yingjie Wang, Xiaoyan Shi, Zhongqi Liu, Yulong Shan, Wei Shi, Yunbo Yu, Hong He
Summary: This work examined Pd-SSZ-13 catalysts with 1.0 wt% Pd loading as passive NOx adsorber (PNA) materials. Various Pd-SSZ-13 catalysts were prepared by calcining the initially prepared Pd-SSZ-13 under static air following different steps. The results showed that the interaction of PdOx nanoparticles and Pd(OH)2 with Bronsted acid sites promoted the migration of Pd species from the external surface to inside the crystal during thermal treatment, leading to highly dispersed Pd ions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Yingjie Hu, Yuxin Mei, Baining Lin, Xuhong Du, Fan Xu, Huasheng Xie, Kang Wang, Yonghua Zhou
Summary: In this study, an active and stable catalyst was achieved using defective UiO-66 as a support for Pd, effectively addressing the issues of Pd loss and aggregation during long term operation. The catalyst showed good activity and selectivity in a continuous trickle-bed reactor, providing new potential for industrial application in the synthesis of MIBK and MIBC.
Article
Chemistry, Multidisciplinary
Fangfang Liu, Hongmian Wang, Zhentan Dai, Jiahao Wu, Yongshen Dou, Sanmao Liu, Yongfeng Li
Summary: The adopted ligand type of a palladium precursor plays a crucial role in the microstructure, morphology, and catalytic performance of Pd-based monolith catalysts obtained through redox reactions. Different ligands lead to varying specific surface areas, pore volumes, and catalytic activities in toluene oxidation reactions.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Materials Science, Multidisciplinary
Hyeon-Seok Do, Won-Mi Choi, Byeong-Joo Lee
Summary: Research on representative Co-Cr-Fe-Mn-Ni high-entropy alloys has been conducted to develop new HEAs with improved strength, utilizing computational thermodynamic prediction to efficiently design the new HEAs. The phase equilibria in HEAs can be effectively predicted by CALPHAD type techniques, but challenges still exist due to incompleteness in thermodynamic descriptions for constituent ternary systems. Developing a self-consistent thermodynamic description for the quinary system involved completing descriptions for constituent ternary sub-systems and carrying out new assessments, with the reliability confirmed by comparing calculated vertical sections of the quinary phase diagram with experimental information.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Yang Wu, Wenhu Yang, Hailong Zhang, Haidi Xu, Yi Jiao, Lin Zhong, Jianli Wang, Yaoqiang Chen
Summary: This study improves the performance of Pd/Y2O3-ZrO2 catalyst by constructing silicate patches on the support surface. This modification optimizes palladium chemistry, enhances CH4 conversion, reduces surface oxygen vacancies, and inhibits hydroxyl accumulation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Plant Sciences
Anh Tuan Hoang, Ranjna Sirohi, Ashok Pandey, Sandro Nizetic, Su Shiung Lam, Wei-Hsin Chen, Rafael Luque, Sabu Thomas, Muslum Arici, Van Viet Pham
Summary: This paper presents recent advances and potential advantages of microalgae in biofuel production, as well as their role in the energy and environmental sectors. The challenges related to cultivation, harvesting techniques, and downstream processes are discussed, along with promising solutions for industrial-scale production. Additionally, the paper analyzes the role of microalgae in the circular economy.
PHYTOCHEMISTRY REVIEWS
(2023)
Article
Thermodynamics
Ding Luo, Ye Zhao, Yuying Yan, Hao Chen, Wei-Hsin Chen, Ruochen Wang, Ying Li, Xuelin Yang
Summary: In this study, two transient models, a transient fluid-thermal-electric multiphysics numerical model and a hybrid transient CFD-analytical model, are proposed to predict the dynamic performance of automobile thermoelectric generator systems. The models consider the heat source fluctuation, temperature dependence of thermoelectric materials, and the coupling of different physical fields. The results show that the dynamic output power is mainly related to the exhaust temperature due to thermal inertia, while the dynamic conversion efficiency is mainly related to the exhaust mass flow rate. The hybrid model overestimates the output performance, particularly the conversion efficiency, with average errors of 2.90% and 13.58% for output power and conversion efficiency, respectively, compared to the numerical model. The transient models predict lower output performance compared to steady-state analysis, and the models are experimentally verified. This work fills a gap in theoretical models for predicting the dynamic response characteristics of automobile thermoelectric generator systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Weng Cheong Tan, Lip Huat Saw, Ming Chian Yew, Dongyang Sun, Wei-Hsin Chen
Summary: A novel polypropylene-based dual electrolyte aluminum-air battery is developed in this study, with potassium hydroxide as anolyte and sulfuric acid as catholyte. The results show that the dual-electrolyte system can improve the open circuit voltage and peak power density.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Agricultural Engineering
Soheil Valizadeh, Yasin Khani, Abid Farooq, Gopalakrishnan Kumar, Pau Loke Show, Wei-Hsin Chen, See Hoon Lee, Young-Kwon Park
Summary: Steam gasification of microalgae over Ni-perovskite oxide catalysts resulted in higher gas yields and H2 selectivity compared to Ni/Al2O3 catalysts. The improvement in Ni dispersion and interaction with the support was achieved by using perovskite oxide supports (CaZrO3, Ca(Zr0.8Ti0.2)O3, and Ca(Zr0.6Ti0.4)O3) with partial substitution of B. The best performance was observed for Ni/Ca(Zr0.8Ti0.2)O3 due to the synergistic effect of metallic Ni and elements present in the perovskite structures, resulting in enhanced oxygen mobility.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Thanh-Binh Nguyen, Thi-Kim-Tuyen Nguyen, Wei-Hsin Chen, Chiu-Wen Chen, Xuan-Thanh Bui, Anil Kumar Patel, Cheng-Di Dong
Summary: In this study, the effectiveness of sunflower seed husk biochar (HZSF) prepared by ZnCl2-activated and hydrothermal carbonization in removing tetracycline (TC) from an aqueous solution was studied. The physical and chemical properties of the materials were characterized using different surface analysis methods. The specific surface area of HZSF was significantly enhanced compared to non-modified biochar, resulting in improved TC adsorption capacity.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Shih-Wei Yen, Dillirani Nagarajan, Wei-Hsin Chen, Duu-Jong Lee, Jo-Shu Chang
Summary: In this study, Aurantiochytrium sp. CJ6 was cultivated with heterotrophic fermentation using sorghum distillery residue (SDR) hydrolysate as the feedstock, without the addition of nitrogen sources. Optimal operating parameters were determined, and batch cultivation achieved high biomass concentration and astaxanthin content. Continuous-feeding fed-batch (CF-FB) fermentation further increased biomass concentration and astaxanthin production. This study demonstrates the potential of using SDR as a sustainable feedstock for the production of high-value products like astaxanthin.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Zafar Said, Maham Aslam Sohail, Adarsh Kumar Pandey, Prabhakar Sharma, Adeel Waqas, Wei-Hsin Chen, Phuoc Quy Phong Nguyen, Van Nhanh Nguyen, Nguyen Dang Khoa Pham, Xuan Phuong Nguyen
Summary: Integrating nanotechnology into phase change materials (PCMs) is a novel approach to improve thermal properties and performance in thermal energy storage. Nanofluids and nano-enhanced PCMs (NEPCMs) show promise in increasing thermal conductivity and improving energy charging and discharging duration. This review discusses recent advances in applying nanotechnology to PCMs, focusing on its applications in the solar energy sector. The review also highlights the potential benefits, challenges, and environmental concerns associated with using nanofluids and NEPCMs in various applications.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Thermodynamics
Wei-Hsin Chen, Manuel Carrera Uribe, Ding Luo, Liwen Jin, Lip Huat Saw, Ravita Lamba
Summary: In recent years, the use of unsustainable and inefficient energy sources has led to environmental pollution. Thermoelectric generators (TEGs) have the potential to recover wasted heat, but their energy conversion efficiency needs improvement. This study optimizes commercially available TEGs by considering hot side temperature, heat sink size, and wind airspeed. The results show that hot side temperature has the greatest influence on the output power, while the impact of wind speed is minimal.
APPLIED THERMAL ENGINEERING
(2023)
Review
Agricultural Engineering
Amit Kumar Sharma, Praveen Kumar Ghodke, Nishu Goyal, Prakash Bobde, Eilhann E. Kwon, Kun -Yi Andrew Lin, Wei-Hsin Chen
Summary: This review investigates the possibilities and recent technological advancements for synthesizing biochar from pine waste, as well as explores techniques for enhancing its properties and integrated applications in various fields. The paper also highlights the limitations of current strategies and emphasizes the need for further research to address challenges in pine waste-based biochar synthesis. By promoting sustainable and effective utilization of pine wastes, this review contributes to environmental conservation and resource management.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Congyu Zhang, Wei-Hsin Chen, Shih-Hsin Ho, Ying Zhang, Steven Lim
Summary: This study conducts a comparative advantage analysis of oxidative torrefaction of corn stalks to explore the benefits of oxidative torrefaction for upgrading biochar fuel properties. The results show that oxidative torrefaction is more efficient in achieving mass loss, energy density improvement, elemental carbon accumulation, and surface functional groups removal, leading to better fuel properties. The study also establishes a linear correlation between comprehensive pyrolysis index, torrefaction severity index, and elemental carbon and oxygen component variation.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Loghman Rezaei, Samrand Saeidi, Andras Sapi, M. R. Abdollahi Senoukesh, Gyula Grof, Wei-Hsin Chen, Zoltan Konya, Jiri Jaromir Klemes
Summary: The solar chimney power plant is a simple and clean technology to generate electricity from solar radiation. This study developed a novel collector design with hanging metallic tubes to improve efficiency. Experimental and computational fluid dynamics analysis validated the new design and found that the metallic tubes significantly affected temperature and velocity distribution. The efficiency of the collector increased with the hanging metallic tubes and was also influenced by the geometry variation.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Biotechnology & Applied Microbiology
Larissa Richa, Baptiste Colin, Anelie Petrissansa, Ciera Wallace, Allen Hulette, Rafael L. Quirino, Wei-Hsin Chen, Mathieu Petrissans
Summary: Torrefaction is a potential pretreatment method to produce biochar for fuel or construction material. The role of potassium in the torrefaction process and its effect on thermal degradation were investigated. It was found that potassium acted as a catalyst, promoting char formation and increasing char content in the biomass.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Biotechnology & Applied Microbiology
C. Naveen, Praveen Kumar Ghodke, Amit Kumar Sharma, Wei-Hsin Chen
Summary: This study investigates the feasibility of producing energy from PMDE solid waste through pyrolysis. The pyrolysis process results in the formation of condensable volatiles, non-condensable gases, and solid biochar. The non-condensable gas contains CO, H2, and CH4 in significant amounts, as well as other gases in minor quantities. Kinetic and thermodynamic analysis were performed to understand the reaction mechanism, and a bio-circular economic approach for PMDE solid waste was presented.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Thermodynamics
Congyu Zhang, Yong Zhan, Wei-Hsin Chen, Shih-Hsin Ho, Young-Kwon Park, Alvin B. Culaba, Ying Zhang
Summary: This study evaluates the relationship between torrefaction parameters and fuel properties using various indicators. It finds that some indicators can accurately reflect the changes in different fuel properties. Additionally, the variations of torrefaction severity index and contact angle are correlated to the changes in the fuel property of the torrefied biochar.
Article
Environmental Sciences
Larissa Richa, Baptiste Colin, Anelie Petrissans, Jasmine Wolfgram, Ciera Wallace, Rafael L. Quirino, Wei-Hsin Chen, Mathieu Petrissans
Summary: This study evaluates the possibility of using catalytic torrefaction as a pretreatment to improve wood pyrolysis and combustion for greener biochar production. The findings show that catalytic torrefaction can significantly decrease the devolatilization peak during combustion, making the wood's combustion similar to that of coal.
ENVIRONMENTAL POLLUTION
(2024)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.