Article
Thermodynamics
D. T. Pio, L. C. M. Ruivo, L. A. C. Tarelho, J. R. Frade, E. Kantarelis, K. Engvall
Summary: This study investigated the tar concentration in the producer gas from direct gasification of residual forest biomass from eucalyptus, and found that the tar concentration decreased significantly with increasing gasifier operation time.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Maria Cortazar, Jon Alvarez, Gartzen Lopez, Maider Amutio, Maite Artetxe, Javier Bilbao, Martin Olazar
Summary: The combination of delocalized units for biomass pyrolysis and centralized units for bio-oil gasification is an economically attractive option for full-scale syngas production. The study focuses on validating a bio-oil feeding device and assessing the effect of gasification temperature on gas properties and conversion efficiency. The results show that increasing temperature promotes tar reduction, carbon conversion efficiency, and gas yield.
Article
Agricultural Engineering
Yuan Liu, Shiliang Wu, Huiyan Zhang, Rui Xiao
Summary: Combining torrefaction with fast pyrolysis is a feasible method for producing long-chain ether precursors. Structural characterization results showed that torrefaction led to a decrease in crystallinity index and the elimination of hydroxyls, ether bonds, etc., but an increase in carbonyls. The production of small-molecule gases was reduced after torrefaction, while the yield of targeted compounds in bio-oil significantly improved, with 240CS providing the highest carbon yield.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
Yunlei Cui, Yaning Zhang, Longfei Cui, Qingang Xiong, Ehab Mostafa
Summary: Conversion of plastic wastes into value added fuels is a good way for sustainable development. In this study, microwave-assisted fluidized bed reactor pyrolysis of polypropylene plastic for pyrolysis gas production was experimentally investigated. The effects of pyrolysis temperature, fluidizing velocity, and microwave power on the pyrolysis gas products were analyzed. An optimal pyrolysis gas yield of 76.1 wt% was obtained when the pyrolysis temperature was 900°C, fluidizing velocity was 2.36 x 10-3 m/s and microwave power was 800 W, and the pyrolysis gas was rich in C3H6, CH4, and C3H8 with a higher heating value of 51.8 MJ/m3. The produced gas has great potentials in applications, such as fuel cells.
Article
Thermodynamics
Enara Fernandez, Laura Santamaria, Maider Amutio, Maite Artetxe, Aitor Arregi, Gartzen Lopez, Javier Bilbao, Martin Olazar
Summary: The steam pyrolysis of pinewood sawdust yielded high bio-oil production potential, with increased gas and decreased liquid and char yields as temperature rose. The composition of the liquid fraction was significantly influenced by temperature, with varying components.
Article
Thermodynamics
Abrar Inayat, Lisandra Rocha-Meneses, Chaouki Ghenai, Mohamed Abdallah, Abdallah Shanableh, Khadija Al-Ali, Amna Alghfeli, Reem Alsuwaidi
Summary: This study investigates the potential of using plastic waste and date seeds for co-pyrolysis to produce bio-oil. Experimental results show that adjusting the temperature and plastic ratio can enhance the bio-oil yield and reduce the bio-char content. Therefore, co-pyrolysis of plastic waste and date seeds can be a sustainable biofuel production method in the UAE.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Agricultural Engineering
Bijan Hejazi
Summary: In this study, a novel heat integration alternative for biomass gasification is proposed, which involves cooling the syngas to near-ambient temperature using an indirect water condenser. A one-dimensional kinetic model is developed and validated against experimental data to demonstrate the feasibility of the proposed approach. The study also shows that increasing the bio-oil recycle ratio can improve water conversion and chemical efficiency at the expense of carbon conversion and thermal efficiency.
BIOMASS & BIOENERGY
(2022)
Article
Agricultural Engineering
S. Y. Huang, C. Y. Chen, W. Y. Hsu, A. N. Huang, H. P. Kuo
Summary: The Eulerian multiphase approach is used to investigate a rice husk fluidized bed pyrolyzer with a minimum fluidization velocity of 0.1 m/s. A four-phase modeling is adopted to account for the different hydrodynamic behavior of freshly fed biomass and pyrolyzed product char. The results show the independent motion of the char phase and the lowest position that light char can reach is determined by the biomass entrance position. Computational economic global kinetic model provides good char yield prediction at a fluidizing velocity of 0.3 m/s, with a deviation of 0.27% from experimental result.
BIOMASS & BIOENERGY
(2023)
Article
Chemistry, Applied
Luis Reyes, Lokmane Abdelouahed, Balkydia Campusano, Jean-Christophe Buvat, Bechara Taouk
Summary: By using the same experimental set-up with varying operating conditions, the study on beech wood gasification showed that temperature increase had a negative influence on exergy destruction. It was found that pyrolysis reaction destroyed more exergy than gasification under the same conditions, and steam gasification had a lower exergy destruction rate compared to CO2 gasification when biochar was used as bed material for tar cracking.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Zheng-hao Yang, Zhen He, Xiang-gang Zhang, Xia Jiang, Zi-heng Jin, Jian-ping Li, Liang Ma, Hua-lin Wang, Yu-long Chang
Summary: The circulating fluidized bed (CFB) reactor, commonly used in biomass fast pyrolysis, faces challenges in separating biochar from the heat carrier. To address this, a novel in-situ gas flow bed separator was designed, enabling efficient separation of biochar and the heat carrier. The separation efficiency was studied under different operational conditions, revealing the significant influence of bubble activity and the density and size disparities of binary particles. With the optimal conditions, a separation efficiency of 99% was achieved. This innovative technology holds great potential for enhancing product yields and competitiveness in fast pyrolysis applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Henok Atile Kibret, Yu-Lin Kuo, Ting-Yu Ke, Yao-Hsuan Tseng
Summary: Coffee, the second popular drink and traded item globally, generates significant solid waste during preparation. The high carbon content and calorific value of SCG make it a potential alternative fuel source. This study explored the thermochemical conversion of SCG in a semi-fluidized bed reactor with different gasification mediums, showing promising results in terms of carbon conversion and gas efficiency.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(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, Environmental
Enara Fernandez, Maider Amutio, Maite Artetxe, Aitor Arregi, Laura Santamaria, Gartzen Lopez, Javier Bilbao, Martin Olazar
Summary: The fixed bed reactor showed higher initial conversion and H-2 yield in the steam reforming of biomass fast pyrolysis volatiles, leading to lower catalyst deactivation compared to the fluidized bed reactor.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
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
Lukas Stanger, Alexander Schirrer, Florian Benedikt, Alexander Bartik, Stefan Jankovic, Stefan Muller, Martin Kozek
Summary: Dual fluidized bed steam gasification enables the production of valuable gas from woody biomass or biogenic residuals. Advanced control concepts, like model predictive control, are promising for improving process performance and efficiency. This paper presents a gray-box modeling approach, incorporating data-driven components, to obtain a mathematical description of temperatures and mass flows in the reactors. Artificial neural networks are used to model bed material circulation. Experimental data from a pilot plant validate the model's predictions for the dual fluidized bed gasification process.
Article
Green & Sustainable Science & Technology
Katarzyna Jagodzinska, Ilman Nuran Zaini, Rikard Svanberg, Weihong Yang, Par Goran Jonsson
Summary: This study focuses on the pyrolysis of refuse-derived fuel from excavated waste, identifying different compounds formed at various temperature ranges and highlighting the risks to be considered in the future utilization of these products.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Devy Kartika Ratnasari, Anton Bijl, Weihong Yang, Par Goran Jonsson
Article
Thermodynamics
Ilman Nuran Zaini, Yamid Gomez-Rueda, Cristina Garcia Lopez, Devy Kartika Ratnasari, Lieve Helsen, Thomas Pretz, Par Goran Jonsson, Weihong Yang
Article
Energy & Fuels
Yuming Wen, Shule Wang, Wangzhong Mu, Weihong Yang, Par G. Jonsson
Article
Chemistry, Analytical
Xincheng Lu, Tong Han, Jianchun Jiang, Kang Sun, Yunjuan Sun, Weihong Yang
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2020)
Article
Agricultural Engineering
Yamid Gomez-Rueda, Ilman Nuran Zaini, Weihong Yang, Lieve Helsen
BIOMASS & BIOENERGY
(2020)
Article
Chemistry, Analytical
Xincheng Lu, Jianchun Jiang, Kang Sun, Yunjuan Sun, Weihong Yang
Summary: The study found that aqueous phase bio-oil (APBO) obtained from hydrothermal treatment combined with pyrolysis of biomass has high antioxidant activity, which is influenced by its chemical composition. Phenolic compounds have a promoting effect on antioxidant activity, while acids have an inhibitory effect, and the substituent structure of phenols also plays a role in antioxidant activity.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Energy & Fuels
Shule Wang, Per Mandfloen, Par Jonsson, Weihong Yang
Summary: Anaerobic digestion is a practical process for recovering energy and materials from sewage sludge, but the land disposal of the derived digestate causes environmental problems. Copyrolysis of sewage sludge digestate and lignocellulosic biomass can produce high-quality oil and biochar. This study investigates the copyrolysis behavior using bench-scale experiments and finds that the interaction between feedstocks can enhance the quality and energy yield of the liquid biofuel.
Article
Environmental Sciences
Yuming Wen, Zhaoran Zheng, Shule Wang, Tong Han, Weihong Yang, Par Goran Jonsson
Summary: A series of magnetic bio-activated carbon (MBAC) has been produced from lignin and ferrous salts through processes such as impregnation, carbonization, and steam activation. The MBAC produced via wet impregnation method with higher steam flow rate showed higher iron content and better dispersion of iron species. The MBAC with the highest maximum phosphorus adsorption capacity demonstrated good potential for domestic wastewater treatment by removing up to 96.97% of total phosphorus from treated domestic wastewater.
Article
Thermodynamics
Yuming Wen, Ilman Nuran Zaini, Shule Wang, Wangzhong Mu, Par Goran Jonsson, Weihong Yang
Summary: This study investigates the pyrolysis of cardboard and polyethylene (PE) as well as their co-pyrolysis using thermogravimetric analysis, finding that the co-pyrolysis can promote the decomposition of cardboard and influence the heat absorption and reaction peak of PE. The research deepens the understanding of the synergistic effect of co-pyrolysis of cardboard and PE, supporting the potential application of pyrolysis of MSW.
Article
Green & Sustainable Science & Technology
Shule Wang, Yuming Wen, Henry Hammarstrom, Par Goran Jonsson, Weihong Yang
Summary: The study found that the hydrothermal carbonization of paper mill sludge (PPMS) resulted in a higher average activation energy for pyrolysis, and the concentration of monocyclic aromatic hydrocarbons in the organic liquid fraction increased with the pyrolysis temperature. The highest yield and highest heating value of the organic liquid fraction were achieved at 550 degrees Celsius, and the pyrolytic chars showed potential for use as a carbon sink.
Article
Green & Sustainable Science & Technology
Christian Aragon-Briceno, Artur Pozarlik, Eddy Bramer, Gerrit Brem, Shule Wang, Yuming Wen, Weihong Yang, Halina Pawlak-Kruczek, Lukasz Niedzwiecki, Agnieszka Urbanowska, Krzysztof Moscicki, Michal Ploszczyca
Summary: Anaerobic digestion is an efficient method for utilizing wet municipal solid waste (MSW) to produce biogas. This study focused on the determination of optimum hydrothermal carbonization (HTC) process conditions to recover water from MSW digestate. Results showed that HTC treatment increased water recovery during the dewatering process compared with the original feedstock. A process model was built, demonstrating a positive energy balance and electrical efficiency.
Article
Thermodynamics
Shule Wang, Hanmin Yang, Ziyi Shi, Ilman Nuran Zaini, Yuming Wen, Jianchun Jiang, Par Goron Jonsson, Weihong Yang
Summary: This study proposes a carbon-negative process for producing high purity hydrogen from organic waste, and evaluates its feasibility in Sweden. The process combines anaerobic digestion, pyrolysis, catalytic reforming, water-gas shift, and pressure swing adsorption technologies. Under optimal operating conditions, the process can produce 72.2 kg H2 and 701.47 kg negative CO2 equivalent emissions from 1 ton of dry organic waste. The techno-economic assessment shows that implementing the process in Stockholm can achieve an internal rate of return of 26% and a discounted payback period of 4.3 years when negative CO2 equivalent emissions are recognized as income.
Article
Chemistry, Multidisciplinary
Devy K. Ratnasari, Weihong Yang, Par G. Jonsson
Article
Engineering, Environmental
Panagiotis Evangelopoulos, Henry Persson, Efthymios Kantarelis, Weihong Yang
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2020)
