Article
Chemistry, Multidisciplinary
Feifei Chen, Qin Wang, Linzhou Zhang, Qiushi Zhu
Summary: This study aims to investigate the interaction between functionalized graphene and metal porphyrins for a better understanding of the influence of N and O heteroatoms in asphaltene on demetallization efficiency during the solvent deasphalting process. The results show that the aminated/carboxylated side group has a strong inhibitory effect on the chemical adsorption of metal porphyrins.
Article
Environmental Sciences
Brian R. Pinkard, Shreyas Shetty, Derek Stritzinger, Christopher Bellona, Igor Novosselov
Summary: Effective technologies, such as supercritical water oxidation (SCWO), are needed for the destruction of PFAS. This study found that destruction and defluorination efficiencies of PFOS via SCWO were influenced by temperature and residence time, with a maximum 70.0% PFOS destruction and 78.2% defluorination achieved at 500 degrees C after 60 minutes of reaction.
Article
Biochemistry & Molecular Biology
Bjarte Aarmo Lund, Bjorn Olav Brandsdal
Summary: A new method was developed to efficiently determine the temperature dependence of enzyme catalysis, requiring less sample, labor, and time. The method was validated with Bacillus pumilus LipA enzyme and three different enzymes, effectively differentiating between enzyme types at various temperatures.
Review
Engineering, Chemical
M. A. J. S. van Boekel
Summary: The goal of kinetic modeling is to increase scientific understanding of the process under study and to predict product properties. The traditional two-step kinetic analysis method has its limitations, and a new workflow using nonlinear global regression on untransformed data is proposed in this article. The proposed method showed differences in parameter estimation compared to the classical two-step kinetic analysis, and demonstrated the advantages of multilevel modeling.
JOURNAL OF FOOD ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Abdulrahman Bin Jumah, Maryam Malekshahian, Aleksander A. Tedstone, Arthur A. Garforth
Summary: A kinetic model for LDPE hydrocracking was developed, estimating kinetic parameters and mass transfer coefficients from experimental data while considering mass transfer limitations and vapor-liquid equilibrium. The product stream was dominated by naphtha fractions, decreasing with longer reaction times.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Biotechnology & Applied Microbiology
M. Andreides, L. Pokorna-Krayzelova, J. Rihova Ambrozova, E. I. P. Volcke, J. Bartacek
Summary: Microaeration is commonly used in industry for removing hydrogen sulfide (H2S) from biogas, but achieving consistently high H2S removal in intermittently mixed reactors poses challenges. By assessing key parameters through experimentation and mathematical modeling, optimizing air/oxygen dosing and other factors can improve the effectiveness of this method.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Coatings & Films
Sudharshanaraj Thiruppathiraj, Seung-Min Ryu, Jiho Uh, Laxminarayan L. Raja
Summary: Atomic layer deposition (ALD) is now the preferred manufacturing process for modern microelectronics, with stringent process requirements dictating reactor design and parameter optimization. A particle-based direct-simulation Monte Carlo (DSMC) approach was used to simulate a multiwafer batch reactor for Si-based thin film deposition, showing nonuniformity of precursor species above the wafer surface within <1% for a given wafer and <2% across the entire multiwafer stack. The reactor was found to operate in the slip/transitional flow regime, highlighting the need for a high-Knudsen number DSMC approach.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)
Article
Biotechnology & Applied Microbiology
Ali Assadi, Roya Alimoradzadeh, Hossein Movahedyan, Mohammad Mehdi Amin
Summary: This study investigated the microbial and biodegradation kinetics of acclimated-mixed sludge to 4-chlorophenol in an aerobic sequencing batch reactor. The biodegradation kinetics were predicted accurately using the Haldane formulae. However, pure strains isolated from mixed sludge did not show higher 4-CP-removal efficiency due to the presence of an intermediate meta-cleavage product.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Thermodynamics
Yunan Chen, Lei Yi, Wenwen Wei, Hui Jin, Liejin Guo
Summary: The study on sewage sludge gasification in supercritical water found that temperature is the main factor affecting hydrogen yield, gasification efficiency, carbon gasification efficiency, and hydrogen yield potential. Additionally, the addition of mixed catalysts can promote reactions and the formation of hydrogen.
Article
Energy & Fuels
M. A. Coronel-Garcia, A. I. Reyes de la Torre, J. M. Dominguez-Esquivel, J. A. Melo-Banda, A. L. Martinez-Salazar
Summary: The kinetics of slurry phase heavy oil hydrocracking with nickel nanoparticles dispersed in PEG300 as the catalyst were studied. The reaction rate equation order was determined to be 2.5, and high residue conversion and selectivity towards naphtha were achieved. This study provides valuable insights for improving heavy oil hydrocracking processes.
Article
Energy & Fuels
Joris Claes, Arne Vancleef, Marleen Segers, Bert Brabants, Mumin Enis Leblebici, Simon Kuhn, Luc Moens, Leen C. J. Thomassen
Summary: The aminolysis reaction with heterogeneous feed and product was investigated. The optimal non-hazardous solvent was selected through batch reactor solvent screening. The highest yield obtained was 86.4%. The optimal reaction conditions were successfully applied in a pulsatile flow reactor, resulting in a product yield of 97%.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Chemistry, Physical
Roman Lyubimenko, Oscar I. Gutierrez Cardenas, Andrey Turshatov, Bryce S. Richards, Andrea Schaefer
Summary: The study demonstrates efficient degradation of steroid-hormone micropollutants through a photocatalytic membrane reactor, achieving significant removal of estradiol and estrone at environmentally relevant concentrations. This provides insights into solar-driven photocatalytic water treatment technologies for effective removal of micropollutants.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Computer Science, Interdisciplinary Applications
Saurabh Shivpuje, Manish Kumawat, Abhijit Chatterjee
Summary: FT-TPMD is a new variation of the TPMD algorithm that allows for easier implementation of TPMD calculations and shows improvements in computational efficiency. It also has the capability for systematic detection of rare transition events, state classification, and rate constant calculation.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Xinlong Xu, Xiaoming Zhang, Zhichong Kuang, Zhangxun Xia, Alexandre Rykov, Shansheng Yu, Junhu Wang, Suli Wang, Gongquan Sun
Summary: This study reveals the significant influence of the structure and structural evolution of FeN4 site in Fe-N-C catalysts on the activity and stability of oxygen reduction reaction. The key challenge lies in solving the demetallation issue.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Agricultural Engineering
Nicolas Ramirez, Claudia Ubilla, Javiera Campos, Francisca Valencia, Carla Aburto, Carlos Vera, Andres Illanes, Cecilia Guerrero
Summary: The study evaluated the effects of operational variables on lactulose production by enzymatic transgalactosylation in fed-batch and repeated fed-batch. Feed flowrate and fructose to lactose molar ratio were the most significant variables affecting lactulose yield, productivity, and selectivity. The repeated fed-batch operation increased efficiency of biocatalyst use and accumulated productivity significantly compared to batch and fed-batch operations with the same biocatalyst.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
Hideki Kanda, Rintaro Hoshino, Kazuya Murakami, Wahyudiono, Qingxin Zheng, Motonobu Goto
Article
Energy & Fuels
Qingxin Zheng, Yelin Zhang, Wahyudiono, Thierry Fouquet, Xi Zeng, Hideki Kanda, Motonobu Goto
Article
Engineering, Chemical
Motoki Yamada, Wahyudiono, Siti Machmudah, Hideki Kanda, Motonobu Goto
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2020)
Article
Chemistry, Multidisciplinary
Wahyudiono, Hiroki Kondo, Motoki Yamada, Noriharu Takada, Siti Machmudah, Hideki Kanda, Motonobu Goto
Article
Chemistry, Multidisciplinary
Siti Machmudah, Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto
Article
Multidisciplinary Sciences
Hideki Kanda, Wahyudiono, Motonobu Goto
Summary: By performing a large-scale molecular dynamics simulation, the Tolman length and interfacial tension of partially miscible symmetric binary LJ fluids were studied. It was found that two surfaces of tension exist in symmetric binary LJ fluids, and the temperature range and interaction epsilon(AB) affecting the partial mixing of the two fluids were clarified. The results show that the Tolman length increases and the interfacial tension decreases as the temperature or epsilon(AB) increases.
Article
Food Science & Technology
Hideki Kanda, Tsubasa Katsube, Wahyudiono, Motonobu Goto
Summary: A new method for preparing liposomes using liquefied DME was investigated in this study, which can avoid the toxicity and residue issues of conventional solvents, and is environmentally friendly and cost-effective.
Article
Food Science & Technology
Hideki Kanda, Yuji Fukuta, Wahyudiono, Motonobu Goto
Summary: This study aims to reduce operating pressure by combining liquefied dimethyl ether with supercritical carbon dioxide extraction to enhance neutral lipids extraction.
Article
Polymer Science
Li Zhu, Wanying Zhu, Xin Hu, Yingying Lin, Siti Machmudah, Wahyudiono, Hideki Kanda, Motonobu Goto
Summary: This study successfully prepared PVP electrospinning composites with uniformly distributed AgNPs and characterized the electrospun products using various methods.
Article
Polymer Science
Li Zhu, Siti Machmudah, wahayudiono, Hideki Kanda, Motonobu Goto
Summary: This study successfully fabricated electrospun TTO-PVP fibers with decreased content of toxic components using a self-made reduced-pressure electrospinning setup. The intense evaporation in the process led to morphology changes, allowing Terpinen-4-ol to remain in the fiber for a longer period. Furthermore, continuous environmental vacuum pumping during RP-ES proved the possibility for intense evaporation and continuous vapor removal.
Article
Materials Science, Multidisciplinary
Cinthya S. Castro Issasi, Kanae Mori, Rodolfo M. Ibarra, Mitsuru Sasaki, Armando T. Quitain, Tetsuya Kida, Satoko Okubayashi, Tomohiro Furusato
Summary: The synthesis of thermoresponsive polymers has been developed through various methods, with recent attention drawn to plasma-initiated polymerization methods like arc and streamer discharge. Pulsed arc discharge shows promise in producing polymers with specific characteristics for applications such as wound dressing. By changing the discharge conditions, different molecular sizes and weights, viscosities, and crystallinities can be achieved using this method.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Multidisciplinary Sciences
Mitsuru Sasaki, Yuji Miyagawa, Kouki Nonaka, Ryota Miyanomae, Armando T. Quitain, Tetsuya Kida, Motonobu Goto, Tetsuo Honma, Tomohiro Furusato, Kunio Kawamura
Summary: Traditional oligopeptide synthesis techniques are environmentally harmful, while hydrothermal media can be used for environmentally friendly synthesis with the issue of diketopiperazine formation. This study shows that efficient oligopeptide synthesis in aqueous medium can be achieved using nano-pulsed plasma.
Article
Chemistry, Applied
Mitsuru Sasaki, Hiras Tumegas Manalu, Ramma Kamogawa, Cinthya Soreli Castro Issasi, Armando T. Quitain, Tetsuya Kida
Summary: This study found that graphene oxide (GO) can be used as a catalyst to promote rutin hydrolysis under microwave irradiation, improving the reaction efficiency. Two different types of GOs were compared, and GO-TO showed higher catalytic performance. The highest rutin conversion (98.8%) and quercetin yield (81.9%) were achieved at 180 degrees C for 15 minutes using 3 mg of GO-TO and 2400 ppm of initial rutin concentration in 50 mL of water.
Review
Physics, Fluids & Plasmas
Wahyu Diono, Siti Machmudah, Hideki Kanda, Yaping Zhao, Motonobu Goto
Summary: The experiment demonstrated the use of high-voltage discharge plasma for water pollutant decomposition and nanoparticle synthesis in a high-pressure argon gas environment. Various factors were found to have a significant impact on the degradation reactions of organic compounds, and carbon solid materials, titanium dioxide, and titanium carbide nanoparticles were formed under high-pressure conditions. The process shows promise for advanced organic compound decomposition and metal-based nanoparticle synthesis technologies.
Article
Engineering, Multidisciplinary
Ni'am N. Fathonah, Tantular Nurtono, Kusdianto, Suci Madhania, Wahyudiono, Sugeng Winardi
INTERNATIONAL JOURNAL OF TECHNOLOGY
(2019)
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.