Article
Engineering, Environmental
Feiyue Gao, Chuncai Zhou, Jiao Du, Yulin Zhang, Wentao Wu, Guijian Liu, Da Li
Summary: Co-combustion of sewage sludge and coal is an effective way to generate energy and reduce environmental pollution. Oxy-fuel combustion technology improves energy efficiency and CO2 capture in power plants. The thermogravimetric analysis of co-combustion of sewage sludge and anthracite coal in different atmospheres revealed improvements in ignition and burnout performance by adding sewage sludge, as well as changes in properties with varying oxygen concentrations.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Shuai Guo, Jialiang Gao, Deng Zhao, Chenchen Zhao, Xingcan Li, Guangyu Li
Summary: This study investigates the effects of co-combustion of sewage sludge and coal on the emissions of NOx and SOx and the formation of ash. The results show that a higher sludge content can reduce SO2 emission and promote fusion of ash particles to alleviate slagging. The specific surface area of ash is negatively correlated with temperature. A reaction temperature of 900 degrees C and sludge content of 20 wt% are found to be optimal for pollutant emission control and ash agglomeration during co-combustion.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Pavel Skopec, Jan Hrdlicka, Matej Vodicka
Summary: This study investigates the effect of directly adding Ca-based sorbent for SO2 capture in a bubbling fluidized bed combustion, comparing the performance in air and oxy-fuel conditions. The results demonstrate a better SO2 capture ratio under oxy-fuel conditions.
Review
Energy & Fuels
Xin Wang, Jun Xu, Peng Ling, Xiaoxue An, Hengda Han, Yifeng Chen, Long Jiang, Yi Wang, Sheng Su, Song Hu, Jun Xiang
Summary: This study investigated the characteristics of sewage sludge and coal slime combustion, finding that co-combustion had a positive effect on desulfurization. Proper blend ratios and temperatures could effectively suppress the emission of SO2. The evolution of S functional groups showed different patterns during co-combustion. Calcium played an important role in the process, reacting with SO2 to form intermediate solid products and retaining SO2 in the ash.
Article
Energy & Fuels
Chang'an Wang, Yujie Hou, Qinqin Feng, Chaowei Wang, Xinyue Gao, Defu Che
Summary: The study investigates the co-combustion of ultra-low volatile carbon-based fuels (LVFs) and bituminous coal under oxy-fuel condition to reduce NOx emission and achieve CO2 capture. Results indicate that NOx emission increases as the fraction of bituminous coal decreases. The co-combustion characteristics are influenced by the oxidizing gas distribution method and fuel properties, and premixed combustion and in-furnace blending are effective in reducing NOx. It is recommended to maintain an O2 concentration of 27% to 30% during oxy-fuel combustion, while also reducing the secondary oxidizing gas flow in the semi-coke layers. This research contributes to the efficient and environmentally-friendly utilization of LVFs and enhances understanding of CO2 capture and carbon neutrality in electricity generation.
Article
Thermodynamics
Jiaye Zhang, Yu Zheng, Xuebin Wang, Gaofeng Dai, Houzhang Tan, Zia ur Rahman
Summary: This study systematically investigates the NO reduction behavior during pressurized oxy-coal combustion. The results show that combusting particles exhibit high reduction capacity at higher pressure and temperature, leading to a significant reduction in NO concentration in the furnace. Different coal types show variations in NO reduction efficiency at elevated pressure, and char has lower reduction activity compared to coal. Homogeneous reactions by volatile matter play a major role in NO reduction at higher pressure.
COMBUSTION AND FLAME
(2022)
Article
Environmental Sciences
Yanlin Wang, Li Jia, Baihe Guo, Xin Shen, Xin Zheng, Jun Xiang, Yan Jin
Summary: This paper investigates the co-combustion characteristics and NO/SO2 emission behavior of sewage sludge (SS) and coal slime (CS). The study reveals significant interactions between SS and CS during co-combustion and explores the mechanisms behind these interactions. The results demonstrate the influence of both non-catalytic factors and catalytic factors on the combustion characteristics, and the effect of co-combustion temperature and CS ratio on NO and SO2 emission characteristics. The findings also shed light on the reduction of NO facilitated by reducing gases released by SS combustion and the reduction of SS-NO by char formed by CS.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Energy & Fuels
Burak Ulusoy, Bozidar Anicic, Weigang Lin, Bona Lu, Wei Wang, Kim Dam-Johansen, Hao Wu
Summary: This study investigated the interactions in NOX chemistry during biomass co-combustion, finding that the effect varies with different biomass fuels and ash characteristics. The catalytic effect of ash on NO formation is influenced by ash preparation temperature and mixing with fuel. The impact of NH3 on NO depends on the stage of the co-combustion process, and NO emissions are reduced and the influence of ash on nitrogen chemistry is less pronounced under air staged conditions.
Article
Green & Sustainable Science & Technology
Xiaorui Liang, Qinhui Wang, Zhongyang Luo, Eric Eddings, Terry Ring, Simin Li, Peng Yu, Jiqing Yan, Xudong Yang, Xin Jia
Summary: The research found that under pressurized oxy-fuel combustion conditions, both an increase in system pressure and temperature led to a significant impact on NOx emissions, while an increase in oxygen concentration also resulted in an increase in NOx emissions. These results highlight the importance of understanding the impact of operating parameters on NOx emissions.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Tong Xu, Dikun Hong, Chunbo Wang, Yue Zhang, Yonghua Li
Summary: This study investigated the migration behavior and mechanism of nitrogen during the municipal sludge/coal co-pyrolysis using the ReaxFF MD method. The accuracy of this method was verified by comparing the individual pyrolysis properties of sludge and coal with experimental results. It was found that there was a negative synergistic effect on the release of nitrogen during the initial stage of co-pyrolysis, while a positive synergy related to the condensation of nitrogen-containing tar was observed during the secondary reaction stage. The study provides important insights into the behavior of nitrogen during sludge/coal co-pyrolysis.
Article
Chemistry, Applied
Haifeng Zan, Xiaoping Chen, Wenqi Zhong, Jiliang Ma, Daoyin Liu, Guoqing Lian, Pengfei Geng, Cai Liang
Summary: Pressurised circulating fluidized bed oxy-fuel combustion (PCFB-OFC) is a promising technology for CO2 capture due to its high carbon capture efficiency and net efficiency. However, there is a lack of comprehensive experimental studies on PCFB thermal state experimental devices. In this study, a 100 kWth PCFB-OFC experimental device was developed, and the effect of combustion pressure on various parameters was investigated. The results showed that increasing pressure improved combustion efficiency, temperature distribution, and reduced pollutant emissions.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Thermodynamics
Donghee Kim, Hyungjun Ahn, Won Yang, Kang Y. Huh, Youngjae Lee
Summary: This study investigated the combustion characteristics and NOx/SOx emissions at different pressures using a lab-scale pressurized oxy-fuel combustion system. Higher pressure resulted in increased heat recovery rate, lower combustion temperature, and higher heat flow rate with higher H2O content in flue gas. NOx and SOx emissions decreased under low H2O conditions in flue gas, and significantly decreased under high H2O conditions at 10 barg. The study identified the effects of H radicals and H2O fraction on the oxidation and decrease of NOx and SOx.
Article
Thermodynamics
Chaowei Wang, Chang'an Wang, Maoyun Luo, Lin Zhao, Pengqian Wang, Yujie Hou, Pengbo Zhao, Defu Che
Summary: The technology of oxy-fuel co-combustion is beneficial for consuming large amounts of ultra-low volatile coal-based solid fuels. It can promote the development of coal-chemical industry and reduce carbon emissions in power plants. However, the co-gasification behaviors of various coal-based solid fuel blends during the initial oxy-fuel co-firing stage need further study.
Article
Chemistry, Applied
Jingchong Yan, Yasen Wu, Li Zhang, Shunjin Huang, Zhiping Lei, Zhanku Li, Weidong Zhang, Shibiao Ren, Zhicai Wang, Hengfu Shui
Summary: This study evaluates the influence of co-firing municipal sewage sludge with coal gangue on pollutant emissions. The results show that co-combustion leads to smoother combustion and reduced activation energy. It also improves the retention of heavy metals in the ashes and facilitates in-situ desulfurization and denitration. These findings suggest that co-combustion of multiple wastes is a feasible approach for resource utilization and environmental impact reduction.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Thermodynamics
Chaowei Wang, Chang'an Wang, Qinqin Feng, Qisen Mao, Xinyue Gao, Yongbo Du, Guangyu Li, Defu Che
Summary: The experimental study on oxy-fuel co-firing of pyrolyzed semi-coke powder and gasification residual carbon shows that it can reduce NOx generation and improve carbon burnout efficiency. This research provides guidance for the clean and efficient utilization of carbon-based solid wastes and the development of carbon capture technology.
Article
Thermodynamics
Monika Kosowska-Golachowska
JOURNAL OF THERMAL SCIENCE
(2017)
Article
Thermodynamics
Adam Gnatowski, Agnieszka Kijo-Kleczkowska
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2020)
Article
Thermodynamics
Agnieszka Kijo-Kleczkowska
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2020)
Article
Thermodynamics
Adam Gnatowski, Agnieszka Kijo-Kleczkowska, Rafal Golebski, Kamil Mirek
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2020)
Article
Chemistry, Physical
Adam Gnatowski, Agnieszka Kijo-Kleczkowska, Mateusz Chyra, Dariusz Kwiatkowski
Summary: The research conducted experimental and numerical analysis on the deformation of polymer pipes under different load values, finding comparable results and focusing on the impact of load values on the deformation of polyethylene pipes.
Article
Energy & Fuels
Monika Kosowska-Golachowska, Adam Luckos, Agnieszka Kijo-Kleczkowska
Summary: The paper examines the emissions of various pollutants during the combustion of biomass and coal under different atmospheres. Results show that biomass combustion produces lower emissions of SO2, N2O, and CO compared to coal, and oxy-combustion further reduces NO emissions. This suggests that biomass is an ideal renewable energy source with minimal environmental pollution potential.
Article
Energy & Fuels
Monika Kosowska-Golachowska, Adam Luckos, Tomasz Czakiert
Summary: The utilization of biomass as a carbon-neutral fuel can reduce greenhouse gas emissions. This study compares the emissions from the combustion of different energy crops with reference coal and shows that biomass has lower emissions. The oxidation of volatile nitrogen compounds is the main cause of high NOx emissions from biomass combustion.
Article
Chemistry, Applied
Agnieszka Kijo-Kleczkowska, Adam Gnatowski, Magdalena Szumera, Dariusz Kwiatkowski
POLISH JOURNAL OF CHEMICAL TECHNOLOGY
(2020)
Proceedings Paper
Energy & Fuels
M. Kosowska-Golachowska, A. Luckos, A. Kijo-Kleczkowska, T. Musial, K. Wolski, K. Sroda
III ALTERNATIVE FUELS FORUM
(2019)
Article
Thermodynamics
Adam Gnatowski, Agnieszka Kijo-Kleczkowska, Henryk Otwinowski, Piotr Sikora
Proceedings Paper
Energy & Fuels
Monika Kosowska-Golachowska, Henryk Otwinowski, Krzysztof Wolski, Agnieszka Kijo-Kleczkowska, Tomasz Musial, Katarzyna Sroda, Damian Richter
RENEWABLE ENERGY SOURCES: ENGINEERING, TECHNOLOGY, INNOVATION
(2018)
Article
Mining & Mineral Processing
Agnieszka Kijo-Kleczkowska, Magdalena Szumera, Katarzyna Sroda
ARCHIVES OF MINING SCIENCES
(2017)
Proceedings Paper
Energy & Fuels
Monika Kosowska-Golachowska, Tomasz Musial, Dariusz Urbaniak, Henryk Otwinowski
ENERGY AND FUELS 2016
(2017)
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.
