Article
Environmental Sciences
Jia-Hong Kuo, Chiou-Liang Lin, Chang-Yu Ho, Jia-Chi Hung
Summary: The study found that a temperature of 900 degrees C in both stages resulted in the highest H2 content in syngas, and an ER of 0.3 led to the highest H2 content in syngas. Additionally, a particle size of 0.46 mm and gas velocity of 1.5 U/U-mf increased heavy metal concentrations in the bed material.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Thermodynamics
Janitha C. Bandara, Rajan Jaiswal, Henrik K. Nielsen, Britt M. E. Moldestad, Marianne S. Eikeland
Summary: Gasification is an attractive method for biomass-to-energy conversion and fluidized bed design is considered one of the best options for large-scale operation. The study found that as the temperature increases, carbon conversion rate improves, but nitrogen dilution at high temperatures may counteract the carbon conversion to a certain extent.
Article
Thermodynamics
Si Woo Han, Jeong Jae Lee, Diyar Tokmurzin, Seok Hyeong Lee, Ji Young Nam, Sung Jin Park, Ho Won Ra, Tae-Young Mun, Sang Jun Yoon, Sung Min Yoon, Ji Hong Moon, Jae Goo Lee, Young-Min Kim, Young Woo Rhee, Myung Won Seo
Summary: The study investigated the air gasification properties of SRF with high content of residual mixed waste plastic in a lab scale bubbling fluidized bed gasifier. The results showed that gas yield increases and tar yield decreases as the operating temperature and air-to-fuel equivalence ratio (ER) increases, with changes in the concentration of various gases in the gas product. The H2/CO ratio increases with rising temperature and decreases with rising ER, while carbon conversion efficiency (CCE) and cold gas efficiency peak at 800 degrees C and ER of 0.25.
Article
Green & Sustainable Science & Technology
Sung Jin Park, Seong Hye Son, Jin Woo Kook, Ho Won Ra, Sang Jun Yoon, Tae-Young Mun, Ji Hong Moon, Sung Min Yoon, Jae Ho Kim, Yong Ku Kim, Jae Goo Lee, Do-Yong Lee, Myung Won Seo
Summary: Converting rice husk into energy through gasification is a promising method for generating renewable energy and reducing greenhouse gas emissions. Research has shown that under specific gasification conditions, tar in the produced gas can be efficiently removed and used to drive gas engines.
Article
Energy & Fuels
Ramesh Timsina, Rajan Kumar Thapa, Emilie Moldestad, Rajan Jaiswal, Ashish Bhattarai, Mladen Jecmenica, Marianne Sorflaten Eikeland
Summary: Biomass gasification is a promising technology for producing versatile product gases, and the choice of a fluidized bed gasifier is suitable for large-scale industrial operations. Characterizing different feedstocks is crucial for achieving acceptable efficiency in specific applications. This study experimentally characterized two feedstocks (wood and grass pellets) using a 20-kW pilot-scale bubbling fluidized bed gasifier. The carbon conversion for grass pellets was lower compared to wood pellets, and frequent agglomerations were observed at temperatures above 800 degrees C. Wood pellet gasification achieved a carbon conversion of approximately 60% at around 850 degrees C.
Article
Engineering, Chemical
Nicolas Torres Brauer, Marcos Navarro Salazar, Hugo de Lasa
Summary: This article proposes a new PPPM to describe bubble properties in a lab scale fluidized bed. The PPPM is based on a balance of forces and predicts bubble rise velocity as a function of the bubble axial chord. By comparing it against 46,000 bubbles, it is shown that 91% of the bubbles fall within the PPPM prediction band. This model is expected to significantly contribute to the development of large-scale biomass gasifier models.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
Francis O. Olanrewaju, Gordon E. Andrews, Hu Li, Herodotos N. Phylaktou, Bintu G. Mustafa, Miss H. Mat Kiah
Summary: Sweet sorghum is a crop grown commercially in Nigeria that has high bio-waste energy in its stalk. This study aimed to optimize the gasification of sweet sorghum stalk residue to maximize the yield of combustible gases. The research found that at the optimum conditions, the hot gas efficiency was 81%.
Article
Chemistry, Multidisciplinary
Maryem Dhrioua, Kaouther Ghachem, Walid Hassen, Ahmed Ghazy, Lioua Kolsi, Mohamed Naceur Borjini
Summary: This study presents a multistage gasification system for producing syngas with low tar content. The investigation focuses on Prosopis Juliflora gasification, analyzing chemical reactions and tar treatment. The results show that specific conditions lead to higher gas production and lower tar content.
Review
Energy & Fuels
Hengjun Gai, Peiyi Yang, Qiang Zhang, Mengqi Lin, Hongbing Song, Meng Xiao, Tingting Huang, Quanhong Zhu
Summary: Circulating fluidized bed reactors are widely used in the energy industry for gas-solid reactions. They can be classified into two categories based on fluidization regimes: dilute-dense and dual-dense. The concept of dual-dense gas-solid circulating fluidization has not been well understood, hindering its commercial application. This review provides a detailed analysis of the dual-dense system, including mechanism, structural and operating parameters, particle circulation prediction, gas-solid flow simulation, and potential applications, while identifying existing controversies and unresolved issues.
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
Chemistry, Applied
C. Tsekos, M. del Grosso, W. de Jong
Summary: This study presents a novel 50 kWth indirectly heated bubbling fluidized bed steam reformer technology, with experiments conducted to identify its main characteristics, showing promise in the field of biomass allothermal gasification.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Energy & Fuels
Vanessa Ferreira de Almeida, Alberto Gomez-Barea, Susanna Nilsson, Sanna Tuomi
Summary: The gasification of refuse-derived fuel (RDF) in a fluidized bed gasifier followed by a high-temperature filter was investigated in a bench-scale plant. The influence of parameters like steam addition and bed material on gasification performance was studied, revealing the conversion of fuel-N and fuel-S into ammonia and H2S. The distribution of trace elements into filter and bottom ashes showed behavior consistent with their volatility.
Article
Engineering, Environmental
Susanna Nilsson, Alicia Ronda, Alberto Gomez-Barea
Summary: The use of alkaline residue from the acetylene industry as in-bed sorbent to remove H2S from syngas was investigated. The reaction rate was affected by the presence of CO2 and H2O in the gas mixture. The sulfidation rate of calcined CS was influenced by operating parameters and showed promising potential as an alternative to conventional sorbents.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Sirisha Parvathaneni, Sujay Karmakar, Vivek V. Buwa
Summary: Fluidized beds are widely used in chemical processing and power generation. This study investigated the influence of local hydrodynamics and bubbling characteristics on the performance of fluidized-bed reactors during coal gasification. The results showed that a well-mixed bed resulted in higher gasification efficiency and gas yield.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Review
Green & Sustainable Science & Technology
Naresh Hanchate, Sudha Ramani, C. S. Mathpati, Vishwanath H. Dalvi
Summary: Biomass gasification is a widely explored research area for synthetic gas production. Dual fluidized bed gasifiers are a recent technology capable of producing medium heating value syngas.
JOURNAL OF CLEANER PRODUCTION
(2021)
