Article
Environmental Sciences
Qiang Cao, Le Sang, Jiacheng Tu, Yushi Xiao, Na Liu, Lidong Wu, Jisong Zhang
Summary: The use of a micro-packed bed reactor (mPBR) in a continuous ozonation system has shown significant improvements in the dissolution rate of ozone and the degradation of refractory organic pollutants. The efficiency of phenol and COD removal reached 100.0% and 86.4% respectively under optimal conditions, demonstrating the promising potential of this approach. Moreover, the conversion of unreacted ozone to oxygen in the system also plays a positive role in promoting the healthy development of aquatic ecosystems.
Article
Environmental Sciences
Konstantina Tsigkou, Antonia Terpou, Laura Treu, Panagiotis G. Kougias, Michael Kornaros
Summary: The study focused on utilizing olive mill wastewater for efficient biogas production under thermophilic conditions, testing its performance and analyzing the microbial community. Results showed potential for further exploitation of olive mill wastewater for biogas production.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Energy & Fuels
Konstantina Tsigkou, Michael Kornaros
Summary: The study focuses on developing a high-rate thermophilic anaerobic digester for treating olive mill wastewater, converting it to biogas to remove organic load amounts and achieve stable treatment conditions. The system shows high potential and can valorize olive mill wastewater without the need for co-digestion.
Article
Engineering, Chemical
Jing Ma, Wei Wei, Guotong Qin, Lei Jiang, Ngie Hing Wong, Jaka Sunarso, Shaomin Liu
Summary: This study presents an efficient reactor design that integrates an electrocatalytic packed-bed reactor with a membrane for nitrate removal. The reactor system shows excellent nitrate removal and nitrogen selectivity, highlighting the potential for large-scale nitrate remediation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
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, Applied
Lucas Dal Magro, Joao Pedro S. Pessoa, Manuela P. Klein, Roberto Fernandez-Lafuente, Rafael C. Rodrigues
Summary: This study immobilized a commercial enzyme cocktail for fruit juice clarification on chitosan beads and found that despite low activity recovery after immobilization, the stability of the immobilized enzyme was greater than that of the free enzyme. The enzyme retained higher activity levels under extreme conditions, and the fluidized-bed reactor showed better juice clarification capacity compared to the packed-bed reactor.
Article
Chemistry, Multidisciplinary
Dayanni D. Bhagwandin, John H. Dunlap, Ly D. Tran, Alexander Reidell, Drake Austin, Amelia A. Putnam-Neeb, Morgan Loveday, Rahul Rao, Luke A. Baldwin, Nicholas R. Glavin
Summary: Flow systems allow for in-line synthesis and processing of organic materials, offering advantages in high-throughput and scalability. In this study, a highly crystalline TAPB-OHPDA covalent organic framework (COF) was directly crystallized under continuous flow conditions in just 30 minutes. BET surface analysis showed that high surface areas above 1700 m2 g-1 can be achieved in 2 hours, resulting in a processing time 36 times faster than most solvothermal methods. The findings provide foundational knowledge for COF syntheses under packed-bed flow conditions and demonstrate an opportunity to accelerate the formation and processing of highly crystalline COF materials.
Article
Chemistry, Physical
Rebecca Hollenbach, Delphine Muller, Andre Delavault, Christoph Syldatk
Summary: This study presents a novel concept of continuous enzymatic glycolipid production catalyzed by Novozyme 435®, using a biphasic aqueous-organic system for simultaneous solubilization of sugars and fatty acids. Productivity in the continuous process was higher compared to a batch one, with space-time yields of up to 1228 ± 65 mu mol/L/h.
Article
Engineering, Environmental
Thi-Kim-Quyen Vo, Soyeon Kang, Sun-A An, Han-Seung Kim
Summary: The study found that increasing hydraulic retention time and nitrate loading rate in upflow packed-bed bioreactors can enhance nitrate removal efficiency, but excessive nitrate loading can lead to nitrate accumulation. Enriching seed activated sludge can increase the proportion of Thiobacillus and Sulfurimonas, further improving nitrate removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Thermodynamics
Waqar Ahmad, Leteng Lin, Michael Strand
Summary: This study investigated the tar conversion using partial combustion technique, finding that temperature had insignificant effect on benzene conversion while an air fuel ratio of 0.3 resulted in higher conversion rates. Additionally, H-2 and CH4 had substantial inverse effects on benzene conversion.
Article
Engineering, Chemical
Piu Chawdhury, Sarita Bhanudas Rawool, M. Umamaheswara Rao, Ch. Subrahmanyam
Summary: A dielectric barrier discharge reactor was used as a non-thermal plasma source for nonoxidative conversion of methane at ambient condition. By introducing dielectric materials and catalyst support materials, the non-catalytic reaction mechanism was investigated. The results showed that the non-catalytic mode could activate the C-H bond to produce H2 and light hydrocarbons without oxidant or thermal energy.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Multidisciplinary Sciences
Swati Sambita Mohanty, Arvind Kumar
Summary: The study describes the aerobic biodegradation of Indanthrene Blue RS dye by a microbial consortium immobilized on corn-cob biochar in a continuous up-flow packed bed bioreactor. The bioreactor achieved a maximum removal efficiency of 90% for the dye, showing potential for treating textile wastewater containing anthraquinone-based dyes with optimized parameters. This method was effective in both biosorption and biodegradation processes, demonstrating its usefulness in detoxifying textile wastewater.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
J. A. Andersen, J. M. Christensen, M. ostberg, A. Bogaerts, A. D. Jensen
Summary: This study investigated the plasma-catalytic ammonia decomposition for producing hydrogen using a packed-bed dielectric barrier discharge reactor. The introduction of dielectric materials with certain dielectric constants improved the ammonia decomposition, with MgAl2O4 showing the highest conversion rate. Further studies are needed to optimize the efficiency of this technology.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Martin B. Ostergaard, Azeem B. Strunck, Mads K. Jorgensen, Vittorio Boffa
Summary: A new method for thermocatalytic degradation of dispersed oil using a thermocatalyst, Sr0.85Ce0.15FeO3 perovskite, is proposed, which utilizes the thermal energy in produced water. Experimental results show that higher perovskite concentrations lead to faster removal of oil, with initial removal being adsorption to the perovskite surface followed by catalytic degradation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
M. Umamaheswara Rao, K. V. S. S. Bhargavi, Giridhar Madras, Ch. Subrahmanyam
Summary: A coaxial dielectric barrier discharge (DBD) reactor was used for catalytic non-thermal plasma conversion of CO2. The role of basic oxides in activating weakly acidic CO2 was investigated by synthesizing MO/gamma-Al2O3 (M = Mg, Ca, Sr, and Ba) catalysts and integrating them with the DBD reactor. The integration of basic metal oxides with the non-thermal plasma reactor resulted in a higher CO2 conversion. The best conversion was achieved with SrO loaded gamma-Al2O3 at a power of 1.8 W, with a CO2 conversion of 12% and energy efficiency of 1.46 mmol kJ-1.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xiuru Bi, Nan Yao, Xu Meng, Mingxia Gou, Peiqing Zhao
Summary: MnCO3 was found to be an efficient heterogeneous catalyst for transesterification of alcohols with DMC, giving desired products under mild conditions. MnCO3 calcined at 300 degrees C showed significantly enhanced surface area and abundant weak acid sites, contributing to its superior catalytic performance in the transesterification process.
Article
Chemistry, Physical
Nan Yao, Xiuru Bi, Liping Zhang, Luyao Tao, Peiqing Zhao, Xu Meng, Xiang Liu
Summary: A series of sodium phosphotungstate modified manganese oxide octahedral molecular sieve catalysts were developed and shown to exhibit excellent catalytic activity and selectivity in the one-pot synthesis of quinazolines. The successful doping of tungsten ions into the OMS-2 framework and the synergistic effect of phosphotungstic acid and OMS-2 were believed to contribute to the superior performance. This research provides a new environmentally-friendly solution for synthesizing heterocyclic compounds.
MOLECULAR CATALYSIS
(2021)
Article
Engineering, Chemical
Liping Zhang, Xiuru Bi, Mingxia Gou, Mengling Sun, Luyao Tao, Gexin Chen, Xiang Liu, Xu Meng, Peiqing Zhao
Summary: Ce and Bi co-doped OMS-2 showed enhanced oxidation reactivity and recyclability for the degradation of acid red 73 due to its unique morphology and rich surface oxygen vacancies. Moreover, co-doping significantly lowered the apparent activation energy, improving the degradation process efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Applied
Mustafa Ulvi Gurbuz, Gokhan Elmaci, Yajun Zhang, Xu Meng, Ali Serol Erturk
Summary: The synthesis of Ni-ion doped Birnessite@Cryptomelane hybrid structure as a bifunctional efficient catalyst for the OER and dye pollutants degradation has shown promising results, exhibiting high efficiency and stability in both processes.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Junjie Zhou, Jiaying Yan, Xu Meng, Weifeng Chen, Jianfeng Guo, Xiang Liu
Summary: In this study, highly selective and heterogeneous CoxWy nanocomposites were designed and synthesized as robust catalysts for hydrogen production via the hydrolysis of sodium borohydride, showing high TOF values and good recyclability.
Article
Chemistry, Multidisciplinary
Wenxin Hou, Shuhui Wang, Xiuru Bi, Xu Meng, Peiqing Zhao, Xiang Liu
Summary: In this study, Mn catalysts were designed based on manganese oxide octahedral molecular sieve (OMS-2) supports to optimize catalytic activity for organic pollutant degradation. The results showed that the [PW]-OMS-2 exhibited the highest efficiency and stability in organic pollutant removal compared to [PW]/OMS-2 and OMS-2 itself.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Junjie Zhou, Ning Li, Jialu Shen, Xu Meng, Xiang Liu
Summary: This study developed a method for hydrogen generation using Pd/C as a catalyst in the methanolysis, ethanolysis, propanolysis, and butanolysis of B(2)pin(2). It was found that alcohols were the only hydrogen source, and the order of hydrogen evolution activation energy (Ea) for different alcohols matched their known order of acidities.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Junjie Zhou, Xu Meng, Jiaying Yan, Xiang Liu
Summary: By catalyzing the hydrolysis of dimethylamine-borane on MoS2 nanosheets, hydrogen evolution can be achieved more efficiently. Co/MoS2 is found to be more efficient in producing hydrogen, utilizing hydrogen atoms in water.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Environmental Sciences
Liping Zhang, Xiuru Bi, Zuo Wang, Ali Serol Erturk, Gokhan Elmaci, Haiyu Zhao, Peiqing Zhao, Xu Meng
Summary: In this study, a manganese oxide nanomaterial with abundant acid sites was synthesized, and the catalytic performance for the degradation of phthalate esters was tested. The catalyst showed high efficiency in degrading and mineralizing the organic pollutants, and it could be reused for multiple cycles. Moreover, the catalyzed advanced oxidation processes significantly reduced the developmental toxicity of the wastewater on zebrafish.
Article
Engineering, Environmental
Xiaopei Wang, Xiuru Bi, Nan Yao, Gokhan Elmaci, Ali Serol Erturk, Qianru Lv, Peiqing Zhao, Xu Meng
Summary: In this study, a Cu-Nd-OMS-2 catalyst was synthesized and demonstrated to efficiently degrade water-soluble parabens by converting the radical mechanism into a non-radical pathway. The results showed that singlet oxygen and mediated electron transfer played important roles in the removal of pollutants.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Weifeng Wang, Xiuru Bi, Tian Chai, Peiqing Zhao, Jun-Li Yang, Xu Meng
Summary: In this study, manganese oxide octahedral molecular sieve-modified zirconia nanocomposites were fabricated and their adsorption performance towards rutin was investigated. The results showed that manganese oxide modification significantly improved the textural properties of the nanocomposites. Moreover, the optimal adsorbent exhibited high adsorption rate and desorption rate, and could be reused for multiple times.
Article
Engineering, Environmental
Nan Yao, Xiaopei Wang, Zihan Yang, Peiqing Zhao, Xu Meng
Summary: In this study, polyvinyl chloride (PVC) plastics were transformed into microporous carbon materials using KOH as an activator. The optimized carbon material showed a high surface area and pore volume, and the carbonization process yielded aliphatic hydrocarbons and alcohols. The PVC-derived carbon materials exhibited excellent adsorption performance for removing tetracycline from water. This study provides a facile and environmentally friendly approach for valorizing PVC into adsorbents for wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zixuan Hao, Xiuru Bi, Xiaopei Wang, Xiang Liu, Xu Meng
Summary: A novel bimetallic doping strategy was developed for the synthesis of three-dimensional manganese oxide (Ce-Bi-OMS-2) with nanoprism structural morphology. The structural dimension, enhanced specific surface area, and rich surface oxygen vacancies contributed to the good catalytic performance. This study demonstrates the activation of O-2 over a 3D catalyst for the degradation of aqueous organic pollutants.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Chemistry, Multidisciplinary
Xiang Liu, Wenxin Hou, Xu Meng, Xiuru Bi, Haiyu Zhao, Zuo Wang, Didier Astruc
Summary: A new dual-decontamination strategy has been employed to synthesize graphitic carbon nanosheets (GCNs) for efficient tetracycline (TC) degradation. The main oxidation pathway for TC degradation appears to be surface-confined electron transfer, leading to a significant reduction in the biotoxicity of the degradation products.
ENVIRONMENTAL SCIENCE-NANO
(2021)
Article
Chemistry, Inorganic & Nuclear
Xiuru Bi, Luyao Tao, Nan Yao, Mingxia Gou, Gexin Chen, Xu Meng, Peiqing Zhao
Summary: In this study, a H3PO4 center dot 12WO(3)/OMS-2 nanocomposite catalyst was successfully prepared, leading to the synthesis of β-carbolines and 3,4-dihydro-β-carbolines by tuning reaction conditions. The catalyst exhibited excellent activity, high selectivity, and good stability, providing a practical pathway for flexible and controllable synthesis of novel compounds.
DALTON TRANSACTIONS
(2021)
