Article
Green & Sustainable Science & Technology
Mohamed Shaker, Vikash Kumar, Christopher M. Saffron, Muhammad Rabnawaz
Summary: Chemical recycling is an effective way to recycle contaminated and mixed plastics waste. This study reports two important discoveries: the use of table salt for the low temperature pyrolysis of mixed polyolefins, which significantly increases oil and gas contents without producing undesirable wax, and the successful pyrolysis of metallized plastics using table salt. These findings suggest that table salt can be a transformative approach for inexpensive and efficient pyrolysis of mixed plastics waste.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Analytical
Oguzhan Akin, Robin John Varghese, Andreas Eschenbacher, Jogchum Oenema, Mehrdad Seifali Abbas-Abadi, Georgios D. Stefanidis, Kevin M. Van Geem
Summary: The effect of vapor-catalyst contact time and catalyst properties on the recovery of light olefins (C2-C4) from post-consumer mixed polyolefinic waste pyrolysis vapors was studied using five different solid acid catalysts. HZSM-5 with Si/Al ratio of 11 and 27 showed the highest light olefins yields at a very short contact time, while longer contact time decreased olefin yields and increased aromatics production. HZSM-22 was not effective in cracking pyrolysis vapors to C2-C4 olefins at a short contact time, but increasing contact time improved C2-C4 yields without increasing aromatics production, possibly due to its small pore size (shape selectivity). SAPO-34, SAPO-11, and Al-MCM-41 were not selective to light olefins at any studied contact time.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Review
Green & Sustainable Science & Technology
Jijiang Huang, Andrei Veksha, Wei Ping Chan, Apostolos Giannis, Grzegorz Lisak
Summary: Proper management of plastic waste is crucial to prevent its harmful environmental impacts, with emphasis on reuse, recovery, and recycling to minimize negative effects and promote optimization of plastic-based materials. Chemical recycling techniques with catalysts are being studied for efficient energy and material recovery, with a focus on the quality and yield of products and suggestions for catalyst design and process improvement for material circularity.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Environmental
Tianyue Su, Guo-Ping Lu, Kangkang Sun, Pengyu Wu, Chun Cai
Summary: A heterogeneous bimetallic FeNi catalyst has been developed for the selective catalytic pyrolysis of PLA to monomer. The optimal catalyst showed excellent performance with high lactide yield, which is significant for the circular utilization of biodegradable plastic wastes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Arkadi Maisels, Andreas Hiller, Franz-Georg Simon
Summary: Industrial-scale mechanical recycling of plastics has limitations in terms of technology and economics. Chemical recycling processes can convert plastics back to monomers or raw materials for the production of new plastic goods. However, the current capacities of chemical recycling plants are still low and their profitability is strongly affected by oil prices, with the profitability limit currently between $50 and $60 per barrel.
CHEMBIOENG REVIEWS
(2022)
Review
Engineering, Environmental
Peter Quicker, Mathias Seitz, Julia Vogel
Summary: Increased media coverage and import bans have made plastic waste one of the most discussed waste streams. Chemical recycling is receiving more attention as a way to open up new waste streams and provide valuable raw materials for the chemical industry. However, few chemical recycling plants are currently in continuous operation, and more scientific evidence is needed for a final evaluation of their ecological and economic benefits.
WASTE MANAGEMENT & RESEARCH
(2022)
Review
Energy & Fuels
K. Radhakrishnan, P. Senthil Kumar, Gayathri Rangasamy, L. Praveen Perumal, S. Sanaulla, S. Nilavendhan, V. Manivasagan, K. Saranya
Summary: Plastic production has increased globally, leading to the disposal of plastic waste in landfills or scattered, posing health and environmental risks. Converting plastic waste into fuels or other options is a more sustainable waste management approach than landfill dumping. Effective plastic waste disposal is crucial due to the long degradation time of plastic.
Article
Chemistry, Analytical
Eliane Lazzari, Marco Piparo, Charlotte Mase, Laurence Levacher, Pierre-Hugues Stefanuto, Jean-Francois Focant, Giorgia Purcaro, Pierre Giusti
Summary: Detailed chemical characterization of pyrolysis oils from plastics is crucial for understanding the recycling process. An analytical method combining GCxGC and PI-TOF MS was developed to accurately analyze the chemical composition of pyrolysis oils. This method allows for the differentiation of different compound classes and monitoring of contaminant removal processes. It is of great significance for the production of sustainable plastic pyrolysis oils.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Green & Sustainable Science & Technology
Waheed Zeb, Martijn Roosen, Pieter Knockaert, Sven Janssens, Daniel Withoeck, Marvin Kusenberg, Joel Hogie, Pieter Billen, Serge Tavernier, Kevin M. Van Geem, Steven De Meester
Summary: Valorisation of post-consumer plastic pyrolysis oil in steam crackers and their application as precursors to chemicals is hindered by the complexity of these oils, such as boiling range, fouling risk, and contaminations. Vacuum distillation effectively improved most properties of the distilled fractions, making it an essential downstream process step for the application of post-consumer plastic pyrolysis oils as feedstock in steam crackers and precursors to chemicals.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
T. R. Praveenkumar, Manigandan Sekar, Raghavendra Rao Pasupuleti, Beata Gavurova, G. Arun Kumar, M. Vignesh Kumar
Summary: Plastic waste treatment is a key challenge faced by many countries. Recycling of municipal plastic waste for energy recovery is a key movement in reducing accumulation, and this review covers the exposure and energy recovery methods of plastic consumption. The aim of this review is to understand the conversion of plastic waste into value added products and the consequences of handling municipal plastic waste and e-waste, as well as the impact of PAHs contamination on human health effects.
Review
Environmental Sciences
Rahul Tiwari, Numanuddin Azad, Deblina Dutta, Bholu Ram Yadav, Sunil Kumar
Summary: Plastic waste is on the rise due to urbanisation and globalization, with India being one of the top producers. Only a small percentage of plastic produced in India is recycled. This study explores mechanical and chemical recycling methods, as well as less carbon-intensive plastic degrading strategies using biodegradation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Environmental Sciences
N. Sakthipriya
Summary: The contemporary world is facing challenges from increasing plastic waste due to economic and population growth. Recycling is the best solution to reduce the use of fossil fuels and move towards a circular economy. The type and hierarchy of waste provide a basis for choosing proper waste recycling policies. Pyrolysis offers a valuable way to convert plastic waste into useful products and serves as a sustainable alternative to incineration and landfilling. This study provides an overview of plastic pyrolysis technology and its role in achieving a circular economy.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Niklas Netsch, Jonas Vogt, Frank Richter, Grazyna Straczewski, Gerd Mannebach, Volker Fraaije, Salar Tavakkol, Shahram Mihan, Dieter Stapf
Summary: Catalytic pyrolysis of post-industrial and post-consumer waste was studied using two different zeolites and an amorphous silica-alumina catalyst in a pilot-scale auger-type reactor at temperatures of 400-550°C. Unlike thermal pyrolysis, high gaseous product yields of approximately 85 wt% with C2-C4 olefin contents up to 67 wt% were achieved with polyolefin-rich waste. Catalyst regeneration was proven to be feasible for maintaining the yield and composition of the gaseous product after deactivation by coke deposition. Waste feedstocks with significant nitrogen and halogen heteroatom content were found unsuitable for in-situ catalytic pyrolysis.
CHEMIE INGENIEUR TECHNIK
(2023)
Article
Environmental Sciences
Harish Jeswani, Christian Krueger, Manfred Russ, Maike Horlacher, Florian Antony, Simon Hann, Adisa Azapagic
Summary: The study compares the environmental impacts of chemical recycling through pyrolysis with other plastics waste management options and virgin plastics production. Results indicate that pyrolysis has lower climate change impact and life cycle energy use, but higher other impacts compared to mechanical recycling, energy recovery, and virgin plastics production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Chemistry, Multidisciplinary
Pallabi Sinha Roy, Gil Garnier, Florent Allais, Kei Saito
Summary: Plastic waste, a major source of pollution, can be effectively reduced through upcycling techniques to create high-value materials and mitigate the environmental impact and production costs.
Article
Engineering, Environmental
Onur Dogu, Andreas Eschenbacher, Robin John Varghese, Maarten Dobbelaere, Dagmar R. D'hooge, Paul H. M. Van Steenberge, Kevin M. Van Geem
Summary: This paper presents a new kinetic Monte Carlo model for studying the product yield variations of polystyrene pyrolysis. The model accurately predicts the yields of major products and reveals the contributions of different reaction pathways to product formation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Ioanna Tzortzi, Christos Xiouras, Chrysovalantis Tserpes, Andromachi Tzani, Anastasia Detsi, Tom Van Gerven, Georgios D. Stefanidis
Summary: This study investigates the effect of microwave heating on the synthesis and pretreatment steps of HEURs. The results show that microwaves can significantly reduce processing time and energy consumption. However, PEG pretreatment/dehydration by microwaves leads to faster degradation of PEG and should be avoided.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Engineering, Environmental
Eduardo Morais, Evangelos Delikonstantis, Marco Scapinello, Gregory Smith, Georgios D. Stefanidis, Annemie Bogaerts
Summary: We propose a zero-dimensional kinetic model to study the gas-phase dynamics of methane conversion in a nanosecond pulsed discharge plasma reactor. The model accurately captures the rapid changes in electric field, gas and electron temperature, and species densities. By validating against experimental data, we investigate the effects of gas temperature and reactor pressure on gas conversion and product selectivity. Furthermore, we analyze the important reaction pathways and the dynamics of the heating and cooling mechanisms. H radicals are identified as the most abundant plasma species, participating in hydrogenation and dehydrogenation reactions that mainly lead to the formation of C2H4 and C2H2 as products (depending on the pressure).
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Evangelos Delikonstantis, Ioannis Papaioannou, Kevin M. Van Geem, Georgios D. Stefanidis
Summary: Given the current energy crisis, it is crucial to manage and exploit decentralized natural gas resources cautiously. Presently, more than 120 billion cubic meters of natural gas are flared upstream. Mobile electrified mini-plants with state-of-the-art plasma reactors show potential for addressing this issue. This study demonstrates the technical and economic feasibility of a mobile and electrified process for offshore conversion of wasted natural gas into C2 species (olefins), considering offshore processing constraints and cost estimation.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Chemistry, Applied
Wenxin Liang, Li Ding, Ke Guo, Yang Liu, Xiaoxia Wen, Jacob Judas Kain Kirkensgaard, Bekzod Khakimov, Kasper Enemark-Rasmussen, Kim Henrik Hebelstrup, Klaus Herburger, Xingxun Liu, Staffan Persson, Andreas Blennow, Yuyue Zhong
Summary: This study investigated the multi-scale structural dynamics of amylopectin-only barley starch (APBS), normal barley starch (NBS), and amylose-only barley starch (AMBS) during enzymatic digestion. Rapid digestion stages followed by slow digestion stages were identified for all starches. During the rapid digestion stage, the content of short chains and the thickness of crystalline and amorphous nano-lamellae increased, while crystallinity decreased. The slow digestion stage was characterized by changes in branching degree, crystallinity, and structure loss.
FOOD HYDROCOLLOIDS
(2023)
Article
Energy & Fuels
Emil O. Lidman Olsson, Daniel Schmid, Oskar Karlstrom, Kasper Enemark-Rasmussen, Henrik Leion, Songgeng Li, Peter Glarborg, Kim Dam-Johansen, Hao Wu
Summary: Biomass can be converted into heat, power, and biofuels through thermal conversion processes, but the presence of phosphorus in certain types of biomass can lead to operational or environmental issues when released. The mechanisms behind phosphorus release and high-temperature phosphorus chemistry need to be understood in order to efficiently recover phosphorus from biomass residues. This study investigated the release of phosphorus from wheat bran char and sunflower seed char under various gas environments and temperatures.
Article
Chemistry, Analytical
Oguzhan Akin, Robin John Varghese, Andreas Eschenbacher, Jogchum Oenema, Mehrdad Seifali Abbas-Abadi, Georgios D. Stefanidis, Kevin M. Van Geem
Summary: The effect of vapor-catalyst contact time and catalyst properties on the recovery of light olefins (C2-C4) from post-consumer mixed polyolefinic waste pyrolysis vapors was studied using five different solid acid catalysts. HZSM-5 with Si/Al ratio of 11 and 27 showed the highest light olefins yields at a very short contact time, while longer contact time decreased olefin yields and increased aromatics production. HZSM-22 was not effective in cracking pyrolysis vapors to C2-C4 olefins at a short contact time, but increasing contact time improved C2-C4 yields without increasing aromatics production, possibly due to its small pore size (shape selectivity). SAPO-34, SAPO-11, and Al-MCM-41 were not selective to light olefins at any studied contact time.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Engineering, Chemical
Fabio Cameli, Panagiotis Dimitrakellis, Georgios D. Stefanidis, Dionisios G. Vlachos
Summary: Plasma-assisted conversion of ethane can produce value-added chemical building blocks. The selectivity of ethylene production is primarily determined by ethane conversion, and is not affected by the dielectric properties of the packed bed material, packing material size, supplied power, and ethane concentration. Particle size mainly affects conversion due to pressure alterations. Pd/SiO2 catalyst can change the selectivity by favoring saturated species.
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2023)
Review
Thermodynamics
Mehrdad Seifali Abbas-Abadi, Yannick Ureel, Andreas Eschenbacher, Florence H. Vermeire, Robin John Varghese, Jogchum Oenema, Georgios D. Stefanidis, Kevin M. Van Geem
Summary: Is full recyclability of polyolefins via chemical recycling a dream, or can it become a reality? The main problem in recycling plastic waste is its complexity and the need for large investments in sorting and purifying solutions. Novel chemical recycling processes can offer solutions to overcome these challenges and achieve higher value products. Thermal pyrolysis and catalytic pyrolysis have shown promise in this regard, but further research is needed to optimize the process and improve the purification and catalyst stability.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2023)
Article
Engineering, Environmental
Evangelos Delikonstantis, Panagiotis Vettas, Fabio Cameli, Marco Scapinello, Anton Nikiforov, Guy B. Marin, Kevin M. Van Geem, Georgios D. Stefanidis
Summary: The conversion of CO2 in steel mill off-gases to syngas using nanosecond pulsed discharges at atmospheric pressure is an effective way to reduce the environmental impact of the steelmaking process. Experimental results show that CO2 conversion is affected by H2 excess, interelectrode distance, and specific energy input (SEI). It is recommended to use a stoichiometric H2:CO2 feed ratio for higher energy efficiency.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Ioanna Tzortzi, Christos Xiouras, Chrysi Choustoulaki, Andromachi Tzani, Anastasia Detsi, Guillaume Michaud, Tom Van Gerven, Georgios D. D. Stefanidis
Summary: In this work, the synthesis processes of hydrophobically modified ethoxylated urethanes (HEURs) were investigated. It was found that the two-step method allows for higher molecular weight polymers with less toxic diisocyanates compared to the conventional one-step method. The addition timepoint of the end-capping agent can be tailored to achieve HEURs with a wide range of molecular weight and polydispersity index. Efficient end-capping of high molecular weight polymers remains a challenge and alternative mixing technologies should be considered.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Acoustics
Ariana Bampouli, Quinten Goris, Jonas Van Olmen, Serkan Solmaz, Mohammed Noorul Hussain, Georgios D. Stefanidis, Tom Van Gerven
Summary: In this work, the effect of viscosity on ultrasound field was investigated experimentally and numerically by sonication of mixtures with increasing viscosity using an ultrasonic horn at 30 kHz. The study qualitatively and semiquantitatively examined the impact of higher viscosity on acoustic pressure distribution using sonochemiluminescence and quantified acoustic streaming effects using Particle Image Velocimetry (PIV). A numerical model was developed to predict cavitationally active zones, considering both thermoviscous and cavitation based attenuation. The results showed two cavitation zones and a decrease in intensity with increasing viscosity. The findings have important implications for the design and modeling of horn based sonochemical reactors.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Applied
Yu Tian, Xingxun Liu, Jacob Judas Kain Kirkensgaard, Bekzod Khakimov, Kasper Enemark-Rasmussen, Kim Henrik Hebelstrup, Andreas Blennow, Yuyue Zhong
Summary: The study analyzed the multi-scale structure and thermal properties of eight different types of high-amylose starches and found that the degree of molecular branching and the extent of the granule V-type crystalline polymorph were critical factors determining their thermal properties. The findings are potentially useful for the development of high-amylose starch-based products and new high-amylose crops.
FOOD HYDROCOLLOIDS
(2024)
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
