Article
Energy & Fuels
Wenran Gao, Mingming Zhang, Hongwei Wu
Summary: This study investigates bed agglomeration during fast pyrolysis of bio-oil derived fuels in a fluidized-bed reactor and reveals the positive effects of methanol and biochar in reducing tar formation. The results show a positive linear correlation between agglomeration yield and tar formation, indicating the significant impact of tar formation on bed agglomeration of bio-oil derived fuels.
Article
Chemistry, Multidisciplinary
Quoc Khanh Tran, Manh Linh Le, Hoang Vu Ly, Hee Chul Woo, Jinsoo Kim, Seung-Soo Kim
Summary: The kinetic parameters of biomass pyrolysis from Pitch Pine were studied, showing that the optimal temperature for bio-oil yield was 500 degrees Celsius with a maximum of 65.5%. The bio-oil had a high heating value ranging from 22MJ/kg to 24MJ/kg, and contained useful chemicals such as levoglucosan, furfural, and guaiacol. The pyrolyzed oil from Pitch Pine trees showed promise as a biofuel candidate due to the production of a significant amount of C-5-C-11 (gasoline fraction).
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Analytical
Fabio Leal Mendes, Andrea Rezende de Pinho, Marlon Brando Bezerra de Almeida, Elina Bastos Carama
Summary: The use of a circulating fluidised bed (CFB) reactor in biomass pyrolysis process promotes higher heat transfer and energy self-sufficiency. This paper studied two approaches to enhance the deoxygenation reactions of biomass components, namely cofeeding with hydrogen-rich compounds and using a ZSM-5 catalyst. Cofeeding methane or propane resulted in bio-oils with lower oxygen content compared to conventional pyrolysis. Propane achieved better performance in terms of hydrocarbon concentrations in bio-oils and increased BTX production.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Thermodynamics
Mohamed Ali Wahab, Katharina Kebelmann, Bernhard Schartel, Gareth Griffiths
Summary: This study explored anaerobic digestion and dark fermentation as green pre-treatments for seaweed biomass prior to pyrolysis. The biological pre-treatments significantly affected the composition and structure of the seaweeds, leading to changes in thermal degradation and volatile profiles during pyrolysis, with potential for generating biooil similar to petroleum-based composition.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Environmental
Hoang Vu Ly, Boreum Lee, Jae Wook Sim, Quoc Khanh Tran, Seung-Soo Kim, Jinsoo Kim, Boris Brigljevic, Hyun Tae Hwang, Hankwon Lim
Summary: The study focused on producing bio-oil from spent coffee waste through non-catalytic and catalytic fast pyrolysis, with a particular emphasis on comparative analysis of bio-oil quality and techno-economic analysis of scale-up systems. The results showed that dolomite and hematite had competitive unit production costs compared to conventional crude oil prices. Coupling laboratory-scale experimental results with scale-up modeling and economic analysis is crucial for practical feasibility studies in SCW pyrolysis for bio-oil production.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Mudasir Akbar Shah, N. S. Khan, Vimal Kumar, Ahsanulhaq Qurashi
Summary: Bio-yields obtained from pyrolysis of different types of walnut shells showed potential for use as fuel, lubricant, and value-added products after modifications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Changfa Zhang, Mengyan Yu, Xiangtong Li, Xueguang Li, Yang Liu, Yajie Jin, Jianjun Dai, Long Wang, Chunbao Zhou, Yingwen Zhang, Yanxin Yuan, Junshen Qu, Hejie Yu, Jie Fu, Chenglong Liu, Yan Li, Asif Ali Siyal
Summary: This study utilized fluidized bed pyrolyser (FBP) to recover and regenerate spent bleaching clay (SBC), and found the potential for upgrading it into green fuels and chemicals. The decolorization ability of pyrolysis chars (PCs) increased with pyrolysis temperature, and the heavy metal content in PCs was lower than the national standards, highlighting the significance of this technology.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Mengyan Yu, Changfa Zhang, Xiangtong Li, Yang Liu, Xueguang Li, Junshen Qu, Jianjun Dai, Chunbao Zhou, Yanxin Yuan, Yajie Jin, Yingwen Zhang, Jie Fu, Hejie Yu, Long Wang, Chenglong Liu, Yan Li
Summary: This study investigated the effect of temperature on soapstock pyrolysis and analyzed the characteristics of the resulting chars and pyrolysis oils. The results showed that the yield of chars decreased with increasing temperature, while the yield of pyrolysis oils reached a maximum at 600 degrees C. The composition of the chars changed with temperature, with carbon, hydrogen, and nitrogen decreasing, and sulfur tending to be retained. The pyrolysis oils were found to contain ketones, alcohols, and hydrocarbons, and higher temperatures promoted the production of short-chain alkanes and the conversion of alkenes to benzene derivatives. The study also identified three stages of soapstock pyrolysis and highlighted the role of calcium ions in the reaction. This study provides important insights for the thermochemical treatment of soapstock, leading to improved quality of pyrolysis oils and pollution control.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Energy & Fuels
Xiangxin Han, Yiru Huang, Xiaoye Wang, Yanwen Wang, Xiumin Jiang
Summary: Fluidized bed retorting of oil shale is a promising technology for high shale oil yield. This study focused on the effect of retorting temperature on product yield and composition distribution. Results showed that increasing retorting temperature led to higher shale oil yield, decreased shale char, and promoted cracking reactions of shale oil.
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
Chemistry, Analytical
Hairat Abduhani, Yalkunjan Tursun, Abulikemu Abulizi, Dilinuer Talifu, Xueli Huang
Summary: This study investigated the characteristics and kinetics of gas component releasing during oil shale pyrolysis, identifying two decomposition regions of OS and analyzing the formation kinetics of individual gas components. The activation energy values for H-2, CH4, and CO2 were calculated to be in specific ranges, showing significant variations in high temperature zones. The control step in the pyrolysis process was found to transition from surface chemical reaction control to joint control of reaction and diffusion with increasing temperature.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Analytical
Anubhuti Bhatnagar, Robert Barthen, Henrik Tolvanen, Jukka Konttinen
Summary: Bio-oil from crop residues is unstable due to reactive compounds and metals, hindering its use as a chemical feedstock. Different pyrolysis methods were tested on groundnut shells, with two-step pyrolysis at 340 degrees C and continuous heating producing the most stable bio-oil despite higher AAEM concentrations. Storage temperature and solvent addition further improved bio-oil stability, with minimal degradation observed after storage at 4 degrees C with methanol. This study contributes to the development of stepwise pyrolysis units for crop residue management.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(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
Energy & Fuels
Xiaozhuang Zhuang, Ziyu Gan, Dengyu Chen, Kehui Cen, Yuping Ba, Dongxia Jia
Summary: The quality and yield of bio-oil can be improved by co-pyrolysis of heavy bio-oil and bamboo pretreated by light bio-oil leaching. Under the optimal co-pyrolysis conditions, the highest yield and heating value of bio-oil were obtained. Furthermore, the relative contents of phenols and hydrocarbons increased while that of acids decreased in the bio-oil produced by copyrolysis. Predictive models for bio-oil yield and properties were established, providing a foundation for the preparation and utilization of bio-oils.
Article
Engineering, Chemical
Young Mi Chung
Summary: This study introduces a simple analytical model to predict the bed dimension of a continuous FBCVD process, suggesting that the diameter of an FBCVD column needs to be reduced to enhance conversion at a given production rate. To avoid linear expansion of column diameter upon scale-up, it is necessary to increase conversion or superficial velocity of the feed gas, resulting in an increase in bed height.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Thermodynamics
Hyung Woo Kim, Su Been Seo, Seo Yeong Kang, Eun Sol Go, Seung Seok Oh, YongWoon Lee, Won Yang, See Hoon Lee
Summary: This paper focuses on the design and modeling of an indirect S-CO2 cycle in an oxy-fuel circulating fluidized bed power plant. By reducing the temperature of the recirculated flue gas and analyzing the effect of water retention in the flue gas on overall net efficiency, the plant achieved higher net efficiency.
Article
Environmental Sciences
Soheil Valizadeh, Chang Hyun Ko, Jechan Lee, See Hoon Lee, Yeon Jeong Yu, Pau Loke Show, Gwang Hoon Rhee, Young-Kwon Park
Summary: This study demonstrates that pyrolysis of food waste using Ni-EG catalyst under CO2 atmosphere can lead to higher gas yield, lower condensable yield, and effective suppression of cyclic species in bio-oil. The simultaneous use of Ni-EG catalyst and CO2 contributes to altering the carbon distribution of pyrolytic products and provides a clean and high-quality source of energy.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Surendar Moogi, Seong-Ho Jang, Gwang Hoon Rhee, Chang Hyun Ko, Yong Jun Choi, See Hoon Lee, Pau Loke Show, Kun-Yi Andrew Lin, Young-Kwon Park
Summary: Food waste was converted to H-2-rich gas via catalytic steam gasification, and the effects of different basic oxides on the catalytic properties were studied. It was found that SrO significantly improved the gas yield and hydrogen selectivity of the catalyst, enhancing nickel concentration on the surface and reducing coke deposition during steam gasification.
Article
Chemistry, Physical
Soheil Valizadeh, Hanie Hakimian, Eui Hyun Cho, Chang Hyun Ko, See Hoon Lee, Gwang Hoon Rhee, Sang-Chul Jung, Kyung-Seun Yoo, Young-Kwon Park
Summary: The experiment on cow manure gasification under a CO2 atmosphere showed that using Ni-Al2O3 catalysts with highly loaded alkaline-earth metals can efficiently produce a significant amount of syngas, while yielding relatively low amounts of bio-oil and coke.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Maira Shabir, Nasir Shezad, Iqrash Shafiq, Ibrahim M. Maafa, Parveen Akhter, Kshaf Azam, Ashfaq Ahmed, See Hoon Lee, Young-Kwon Park, Murid Hussain
Summary: A visible-light active N,S-codoped TiO2 nanocomposite incorporated with carbon nanotubes (CNTs) was synthesized by a multicomponent heterojunction scheme, showing superior photocatalytic performance due to the synergistic effect of ternary components providing a high number of adsorption sites and facilitating effective separation of charge carriers. N,S-TiO2/CNTs exhibited around three times higher photocatalytic activity compared to binary composites and about four times higher than conventional TiO2. Furthermore, the nanocomposites were also investigated for their recyclability for five consecutive cycles.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Environmental Sciences
Jester Lih Jie Ling, Eun Sol Go, Young-Kwon Park, See Hoon Lee
Summary: Solar biomass hybridization is a promising energy technique that efficiently utilizes the benefits of biomass and solar energy while reducing their drawbacks. Integrating solar power with biomass systems can enhance efficiency and reduce greenhouse gas emissions.
Article
Thermodynamics
J. L. J. Ling, H. W. Kim, E. S. Go, S. S. Oh, H. J. Park, C. S. Jeong, S. H. Lee
Summary: The study proposed a power generation scheme integrating supercritical carbon dioxide cycle with biomass oxygen fuel circulating fluidized bed combustor to improve the power efficiency of waste biomass resources, specifically waste paper, waste wood, and cow manure. Through thermodynamic analysis and simulation comparison, the results showed that the proposed cycle could achieve higher net efficiency under specific excess oxygen ratio conditions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Su Been Seo, Eun Sol Go, Jester Lih Jie Ling, See Hoon Lee
Summary: The study evaluated the economic feasibility of a solar-assisted biomass gasification combined heat and power plant, showing that the solar-assisted biomass process had higher economic feasibility compared to a biomass-only process, and the additional income from carbon credit pricing played a significant role.
Article
Energy & Fuels
Su Been Seo, Hyungwoong Ahn, Eun Sol Go, Lih Jie Jester Ling, Nancy Julius Siambun, Young-Kwon Park, See Hoon Lee
Summary: This study investigates the use of solid particles as a medium for solar energy transport and storage. Experimental results show that silicon carbide has a higher solar thermal efficiency and increasing gas velocity decreases the temperature difference between the upper and lower beds. Additionally, increasing the average particle size reduces solid heat storage and increases gas heat storage.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Review
Agricultural Engineering
Jung Yoon Seo, Diyar Tokmurzin, Doyeon Lee, See Hoon Lee, Myung Won Seo, Young-Kwon Park
Summary: A sustainable carbon-neutral society requires the use of biochars and biofuels, with crop residues being a promising feedstock. This article presents the distribution and resource potential of major crop residues and discusses their application in biofuel production. It also proposes the challenges and opportunities for future research in terms of crop residue supply, biochar production, and biochar utilization for biofuel production.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Doyeon Lee, Hyungseok Nam, Myung Won Seo, See Hoon Lee, Diyar Tokmurzin, Shuang Wang, Young-Kwon Park
Summary: This review paper introduces various biomasses used in thermochemical conversion processes and analyzes the recent advances in catalytic thermochemical conversion technologies. It discusses the role of catalysts in different reactors on the major products and the catalytic reaction mechanisms during the thermochemical conversion reaction. It also reviews different types of reactors for each thermochemical process and introduces further processing technologies using biomass pyrolytic bio-oil products, as well as the related challenges and opportunities encountered in thermochemical conversion processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Eun Sol Go, Beom-Sik Kim, Jester Lih Jie Ling, Seung Seok Oh, Hyun Jun Park, See Hoon Lee
Summary: Gas and solid behaviors inside circulating fluidized bed (CFB) processes are mutually affected by operating conditions. Understanding these behaviors is essential for designing and operating CFB processes. This study investigated the gas and solid behaviors in a pilot-scale circulating fluidized bed combustor using computational particle fluid dynamics (CPFD) numerical simulation. The effects of fluidization number and parameters such as temperature, Ca/S molar ratio, and particle size distribution were analyzed. The study also suggested that direct and indirect desulfurization occur simultaneously under different operating conditions in CFB.
ENVIRONMENTAL RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Jester Lih Jie Ling, Seung Seok Oh, Hyun Jun Park, See Hoon Lee
Summary: In recent years, the utilization of biomass through advanced power technologies to achieve carbon neutrality has increased. A biomass combustor with a supercritical carbon dioxide cycle has been developed to compensate for the penalties of carbon capture and storage. The economic evaluation of the combustor, fueled by waste paper, waste wood, and cow manure, showed that waste paper is the most economically feasible fuel. Sensitivity analysis indicated that capital cost is the most influential factor, and both renewable energy certificate and carbon credit contribute to the economic feasibility of the system.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Review
Thermodynamics
Jester Lih Jie Ling, Won Yang, Han Saem Park, Ha Eun Lee, See Hoon Lee
Summary: Biomass oxygen fuel combustion as a viable approach for achieving carbon neutrality has gained attention. The complexity and versatility of biomass lead to different results within the typical operating temperature window. Temperature alone cannot comprehensively illustrate the reaction occurring during the process. By considering various factors, such as heat transfer, combustion, thermochemical kinetics, and gas flow rate, the performance of biomass combustion systems can be improved.
Article
Nanoscience & Nanotechnology
E. S. Go, H. W. Kim, S. Y. Kang, S. Keel, J. L. J. Ling, S. H. Lee
Summary: This study utilized CPFD analysis techniques to analyze the fluidization and reaction characteristics in an oxy-fuel circulating fluidized bed combustor, predicting flue gas compositions and demonstrating a typical CFB structure with CaSO4 particle formation.
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Chemistry, Analytical
Guanshuai Zhang, Shanjian Liu, Dongmei Bi, Zhisen He, Jia Liu, Yinjiao Liu
Summary: Hydrogen peroxide pretreatment was applied for fast pyrolysis of corn stalks, and it was found that the pretreatment effectively promoted lignin depolymerization and decreased the reaction activation energy. The pretreatment also increased the cellulose content and removed alkali and alkaline earth metals from the biomass. The pH of the hydrogen peroxide solution affected the removal of lignin and ash by the pretreatment, and the composition of bio-oil changed significantly, with a significant increase in the relative content of levoglucosan after pretreatment.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2024)
