Article
Thermodynamics
Zhijia Liu, Zixing Feng, Hongzhong Xiang, Jianfei Yang, Jian Zhang
Summary: The ash fusion characteristics of bamboo and coal co-firing process were found to have similar chemical compositions with coal ash, with bamboo increasing the ash fusion temperatures of blends. The recommended optimum blend ratio of bamboo and coal is 30%:70%. These results will provide scientific guidance for using bamboo residues for energy products.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Ao Zhou, Xuebin Wang, Aneta Magdziarz, Shilin Yu, Shuanghui Deng, Jin Bai, Qingfu Zhang, Houzhang Tan
Summary: Co-firing municipal sewage sludge (MSS) with coal in power plants can effectively treat the sludge, improve energy utilization efficiency, and benefit exhaust emissions. Experimental results show that the high iron content in MSS leads to lower ash melting temperatures compared to coal, and increasing the mixing ratio decreases the ash melting temperature of the mixed samples.
Article
Green & Sustainable Science & Technology
Markus Reinmoller, Marcus Schreiner, Marcel Laabs, Christoph Scharm, Zhitong Yao, Stefan Guhl, Manuela Neuroth, Bernd Meyer, Martin Graebner
Summary: The study investigates the ashing behavior of different types of biomasses and their potential use in thermochemical conversion processes. The ash composition and distribution are studied using X-ray fluorescence and scanning electron microscopy. X-ray diffraction is used to monitor the formation and transformation of mineral phases in the ashes. The experimental findings agree with the results of thermochemical calculations.
Article
Energy & Fuels
Markus Reinmoeller, Malgorzata Sieradzka, Marcel Laabs, Marcus Schreiner, Agata Mlonka-Medrala, Agnieszka Kopia, Bernd Meyer, Aneta Magdziarz
Summary: The study focused on investigating the thermal behavior and ash properties of biomasses, revealing similar behavior among different biomass samples; chemical analysis and scanning electron microscopy showed differences in the ash composition and heterogeneity in distribution; thermochemical calculations were consistent with ash fusion temperatures and behavior.
Article
Energy & Fuels
Markus Reinmoller, Lingxue Kong, Marcel Laabs, Zefeng Ge, Caroline Hommel, Massoud Massoudi Farid, Wenju Shi, Marcus Schreiner, Xi Cao, Stefan Guhl, Jin Bai, Bernd Meyer
Summary: In this study, the composition, mineral phases, and process-relevant properties of ashes were investigated using various experimental and modeling methods. Different analytical techniques were applied to analyze the chemical composition of ashes, study mineral phases using XRD, and investigate the ash fusion behavior. The results obtained from different methods were compared for validation and to extract additional information about gas phase transfer of selected ash components.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Energy & Fuels
Shuanghui Deng, Houzhang Tan, Bo Wei, Xuebin Wang, Fuxin Yang, Xiaohe Xiong
Summary: This study investigated the combustion characteristics of Zhundong coal, coal gangue, and their blends using thermogravimetric analysis and analytical instruments. The optimal blending ratio for better combustion performance was determined to be 30% coal gangue added into Zhundong coal. The results provide reference for burning blended high ash coal in a large pulverized Zhundong coal boiler for safety and economy.
Article
Thermodynamics
Peng Jiang, Yang Meng, Ashak Mahmud Parvez, Xin-yue Dong, Xin-yun Wu, Meng-xia Xu, Cheng Heng Pang, Cheng-gong Sun, Tao Wu
Summary: The combustion characteristics and ash fusion behaviours of Qinghai coal and Fushun oil shale, as well as their blends, were studied. It was found that the blends exhibited good combustion performance in terms of ignition and burnout indices, with combustion temperature having the most significant impact on thermogravimetric mass loss. The addition of oil shale was shown to mitigate slagging and fouling tendencies in Qinghai coal combustion.
Article
Thermodynamics
Dandan Chen, Changsheng Bu, Xinye Wang, Jubing Zhang, Nobusuke Kobayashi, Guilin Piao, Yong Jiang, Haoyu Feng, Yuhao Dou
Summary: The gasification/combustion kinetics of a typical Chinese high-ash-fusion-temperature (AFT) coal char, Huainan (HN) coal char, were analyzed in this study. Results showed that at 1300 degrees C, the gasification and combustion processes transitioned from the chemical reaction control zone to the pore diffusion control zone, providing useful data for designing non-slagging EFGs systems using high-AFT coals.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Yonghong Yan, Zhengkang Peng, Liutao Sun, Dengke Chen, Rui Sun
Summary: The influence of the blending ratio of pyrolyzed semi-char (SC) on the ignition, NO emission and burnout characteristics of lignite co-fired with SC was investigated. The results showed that the ignition characteristics of the blended fuel worsened with increasing SC blending ratio. The addition of SC to lignite delayed the appearance of a stable flame boundary and NO emissions were reduced mainly through heterogeneous reduction.
JOURNAL OF THERMAL SCIENCE
(2023)
Article
Energy & Fuels
Jiazhu Li, Juntao Wei, Markus Reinmoeller, Chen Liang, Shuangshuang Li, Ruirui Xiao, Jie Xu
Summary: This study investigates the flow behavior of biomass ashes at different temperatures and analyzes the formation and transformation of mineral phases in the ashes. The results show that the characteristic temperatures of the two ashes are slightly different, providing insights for the industrial application of high-temperature conversion processes.
Article
Green & Sustainable Science & Technology
Xiaoqing Lin, Tieying Mao, Zhiliang Chen, Jie Chen, Sheng Zhang, Xiaodong Li, Jianhua Yan
Summary: Thermal treatment is an effective method to detoxify municipal solid waste incineration fly ash and produce secondary materials for recycling. Co-treating fly ash with sewage sludge can reduce energy consumption and control heavy metals leaching, significantly lowering ash fusion temperatures and increasing removal efficiency of chlorine. This method also effectively solidifies heavy metals into minerals or aluminosilicates, meeting standards for construction material use in China.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Xin Wang, Weidong Fan, Jun Chen, Guanyu Feng, Xiang Zhang
Summary: Ammonia is considered as an alternative energy source with high utilization potential due to its carbon-free and hydrogen-rich properties. Ammonia/coal co-firing can effectively reduce CO2 emissions and control NO emissions, with a recommended co-firing ratio of 20-30% ammonia. Ammonia co-firing promotes coal gasification reactions, increases CO concentration, inhibits H2S release, and enhances the decomposition process.
Article
Energy & Fuels
Yuan Lv, Liang Xu, Yanqing Niu, Guangyao Wang, Yu Lei, Haiyu Huang, Shi'en Hui
Summary: Co-firing with coal can reduce the severe slagging during biomass combustion, but it results in higher deposition efficiency than in unblended coal/biomass combustion. The deposition efficiency showed a nonmonotonic downward trend as biomass fractions increased, with intensified sintering degree. Formation of Ca sulfates and Fe-AAEMs aluminosilicates during co-firing enriched Ca, S, Al, and Fe in deposits, promoting melt-induced agglomeration.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Green & Sustainable Science & Technology
Xuebin Wang, Hrvoje Mikulcic, Gaofeng Dai, Jiaye Zhang, Houzhang Tan, Milan Vujanovic
Summary: The study investigates the utilization of high-carbon-ash (HCA) as an alternative fuel for the cement industry. Experimental and numerical simulations were conducted, showing that no more than 30% of HCA should be burned in co-firing with coal in order to maintain the performance of the cement calciner furnace. This research demonstrates the potential for sustainable waste management of HCA and cleaner cement production through its use in the cement industry.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Chang'an Wang, Lin Zhao, Chengchang Liu, Xinyue Gao, Guangyu Li, Defu Che
Summary: The comparative study on ash characteristics of various high-alkali fuel shows that wheat straw has a large amount of potassium, while sodium is the main alkali in coals. The ashing procedure affects the phases of K-bearing mineral in WS ashes, Na-bearing and Ca-bearing minerals in LA coal ashes, Na-bearing, Ca-bearing, and Fe-bearing minerals in ZJ and TC coal ashes.
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.