Article
Chemistry, Applied
Ali Hedayati, Hamid Sefidari, Christoffer Boman, Nils Skoglund, Norbert Kienzl, Marcus Ohman
Summary: The study found that key ash-forming elements K and P in different types of agricultural biomass fuels are mainly present in the residual char and ash, with varying release characteristics at different stages. The highest releases were observed at the highest temperature studied.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Energy & Fuels
Dan Gall, Thomas Allguren, Jakob Johansson, Fredrik Normann, Anette Heijnesson Hulten, Adrian Gunnarsson, Klas Andersson
Summary: Research has shown that recirculation of scrubber effluent can effectively reduce nitrogen-containing compounds, decrease ammonia demand, increase deposition growth rate, and alter chemical composition of deposits.
Article
Thermodynamics
Hesameddin Fatehi, Mario Costa, Xue-Song Bai
Summary: This study investigates the interaction between different organic and inorganic K/S/Cl compounds in the solid structure of biomass and develops a model to predict the temporal release of various compounds during biomass devolatilization. Results show that KCl, HCl, and Kg are dominant species in the presence of chlorine, while Kg is the main potassium species released in the absence of chlorine. Additionally, KOH and K2SO4 are released towards the end of devolatilization, and SO2 is the main sulfur species released into the gas phase. The model is coupled with a CFD solver to further study the gas phase chemistry of the K/S/Cl system.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Thermodynamics
Muhammad Awais, Muhammad Mubashar Omar, Anjum Munir, Wei li, Muhammad Ajmal, Sajjad Hussain, Syed Amjad Ahmad, Amjad Ali
Summary: This study evaluated the effects of biomass ratios on gasification efficiency, reactor thermal profile, and specific yield of syngas composition and tar contents. The results suggested that the mixture of sugarcane bagasse + coconut shells was a suitable feedstock mixture for gasification.
Article
Thermodynamics
Wubin Weng, Marcus Alden, Zhongshan Li
Summary: Two-dimensional laser-induced photofragmentation fluorescence (LIPF) was used to visualize the vapor of potassium hydroxide (KOH) and potassium chloride (KCl) in the plume above burning wood and straw pellets. Different techniques were employed to measure the potassium concentration, elemental potassium concentration, and surface temperature during combustion. The results showed that the release of potassium species depended on the combustion stage and the composition of the fuel. Evaluating the importance and relevance of identifying the release behavior of potassium during biomass combustion is critical for understanding the formation of alkali-related problems and optimizing combustion processes.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Energy & Fuels
Siqin Li, Hao Song, Junhao Hu, Haiping Yang, Jun Zou, Youjian Zhu, Ziyue Tang, Hanping Chen
Summary: The study found that straw biomass with higher cellulose and hemicellulose content, such as corn straw, wheat straw, and rice straw, exhibited higher pyrolysis reactivity. In the char gasification stage, the content of fixed carbon and catalytic ash components played a significant role in determining weight loss and reactivity, with corn straw, cotton straw, and soybean straw performing better in char gasification. Kinetics results showed that the homogeneous reaction model better described the pyrolysis stage, while the shrinking core model was more suitable for the char gasification stage in all straw biomass.
Review
Energy & Fuels
Coskun Yildiz, Marcel Richter, Jochen Stroehle, Bernd Epple
Summary: The release behavior of sulfur and chlorine compounds from walnut shell particles was investigated using an entrained flow reactor. The experiments were conducted under different atmospheres and conditions. The results showed that the majority of fuel-bound sulfur volatilizes as sulfur dioxide, carbonyl sulfide, and hydrogen sulfide in nitrogen atmosphere at 1000 degrees C. Hydrogen chloride is released as HCl at a lower percentage. Similar results were observed in carbon dioxide atmosphere. The release of sulfur and chlorine decreases with increasing temperatures in both atmospheres.
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.
Review
Energy & Fuels
Shengyuan Guo, Zhimin Lu, Jinzheng Chen, Zhengyan Bao, Jianfeng Cai, Shunchun Yao
Summary: The effect of different biomass on char gasification was investigated. It was found that different feedstocks lead to different gasification reactivities of the char. However, when conversion is plotted against dimensionless temperature, all the experimental results can be described by one curve.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Review
Energy & Fuels
Marcia Borghetti, Oscar de Almeida Neuwald, Everton Hillig, Marcelo Godinho
Summary: This study compares the performance of biomass in its crude form and densified form in CO2 gasification processes, and suggests a promising application for densified biomass residues in thermochemical processes.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Multidisciplinary
Yimeng Zhang, Huanhuan Ma, Dengyu Chen, Jianbin Zhou
Summary: Biomass gasification polygeneration technology improves biomass utilization efficiency by preactivating gasified carbon, leading to production of high value-added activated carbon with clean heating. This technology also demonstrates significant environmental benefits and achieves negative CO2 emissions, while providing more economic benefits compared to coal and natural gas heating projects.
Article
Energy & Fuels
Zi-Meng He, Yu-Jie Deng, Jing-Pei Cao, Xiao-Yan Zhao
Summary: Co-gasification of biomass and coal has advantages in mitigating ash-related problems induced by potassium in biomass. However, the effect varies depending on the occurrence mode of inorganic K in biomass. The study found that K2CO3 and K2SO4 are mainly retained as KAlSiO4 and K2SO4 in the gasification ash. Co-gasification with coal can help mitigate bed agglomeration caused by K2CO3, K2SO4, and KCl in biomass.
Article
Energy & Fuels
Hongchang Xin, Jiawei Wu, Jiaxin Zhang, Sifan Chen, Huaqiang Pang, Juan Lv, Enchen Jiang, Zhifeng Hu
Summary: K is the most abundant trace metal in biomass, which has a dual effect on chemical looping gasification (CLG) by promoting performance and inhibiting oxygen carrier (OC) performance. This study investigates the dual effect of K on CLG performance under different K content, steam, K existence form, and thermo-kinetics analysis. The results show that K can significantly promote CLG performance at low K-addition and accelerate agglomeration at 12% K-addition. The addition of steam can utilize the promotion effect of CH3COOK and inhibit the formation of Fe2SiO4 and agglomeration.
Article
Green & Sustainable Science & Technology
Ali Habibollahzade, Pouria Ahmadi, Marc A. Rosen
Summary: The study found that by simulating biomass gasification process, it is possible to achieve high gasification efficiency with specific feedstocks under different gasifier conditions. Using the grey wolf optimization algorithm, the most suitable feedstock under different gasification agents was found to achieve optimal efficiency and minimal emissions.
JOURNAL OF CLEANER PRODUCTION
(2021)
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)