Article
Thermodynamics
Michael J. Greencorn, S. David Jackson, Justin S. J. Hargreaves, Souvik Datta, Manosh C. Paul
Summary: This study describes and models a new method for improving the efficiency of oxyfuel gasification in biomass energy with carbon capture and storage (BECCS) cycles using carbon dioxide recycled from exhaust gases. Thermodynamic simulations show that this process can increase the indicated efficiency of a representative cycle by up to 10.3% by reducing the oxygen requirements for the gasification reaction. The study also reveals the practical limit of exhaust recycling and the thermodynamic mechanisms contributing to the observed trends in overall cycle energy efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Biochemistry & Molecular Biology
Artem A. Medvedev, Alexander L. Kustov, Daria A. Beldova, Konstantin B. Kalmykov, Mikhail Yu. Mashkin, Anastasia A. Shesterkina, Sergey F. Dunaev, Leonid M. Kustov
Summary: This study aimed to investigate the influence of iron deposition conditions on the surface of hydrolytic lignin on the process of CO2-assisted conversion. The results showed that all prepared samples demonstrated higher conversion rates compared to pure lignin in the carbon dioxide-assisted conversion process.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Tao Wang, Xiangyang Liu, Jimin Xu, Waheed Afzal, Maogang He
Summary: This study investigated the gasification of softwood lignin in a supercritical carbon dioxide environment using platinum nanoparticles as catalysts. The results showed that the addition of catalyst increased the amount of CO2 cracking, the production of H-2 and CO molecules, and the reaction rate.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Multidisciplinary Sciences
Shuai Zhao, Youhong Sun, Xiaoshu Lue, Qiang Li
Summary: The use of carbon dioxide as a heat-carrying fluid can significantly increase the efficiency of oil shale pyrolysis and the release of volatile substances.
SCIENTIFIC REPORTS
(2021)
Article
Energy & Fuels
Juan C. Maya, Robert Macias, Carlos A. Gomez, Farid Chejne
Summary: A novel mathematical model for coal char gasification with CO2 was developed, considering non-uniform pore size distribution and various influencing factors. Critical parameters were found to be related to the microstructure of coal char and not significantly varied between different samples. As diffusional limitation increases, fragmentation occurs earlier in the reaction process due to the appearance of porosity gradients within the particle.
Article
Engineering, Chemical
Hui Xu, Bin Shi
Summary: Plastic products have superior performance and are widely used, but the current methods for recycling and processing waste plastics have limitations, leading to resource wasting and environmental pollution. This paper designs three different waste plastic gasification processes to achieve waste conversion, resource utilization, and carbon capture.
Article
Thermodynamics
Tianhang Zhang, Jianmin Gao, Yu Zhang, Jin Zhang, Qiaoqun Sun, Qian Du, Zhipei Tang, Yirui Peng
Summary: Compressed CO2 energy storage technology is a feasible solution to stabilize renewable energy fluctuation, and a new type of adsorption trans-critical compressed CO2 energy storage system offers high storage density. The system performance is affected by storage pressure, storage temperature, and improvements in heat exchanger effectiveness, compressor, and turbine isentropic efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Hao Chen, Yong Qin, Yanpeng Chen, Zhen Dong, Junjie Xue, Shanshan Chen, Mengyuan Zhang, Yufeng Zhao
Summary: This study investigates the effect of oxygen content in oxygen-enriched carbon dioxide gasification agents on gasification experiment results. The results show that as the oxygen content increases, the CO and H-2 in the combustible gas increase gradually, as does the calorific value. Although the product formation rate and gas production per unit mass of coal fluctuate, the coal consumption rate remains relatively stable.
Article
Chemistry, Physical
Abdul-Rashid Bawah, Rahima A. Lucky, Mohammad M. Hossain
Summary: The CO2 oxidative dehydrogenation of propane reaction can utilize carbon dioxide and propane to produce value-added chemicals, with optimal conditions found at specific feed ratios.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Valeria B. Lopez-Cervantes, Dae Won Kim, Juan L. Obeso, Eva Martinez-Ahumada, Yoarhy A. Amador-Sanchez, Eli Sanchez-Gonzalez, Carolina Leyva, Chang Seop Hong, Ilich A. Ibarra, Diego Solis-Ibarra
Summary: The MOF-type Ni-2(dobpdc) exhibits high chemical stability towards SO2, high capacity for low-pressure SO2 capture, and exceptional cycling performance. Fluorescence experiments demonstrate the remarkable SO2 detection selectivity of Ni-2(dobpdc). Time-resolved photoluminescence experiments provide a plausible mechanism of SO2 detection by this Ni(ii)-based MOF material.
Article
Thermodynamics
Adetunji Onigbajumo, Alireza Taghipour, Geoffrey Will, Thuy Chu Van, Sara Couperthwaite, Ted Steinberg, Thomas Rainey
Summary: The study found that increasing the SCWG gasification temperature can improve energy efficiency, carbon efficiency, and exergy efficiency, with Configuration III performing the best at suitable temperatures. By optimizing the power of the inlet water separator unit and reducing heat recovery, it is possible to increase utilizable exergy. Intrinsic exergy analysis can provide a more accurate assessment of the efficiency and performance of SCWG processes.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Yousaf Ayub, Shi Tao, Jingzheng Ren, Carman K. M. Lee, Chang He, Alessandro Manzardo
Summary: This research study developed a process simulation model of hydrothermal gasification (HTG) for converting poultry litter into value-added products. The effects of temperature, pressure, and biomass concentration on the quality of syngas and net heat steam were analyzed. The model showed better results at specific conditions, with a higher yield of hydrogen and methane gas and superior lower heating value. The HTG method was also found to be cost-effective, energy efficient, and environmentally friendly compared to direct land disposal.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Applied
Anna Trubetskaya, Andrew J. Hunt, Vitaliy L. Budarin, Thomas M. Attard, Jens Kling, Gerrit R. Surup, Mehrdad Arshadi, Kentaro Umeki
Summary: Supercritical carbon dioxide extraction is effective in generating soot particles with fullerene-like structure and increasing syngas yield. The high yields of extractives can lead to sustainable production of high-value chemicals and have significant potential in integrating extraction process into biorefinery.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Ruihan Dong, Shiliang Yang, Jianhang Hu, Fangjun Chen, Guirong Bao, Hua Wang
Summary: This study numerically investigates the gas-solid reactive flow in the biomass gasification of the fuel reactor in a chemical looping combustion system. The results show that the distribution of solid phase is non-uniform, the residence time of biomass is skewed, and the gas products exhibit a wide range of variations.
Article
Engineering, Chemical
Jingpeng Zhang, Bozhao Chu, Zhengwen Li, Binhang Yan
Summary: This study analyzed and optimized coal-based synthetic natural gas (SNG) processes with different coal ranks and gasification technologies, finding that low-rank coal combined with the Lurgi gasifier can improve energy conversion efficiency. Economic evaluation revealed that the process based on lignite has lower equipment investment.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Engineering, Environmental
Rajesh Ghosh, Avinash Sahu, S. Pushpavanam
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Mechanics
A. Choudhary, T. Renganathan, S. Pushpavanam
JOURNAL OF FLUID MECHANICS
(2019)
Article
Chemistry, Multidisciplinary
Krishna V. Kinhal, Shashwata Sinha, Aishwarya Ravisankar, Nirav P. Bhatt, Subramaniam Pushpavanam
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Mechanics
Akash Choudhary, Di Li, T. Renganathan, Xiangchun Xuan, S. Pushpavanam
JOURNAL OF FLUID MECHANICS
(2020)
Article
Mechanics
Akash Choudhary, T. Renganathan, S. Pushpavanam
JOURNAL OF FLUID MECHANICS
(2020)
Article
Engineering, Electrical & Electronic
T. Krishnaveni, T. Renganathan, S. Pushpavanam
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2020)
Article
Mechanics
Vignesh Thammanna Gurumurthy, S. Pushpavanam
Article
Engineering, Chemical
Chintala Tirupathinaidu, Nikhil Jain, T. Renganathan, S. Pushpavanam
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Mechanics
Prathmesh M. Vinze, Akash Choudhary, S. Pushpavanam
Summary: Janus particles self-propel by generating local tangential concentration gradients, driven by chemical asymmetry along their surfaces. Theoretical framework and parameter space distribution of Janus particle motion under externally imposed linear concentration gradients are studied.
Editorial Material
Physics, Fluids & Plasmas
Akash Choudhary, T. Renganathan, S. Pushpavanam
Summary: The article compares results from different studies and identifies discrepancies in the derived analytical expressions. By explaining the role of polymeric stress in viscoelastic flows and the correction of velocity field in inertial flows, the discrepancies are resolved.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Physics, Fluids & Plasmas
Prathmesh M. Vinze, S. Pushpavanam
Summary: Janus particles are artificial swimmers with catalyst coverage on their surface, generating a tangential chemical gradient for self-propulsion. The interaction of solute molecules with the particle surface leads to tangential pressure gradients and diffusio-osmotic flows. Using the Peclet number as a perturbation parameter, the study shows that solute advection reduces swimming velocity.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Chemistry, Multidisciplinary
Saranya Gopalakrishnan, R. Savitha, T. Renganathan, S. Pushpavanam
Summary: In this study, the adsorption of triclosan (TCS) on nylon66 membrane is investigated for the development of a preconcentration and sensing platform. The nylon66 membrane demonstrates excellent sorption ability, even for trace amounts of TCS (10 μg/L). XPS analysis reveals the formation of a hydrogen bond between the hydroxyl group of TCS and the amide group of nylon66. TCS shows preferential adsorption on the membrane due to its higher hydrophobic partition coefficient, replacing the water molecule.
Article
Engineering, Chemical
Vamsi Vikram Gande, Rangasamy Savitha, S. Pushpavanam
Summary: Continuous synthesis of metal nanoparticles using a biocompatible aqueous two-phase system (ATPS) is achieved through the use of a milli-channel to control capillary number, resulting in segmented flow. Chaotic advection-based mixing is exploited for the synthesis of silver nanoparticles in ATPS, which is separated at the interface. Various operating procedures are investigated in batch and continuous modes, and Van der Waals force is found to be responsible for trapping the nanoparticles at the interface. The continuous mode allows shape-controlled synthesis and eliminates the need for downstream particle separation, making it suitable for high-throughput nanoparticle production.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
K. Hima Nandini, Kurian Sinu, S. Pushpavanam
Summary: Gold nanoparticles (AuNPs) with biocompatibility and surface-functionalization have important diagnostic and therapeutic applications. However, the use of organic solvents in their synthesis limits their use in medicine. This study demonstrates the synthesis and separation of stable AuNPs in an aqueous two-phase system (ATPS) using polyethylene glycol (PEG) and trisodium citrate dihydrate (citrate). The self-assembly of nanoparticles at the fluid-fluid interface allows for their separation and characterization.
Article
Chemistry, Physical
Nithin Madhavan, Eswararao Yalla, S. Pushpavanam, T. Renganathan, Manas Mukherjee, Madivala G. Basavaraj
Summary: A versatile strategy for producing highly stable water in oil Pickering emulsions by direct contact condensation of steam is proposed in this study. The condensation of steam with a non-aqueous colloidal dispersion can produce emulsions in semi-batch and continuous modes of operation, with precise control over droplet size distribution achievable by adjusting parameters. The flexibility of continuous operation makes it a potential technique for large-scale emulsion production for various applications.
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)
