Article
Green & Sustainable Science & Technology
Witold Zukowski, Dawid Jankowski, Jerzy Baron, Jan Wrona
Summary: The study compared the combustion of selected artificial polymers and biomasses in a fluidized bed reactor, finding similar combustion times for packaging and construction materials, but longer times for polyvinyl chloride and polyamide. The combustion time of biomass particles depended on mass rather than type. The presence of radicals from liquefied petroleum gas combustion influenced carbon chain fragmentation, shortening polymer combustion times compared to tests without gaseous supporting fuel.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Matej Vodicka, Kristyna Michalikova, Jan Hrdlicka, Cornelia Hofbauer, Franz Winter, Pavel Skopec, Jitka Jenikova
Summary: This paper presents an experimental study on the feasibility of using different bed materials for oxy-fuel combustion of biomass in a bubbling fluidized bed. The results show that using lightweight ceramic aggregate can effectively control the combustion process, and ceramic materials are lighter with lower pressure drop, reducing the energy needed to drive the fluidization fan.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Witold Zukowski, Dawid Jankowski, Jan Wrona, Gabriela Berkowicz-Platek
Summary: This paper presents the results of combustion of polymers and biomass in a bubbling fluidized bed reactor. It was found that a minimum temperature of 850 degrees C is required for the combustion process. TG analysis coupled with FTIR analysis was used to simulate the chemical composition of bubbles in a hot fluidized bed. The study showed that a uniform access to oxygen is necessary for the combustion of complex gas mixtures. The combustion processes were conducted through autothermal burning and co-combustion with auxiliary fuel. The flue gases contained both inorganic and organic substances, with the latter mainly consisting of short-chain aliphatic hydrocarbons. The emission characteristics of gaseous products during the combustion of polymeric materials in the bubbling fluidized bed were investigated. Increasing the combustion temperature intensified the oxidation of fuel-bound nitrogen and the conversion of NO to N2 on the surface of the char. The obtained emission coefficients for different polymers will be valuable in determining the appropriate combustion method for alternative fuels.
Article
Energy & Fuels
O. Karlstroem, E. Vainio, M. Engblom, A. Brink, M. Hupa
Summary: This study investigates the effect of air staging on NOx reduction in an industrial bubbling fluidized bed and finds that air staging can significantly reduce NOx emissions in biomass combustion systems.
Article
Energy & Fuels
Pavel Skopec, Jan Hrdlicka, Matej Vodicka
Summary: The research results show that significantly higher SO2 capture efficiency can be achieved in oxyfuel conditions compared to air conditions. There are fundamental differences in SO2 capture between air and oxyfuel conditions in real combustion environments. The performance of the sorbent is important mainly at lower Ca/S molar ratios, and the difference in SO2 capture between sorbents decreases with increasing Ca/S ratio.
Article
Thermodynamics
Mengmeng Zhou, Shuai Wang, Kun Luo, Jianren Fan
Summary: In this study, the co-firing of biomass and coal in an oxy-fuel bubbling fluidized bed combustor was investigated using numerical simulations. The results revealed the effects of solid fuel injection and gas flow on gas-solid fluxes and gas product distributions.
Article
Energy & Fuels
Guillermo Martinez Castilla, Ruben M. Montanes, David Pallares, Filip Johnsson
Summary: The aim of this study is to investigate the dynamic performance of large-scale BFBC plants when accounting for both the gas and water-steam sides. A dynamic model of BFB-CHP plants is presented by connecting a model of the gas side to a process model of the water-steam side. The validation shows that the model can satisfactorily describe both multi-load steady-state operation and load transients. The simulation results highlight the fact that the water-steam side achieves stabilization more rapidly after changes in the DH line and steam delivered to customers, as compared to changes in the combustor load.
Article
Engineering, Environmental
Dali Kong, Kun Luo, Shuai Wang, Jiahui Yu, Jianren Fan
Summary: The study uses a particle-scale computational fluid dynamics-discrete element method to investigate biomass gasification in a bubbling fluidized bed reactor, exploring the effects of operating temperature and steam to biomass ratio on particle mixing and heat transfer modes. Increasing operating temperature and S/B ratio can enhance biomass mixing index and promote chemical reactions and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
C. J. McIntyre, R. W. Hughes, A. Macchi, P. Mehrani
Summary: The hydrodynamics of ilmenite particles in a high pressure cylindrical fluidized bed were modeled using the multiphase particle-in-cell approach. The model was validated against experimental data and showed good agreement for the minimum fluidization velocity at a close pack factor of 0.58. The model accurately represented the trends in bed expansion with fluidization ratio and pressure, but consistently underestimated the values. Bubble size distribution was also predicted by the model, with some deviation from experimental results. The importance of this study lies in its contribution to understanding the hydrodynamics of ilmenite particles in fluidized bed reactors.
Article
Multidisciplinary Sciences
Hoon Chae Park, Hang Seok Choi
Summary: Computational particle fluid dynamics was used to investigate the segregation characteristics of biochar in a bubbling fluidized bed. The study found that increasing the aspect ratio of the bed led to smaller bubbles and clearer segregation of biochar and sand particles.
SCIENTIFIC REPORTS
(2022)
Article
Energy & Fuels
Tanja Schneider, Jakob Krumrein, Dominik Mueller, Jurgen Karl
Summary: The application of oxygen carrier materials in combustion processes can help achieve CO2 sequestration and improve performance, especially in large-scale circulating fluidized beds. The ability to shift oxygen in space and time is crucial for combustion performance, especially in small-scale bubbling fluidized beds.
Article
Energy & Fuels
Mehmet Soner Yasar, Nevin Selcuk, Gorkem Kulah
Summary: A 1-D model for a BFBC co-firing lignite with cotton residue and limestone is coupled with a 3-D spectral and gray radiation models. The performance of the models is assessed by comparing their predictions with measurements from a BFBC. Comparisons between models with and without radiation show that the spectral model only slightly improves the predictions, due to the small temperature difference between the freeboard and walls and the dominance of combustion gases and particles in radiative heat transfer.
Article
Thermodynamics
M. Puig-Gamero, D. T. Pio, L. A. C. Tarelho, P. Sanchez, L. Sanchez-Silva
Summary: The direct gasification process of biomass in a bubbling fluidized bed reactor was simulated and validated using different models for pyrolysis, combustion, and reduction. The simulation results showed good agreement with experimental results, particularly for gases such as CO, CO2, H-2, CH4, and C2H4. However, the accuracy of H-2 gas prediction was found to be the lowest among the gases analyzed.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Son Ich Ngo, Young-Il Lim, Doyeon Lee, Myung Won Seo, Sungwon Kim
Summary: This study investigated the hydrodynamics, reaction kinetics, and heat transfer of a bench-scale bubbling fluidized bed reactor for CO2 methanation. The study successfully identified the effects of hydrodynamics and reaction kinetics on heat transfer coefficient in the reactor.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Antonio Soria-Verdugo, Eduardo Cano-Pleite, Alberto Passalacqua, Rodney O. Fox
Summary: The effect of biomass particle shape on the conversion of beech wood during pyrolysis in a bubbling fluidized bed was investigated. The experimental results demonstrated that the pyrolysis velocity of the particles was proportional to their characteristic heat transfer length. The pyrolysis time ranged from 43 to 85 s at 500°C and from 27 to 53 s at 600°C.
Article
Engineering, Chemical
Milene Costa Codolo, Waldir Antonio Bizzo
CHEMICAL ENGINEERING & TECHNOLOGY
(2016)
Article
Thermodynamics
Danilo Jose Carvalho, Joao Paulo Soto Veiga, Waldir Antonio Bizzo
Article
Thermodynamics
Luiz Augusto Badan Ribeiro, Robson Cristiano Martins, Juan Miguel Mesa-Perez, Waldir Antonio Bizzo
Article
Green & Sustainable Science & Technology
Valdelis Fernandes de Andrade, Waldir Antonio Bizzo
JOURNAL OF CLEANER PRODUCTION
(2019)
Article
Agricultural Engineering
Yesid Javier Rueda-Ordonez, Carlos Junior Arias-Hernandez, Julian Fernando Manrique-Pinto, Paola Gauthier-Maradei, Waldir Antonio Bizzo
BIORESOURCE TECHNOLOGY
(2019)
Article
Thermodynamics
Danilo Jose Carvalho, Ricardo Roquetto Moretti, Jorge Luiz Colodette, Waldir Antonio Bizzo
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Green & Sustainable Science & Technology
Paulo Cesar Lenco, Deyber Alexander Ramirez-Quintero, Waldir Antonio Bizzo
Article
Thermodynamics
Gabriel Pena-Vergara, Luis Roberto Castro, Carlos Alberto Gasparetto, Waldir Antonio Bizzo
Summary: Planted forests in Brazil play a significant role in energy generation, primarily through charcoal for the steel industry. Eucalyptus and pine are the main planted species, with Brazil having the world's highest productivity for planted forests. Analysis and utilization of forest residues are crucial for energy production.
Article
Agricultural Engineering
Deyber A. Ramirez-Quintero, Waldir A. Bizzo
Summary: This study characterized sugarcane bagasse, sugarcane straw, bamboo, and cassava plant branches regarding size and shape using sieving, elutriation, and image analysis. The size distribution and sphericity of biomass particles varied depending on the method used. Smaller biomass particles had higher ash content, while larger particles contained more minerals.
BIOMASS & BIOENERGY
(2023)
Article
Engineering, Electrical & Electronic
Agnes Nascimento Simoes, Danilo Jose Carvalho, Eugenio de Souza Morita, Haroldo Luiz Moretti, Helen Velozo Vendrameto, Li Fu, Floriano Torres, Andre Nunes de Souza, Waldir Antonio Bizzo, Talita Mazon
Summary: In this study, a low-cost and straightforward triboelectric nanogenerator (TENG) based on ZnO nanorods and PDMS:GO composites was proposed. Adding a steel spring into the TENG improved its generating output, achieving a power density of 246 mV M-2 and an output voltage of 4 V. The vibration frequencies of the transformer walls and the device's performance at these frequencies were analyzed and discussed.
Proceedings Paper
Engineering, Industrial
Agnes Nascimento Simoes, Danilo Jose Carvalho, Eugenio de Souza Morita, Helen Veloso Vendrameto, Li Fu, Floriano Torres, Andre Nunes de Souza, Waldir Antonio Bizzo, Talita Mazon
Summary: By adding a steel spring to the design of the triboelectric nanogenerator (TENG) and incorporating 4% weight GO into PDMS, the performance of the device was improved, resulting in a power density of approximately 246 mW m and an output voltage of 4 V at 60 Hz.
2021 14TH IEEE INTERNATIONAL CONFERENCE ON INDUSTRY APPLICATIONS (INDUSCON)
(2021)
Article
Materials Science, Multidisciplinary
Shakir Bin Mujib, Beatriz Vessalli, Waldir A. Bizzo, Talita Mazon, Gurpreet Singh
NANOMATERIALS AND ENERGY
(2020)
Proceedings Paper
Construction & Building Technology
Daniel Marcelo, Waldir Bizzo, Marcoantonio Alamo, Edilberto Vasquez
INTERNATIONAL CONFERENCE - ALTERNATIVE AND RENEWABLE ENERGY QUEST (AREQ 2017)
(2017)
Review
Agricultural Engineering
German Navarrete Cereijo, Pedro Curto-Risso, Waldir Antonio Bizzo
BIOMASS & BIOENERGY
(2017)
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)
