Article
Chemistry, Analytical
Artur Bieniek, Malgorzata Sieradzka, Wojciech Jerzak, Aneta Magdziarz
Summary: This study investigated the fast pyrolysis of agricultural biomass (oat and corn straw) in a drop-tube reactor through numerical calculations and experimental verification. The optimal operating parameters for the highest bio-oil production were determined.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Green & Sustainable Science & Technology
Artur Bieniek, Wojciech Jerzak, Marcin Gajek, Aneta Magdziarz
Summary: This study conducted 2D numerical calculations of fast pyrolysis with partial oxidation of pine and pine bark using a drop-tube reactor at 550 degrees C. Experimental verification was done through thermogravimetric analysis of the materials involved. The results showed that increasing oxygen content in the carrier gas led to a linear reduction in char content and a decrease in required energy for pyrolysis.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
D. A. Mortari, D. Perondi, G. B. Rossi, J. L. Bonato, M. Godinho, F. M. Pereira
Summary: Water leaching pretreatment effectively removes water-soluble inorganic constituents from RGP and significantly impacts the combustion efficiency of WLGP chars, leading to lower burnout efficiency and increased gas emissions.
Article
Thermodynamics
Bin Li, Mengge Song, Xing Xie, Juntao Wei, Deliang Xu, Kuan Ding, Yong Huang, Shu Zhang, Xun Hu, Shihong Zhang, Dongjing Liu
Summary: The effect of oxygen equivalence ratio (ER) on oxidative fast pyrolysis of pine sawdust was studied. Oxygen mainly oxidized the biochar, providing the largest contribution to heat demand during biomass pyrolysis for autothermal operation. The biochar yield decreased from 21.03 to 9.5 wt% with an increase in ER from 0 to 11.15%. The addition of oxygen altered the formation and distribution of bio-oil, leading to the consumption of light compounds and promotion of anhydrosugar formation.
Article
Thermodynamics
Jiaye Zhang, Chongming Chen, Ao Zhou, Zia Ur Rahman, Xuebin Wang, Dragoslava Stojiljkovic, Nebojsa Manic, Milan Vujanovic, Houzhang Tan
Summary: This study investigated the pyrolysis behavior of coal at elevated pressure using a pressurized drop tube furnace, revealing that pressure, atmosphere, and coal rank significantly affect volatile releasing and char evolution.
Article
Engineering, Chemical
Haoran Sun, Guirong Bao, Shiliang Yang, Jianhang Hu, Hua Wang
Summary: The numerical investigation of biomass fast pyrolysis in a draft tube spouted bed using a multiphase particle-in-cell model has been successfully validated. The influence of draft tube configuration on pyrolysis performance is studied, and the results show that the equipment of draft tube can prevent direct contact of particles and improve gas flux and heat transfer coefficient. The simulation results provide valuable insights for understanding gas-solid characteristics and optimizing the design of spouting apparatus.
Article
Chemistry, Analytical
Manuel Nunez Manzano, Arturo Gonzalez Quiroga, Patrice Perreault, Sepehr Madanikashani, Laurien A. Vandewalle, Guy B. Marin, Geraldine J. Heynderickx, Kevin M. Van Geem
Summary: The Gas-Solid Vortex Reactor (GSVR) is a new reactor technology for biomass fast pyrolysis, capable of achieving high bio-oil yields. Compared to conventional reactors, the GSVR can reduce secondary cracking reactions, improve heat transfer rates, and yield lower non-condensable gas. Experimental results demonstrate the great potential of the GSVR for enhancing bio-oil yields and selectivity.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Thermodynamics
Dongmei Bi, Ranran Kong, Shanjian Liu, Jianjie He, Haiquan Sun, Di Yao
Summary: Computational fluid dynamics and discrete element method were used to study the flow behavior of binary mixtures of heat carrier and biomass, revealing the significant effects of ceramic ball size and mass ratio on the flow behavior.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Chemical
Chaiwat Soanuch, Krittin Korkerd, Vishnu Pareek, Pornpote Piumsomboon, Benjapon Chalermsinsuwan
Summary: This study investigated the hydrodynamics of a downer reactor for biomass fast pyrolysis, with a focus on the effect of reactor geometry on the system. Using three-dimensional transient Eulerian-Eulerian simulations and the kinetic theory of granular flow, it was found that optimizing the cone position and reactor tapering can improve mixing and radial solid distribution, while maintaining an appropriate gas residence time for biomass fast pyrolysis.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Maurizio Troiano, Valeria Ianzito, Roberto Solimene, Elvis Tinashe Ganda, Piero Salatino
Summary: A one-dimensional model of a fluidized bed pyrolytic converter for biomass is presented in this paper. The fate of biomass and resulting char is modelled by considering elutriation, attrition, and bed drain/regeneration. The study focuses on the role of heterogeneous volatile-char secondary reactions and their importance in controlling char loading in the bed. The results highlight the significance of these reactions in reactor performance and provide guidelines for optimal design and control of fluidized bed pyrolyzers.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Thermodynamics
Ranran Kong, Dongmei Bi, Di Yao, Yuchun Zhang, Jianjie He, Jia Liu
Summary: The flow and heat transfer characteristics of heat carrier and biomass particles in a V-shaped down-tube reactor were studied using computational fluid dynamics-discrete element method (CFD-DEM) modeling. The effects of different mass ratios of heat carrier to biomass particles and heat carrier diameters on the temperature distribution, heating rate, and residence time of biomass particles in a reactor were compared. The results showed that the temperature in the reactor increased with the increase of the mass ratio. Increasing the heat carrier diameter had a significant influence on the residence time of the biomass particles.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Chemical
Sanaa Hafeez, Maarten Van Haute, Achilleas Constantinou, Sultan M. Al-Salem
Summary: A comprehensive process simulation was developed to study the pyrolysis of LLDPE in an FBR, with the focus on the pyrolytic oil and wax yields. The simulation showed a decrease in oil yield with increasing temperature, due to the vibration of the polymer matrix and absorbed thermal energy. A higher gas yield and negligible wax formation at 700 degrees C were observed, which is beneficial for controlling plastic waste. The simulation was validated with experimental data, showing less than 10% discrepancy.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Thermodynamics
Thuan Anh Vo, Hoang Vu Ly, Quoc Khanh Tran, Byeongwan Kwon, Seung-Soo Kim, Jinsoo Kim
Summary: Lumped-kinetic modeling and experiments were conducted on the co-pyrolysis of palm kernel cake and polystyrene in a closed-tubing reactor. The study showed that co-pyrolysis not only increased the quantity and quality of bio-oil products, but also demonstrated a synergistic effect in the blend. This approach effectively reduced the O and N contents in the bio-oil and increased the proportion of aromatic hydrocarbons.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Demin Wang, Zhaohui Chen, Changming Li, Deliang Wang, Yunjia Li, Hang Yang, Zhouen Liu, Jian Yu, Shiqiu Gao
Summary: The study developed an integrated reactor that combined rapid pyrolysis and in situ volatiles upgrading to produce high-quality tar from coal. Under optimized conditions, the tar yield and quality significantly improved, outperforming the results obtained from rapid pyrolysis alone.
Article
Engineering, Environmental
Ross Houston, Oluwafemi Oyedeji, Nourredine Abdoulmoumine
Summary: This study simulated the fast pyrolysis of switchgrass using computational fluid dynamics and discrete element method, revealing the impact of operational conditions on product yields. The reduction of secondary reaction schemes did not significantly affect the overall pyrolysis yields.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Paper & Wood
Chamseddine Guizani, Sanna Helisten, Joanna Witos, Herbert Sixta
Article
Energy & Fuels
Tchini Severin Tanoh, Amina Ait Oumeziane, Jerome Lemonon, Francisco Javier Escudero Sanz, Sylvain Salvador
Article
Materials Science, Paper & Wood
Chamseddine Guizani, Kaarlo Nieminen, Marja Rissanen, Sauli Larkiala, Michael Hummel, Herbert Sixta
Article
Biochemistry & Molecular Biology
Hilda Zahra, Daisuke Sawada, Chamseddine Guizani, Yibo Ma, Shogo Kumagai, Toshiaki Yoshioka, Herbert Sixta, Michael Hummel
Article
Materials Science, Paper & Wood
Chamseddine Guizani, Sanna Hellsten, Joanna Witos, Mikko Makela, Michael Hummel, Herbert Sixta
Article
Materials Science, Paper & Wood
Sherif Elsayed, Michael Hummel, Daisuke Sawada, Chamseddine Guizani, Marja Rissanen, Herbert Sixta
Summary: Lyocell fibers have gained attention for their sustainability and excellent mechanical properties, produced using dry-jet wet spinning process. NMMO and superbase-based ILs are commonly used solvents, offering high-quality regenerated cellulose fibers.
Article
Polymer Science
Chamseddine Guizani, Sauli Larkiala, Kaniz Moriam, Daisuke Sawada, Sherif Elsayed, Sami Rantasalo, Michael Hummel, Herbert Sixta
Summary: A novel spin bath design incorporating an ionic liquid showed excellent spinning performance for cellulose dopes, with potential to optimize the Ioncell (R) process. Single filament spinning in IL/H2O mixtures allowed for closed loop operation, and preserved fibers mechanical properties were achieved in a coagulation bath containing up to 30 wt% IL.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Sherif Elsayed, Sanna Hellsten, Chamseddine Guizani, Joanna Witos, Marja Rissanen, Antti H. Rantamaki, Pauliina Varis, Susanne K. Wiedmer, Herbert Sixta
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Chemistry, Applied
Mikaela Trogen, Nguyen-Duc Le, Daisuke Sawada, Chamseddine Guizani, Tainise Vergara Lourencon, Leena Pitkanen, Herbert Sixta, Riddhi Shah, Hugh O'Neill, Mikhail Balakshin, Nolene Byrne, Michael Hummel
Summary: Cellulose-lignin composite fibres were successfully spun from ionic liquid solutions with lignin concentrations of up to 50%. Comparing beech and spruce lignin, the higher stability and carbon content of spruce lignin resulted in higher carbon fiber yield. These composite fibres show great potential as precursors for carbon fiber production.
CARBOHYDRATE POLYMERS
(2021)
Correction
Chemistry, Multidisciplinary
Sherif Elsayed, Jussi Helminen, Sanna Helisten, Chamseddine Guizani, Joanna Witos, Marja Rissanen, Antti H. Rantamaki, Paulus Hyvari, Pauliina Varis, Susanne K. Wiedmer, Ilkka Kilpelainen, Herbert Sixta
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Engineering, Chemical
Oscar Sosa Sabogal, Sylvie Valin, Sebastien Thiery, Sylvain Salvador
Summary: A small-scale induction heated reactor (IHR) was developed for studying fast pyrolysis, which showed good reproducibility with results obtained in a pilot scale fluidized bed reactor (FBR), demonstrating differences in gas and tar composition attributed to secondary reactions influenced by higher heat transfer rates and bed material in FBR.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Chemistry, Applied
Tchini Severin Tanoh, Amina Ait Oumeziane, Jerome Lemonon, Francisco Javier Escudero-Sanz, Sylvain Salvador
Summary: The study focuses on the non-catalytic process of green waste and wood gasification to produce high-quality nitrogen-free syngas. Results indicate that higher reaction temperatures and longer gas residence times can improve the conversion efficiency of biomass.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Manel Nasfi, Marion Carrier, Sylvain Salvador
Summary: Commercial analytical pyrolysis systems are widely used in biomass fast pyrolysis research, but the experimental conditions free from heat transfer limitations have not been verified. Numerical simulations were conducted in this study to analyze the time-temperature history and heat transfer coefficients of biomass samples in micro-rectors, confirming the pyrolysis regime. The study provides a method to evaluate the kinetics of biomass fast pyrolysis.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Engineering, Environmental
Oscar Sosa Sabogal, Sylvie Valin, Sebastien Thiery, Sylvain Salvador
Summary: The study investigates the thermochemical conversion of Solid Recovered Fuel (SRF) and selected model materials through fast pyrolysis experiments, aiming to elucidate the relationship between waste-derived fuels' initial components and the resulting reaction products.
Article
Engineering, Chemical
Sherif Elsayed, Benjamin Viard, Chamseddine Guizani, Sanna Hellsten, Joanna Witos, Herbert Sixta
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
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.