Article
Energy & Fuels
Siqi Liu, Guangqing Zhu, Yanqing Niu, Liping Wen, Yu Lei, Denghui Wang, Shi'en Hui
Summary: This study investigates the relationship between char fragmentation/mineral coalescence and PM formation, finding that char fragmentation significantly increases the number of fine ash particles while dense char structure disadvantages char fragmentation but enhances mineral coalescence. The distribution of fly ash at different temperatures is influenced by the percolation theory, with particles at higher temperatures mainly undergoing perimeter fragmentation. The effect of ash content is more related to the distribution of mineral grains within char particles.
Article
Thermodynamics
Aoyang Zhang, Xiaowei Liu, Yishu Xu, Tianpeng Zhang, Minghou Xu
Summary: An improved model of fine particulate matter formation, which combines the mechanisms of mineral coalescence and char fragmentation under different pulverized coal combustion environments, has been developed. The model includes a three-dimensional sub-model of char particles and a sub-model of mineral melting coalescence. The model has shown good fitting effects with experimental data and provides a better understanding of the particulate matter formation process.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Thermodynamics
Yuanyuan Zhang, Wenrui Li, Xiangying Cheng, Kezhou Yan, Wenxin Zhao, Fengling Yang
Summary: The combustion characteristics of coal gangue and weathered coal were studied under different atmospheres, and the interactions between the two were observed under oxygen-enriched oxy-fuel condition, which may be related to the thermal effect.
Article
Chemistry, Applied
Ao Zhou, Wenjing Ma, Renhui Ruan, Yuan Li, Qingfu Zhang, Rui Mao, Shilin Yu, Shuanghui Deng, Houzhang Tan, Xuebin Wang
Summary: This study investigates the formation characteristics of particulate matter (PM10) produced by the co-combustion of sludge and pulverized coal. The results show that the furnace temperature and sludge mixing ratio have an impact on the mass-based particle size distribution and elemental composition of PM10. Increasing the furnace temperature increases the yield of PM10, while increasing the sludge mixing ratio reduces the yield of PM10.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Chao Tong, Xigang Yang, Guoqing Chen, Yong Zhang, Lulu Chen, Yang Zhou, Tengfei He, Baosheng Jin
Summary: The study shows that the combustion characteristics of blended coals vary with the percentage of petroleum coke in the blend, with 30% petroleum coke content resulting in optimal combustion performance. Kinetic analysis reveals the relationship between the combustion characteristics of blended coals and activation energy.
Article
Thermodynamics
Yueh-Heng Li, Stalline Pangestu, Aris Purwanto, Chih-Ting Chen
Summary: This study investigated the combustion behaviors of pure iron and mixed particles, particularly iron-aluminum and iron-coal mixtures doped into methane-air premixed flames. Different particles showed varying effects on the flame, with microexplosions occurring in the iron-coal mixture.
COMBUSTION AND FLAME
(2021)
Article
Chemistry, Applied
Xiaomin Li, Xun Gong, Chuxuan Zhang, Tianyi Feng, Zhipeng Ouyang, Yang Peng
Summary: This study investigates the effects of seasonal change on mineral elements in Platanus orientalis leaves and wood, as well as the impact of co-combustion on PM10 emissions. The results show that seasonal change does affect the elemental contents in leaves, while wood has significantly lower elemental content. Combustion of leaves generates more particulate pollutants, while wood combustion produces the least PM10. Co-combustion effectively reduces the generation of PM10.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Xiaomin Li, Xun Gong, Chuxuan Zhang, Tianyi Feng, Zhipeng Ouyang, Yang Peng
Summary: The research focused on the effects of seasonal change on mineral elements in different parts of Platanus orientalis and their impact on PM10 emissions during co-combustion with coal. Results showed that elemental contents vary between green and yellow leaves, with the least in wood. Additionally, combustion of green leaves produced more particulate pollutants, while wood combustion produced the least PM10.
FUEL PROCESSING TECHNOLOGY
(2022)
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, Multidisciplinary
Dan-lu Pan, Wei-ting Jiang, Rui-tang Guo, Yang Huang, Wei-guo Pan
Summary: The combustion characteristics of waste tire powders, bituminous coal, and their blends were studied using a thermogravimetric analyzer. An increase in heating rate led to higher combustion temperature of tire powders but reduced maximum weight loss rate. Blends of coal and tire powders exhibited characteristics similar to their individual components, indicating minimal interaction effects between the two materials.
Article
Energy & Fuels
Eduardo Garcia, Manuel F. Mejia, Hao Liu
Summary: The co-combustion of coal and waste coffee grounds is a sustainable and environmentally friendly option for waste disposal and energy production. This study investigated the combustion characteristics of coal blended with coffee grounds and found that coffee grounds can reduce the efficiency loss of coal combustion and minimize agglomeration tendency.
Article
Thermodynamics
Qi Wang, Enlu Wang, Oguga Paul Chionoso
Summary: Injecting coal/biomass blends can improve the combustion performance of ironmaking blast furnaces. The study indicates that blending hydrochar with coal can enhance the flow and combustion performance of the blends, with the most significant effect observed when hydrochar accounts for 75% of the mixture.
Article
Thermodynamics
Bei Li, Gang Liu, Weili Sun, Lili Ye, Mingshu Bi, Wei Gao
Summary: The combustion characteristics, functional groups, and kinetic behavior of coal gangue (CG) and raw coal (RC) were investigated using TG/FTIR techniques. Results showed that CG contained more aliphatic hydrocarbons and naphthenic bands than RC, leading to the production of more gaseous products after 400 degrees C. Three decomposition stages for both samples were identified based on characteristic temperatures obtained from TG data.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Green & Sustainable Science & Technology
Fariha Kanwal, Ashfaq Ahmed, Farrukh Jamil, Sikander Rafiq, H. M. Uzair Ayub, Moinuddin Ghauri, M. Shahzad Khurram, Shahid Munir, Abrar Inayat, Muhammad S. Abu Bakar, Surendar Moogi, Su Shiung Lam, Young-Kwon Park
Summary: The study revealed that the combustion of a blend containing 60% coal and 40% sunflower residue was the most efficient, resulting in less emission of NOx, SOx, and CO2 compared to pure coal combustion. The results suggest great potential for using selected biomass residues in blend with coal for environmentally friendly and sustainable energy production.
Article
Energy & Fuels
Ye Yuan, Yong He, Jiaxin Tan, Yongmeng Wang, Sunel Kumar, Zhihua Wang
Summary: This study investigated the co-combustion characteristics of coal and biomass blends using thermogravimetric analysis and found that increasing the biomass percentage improved combustion performance. A 20% blending ratio was identified as the optimal percentage for co-utilization of coal-biomass blends.
FRONTIERS IN ENERGY RESEARCH
(2021)
Review
Energy & Fuels
Md Tanvir Alam, Baiqian Dai, Xiaojiang Wu, Andrew Hoadley, Lian Zhang
Summary: Gasification or combustion of coal and biomass is the main form of power generation, but it leads to ash generation and subsequent slagging at high temperatures. Understanding ash properties and slag characteristics is crucial for improving gasifier/combustor facilities.
FRONTIERS IN ENERGY
(2021)
Article
Thermodynamics
Miriam Issac, Lian Zhang
Summary: This study investigates the ash slagging characteristics of zinc-rich tyre ash and its interaction with silica-rich coal ash in a reducing environment, using experimental studies, advanced analytical techniques, and thermodynamic equilibrium calculations. Zinc in tyre ash remains in a hemimorphite coordination structure and acts as a fluxing agent, enhancing the flowability of the slag significantly. The blending of tyre ash with coal ash can alleviate corrosion issues by scavenging zinc into the silica matrix, protecting the substrate.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Chemistry, Physical
Qiaoqiao Zhou, Sasha Yang, Huanting Wang, Zhenyu Lian, Lian Zhang
Summary: This paper presents the unique properties and catalytic performance of scrap tyre char in the selective deoxygenation of biomass volatiles into value-added light oxygenates. The inclusion of sulphur and zinc oxide during prior tyre manufacturing process results in an abundance of organically bound sulphur and nano-sized zinc sulphide in the tyre char, which exhibit multiple acidic sites with different catalytic activities. Reactivity and stability are enhanced through in-situ transformations of active acid sites, enabling prolonged catalyst lifespan and improved performance in cyclic tests.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Song Zhou, Barbara Etschmann, Binbin Qian, Cheng Liu, Lian Zhang
Summary: This study investigates the evolution of chlorine during the pyrohydrolysis of CaCl2 waste, focusing on the use of silica and MgCl2 to promote the release of HCl gas. The addition of silica enables pyrohydrolysis to start at a lower temperature than predicted, while MgCl2 improves HCl regeneration to nearly 100%. Incorporating Mg2+ leads to a unique structural change, facilitating the easier liberation of Cl- from the silicate matrix.
Article
Chemistry, Physical
Binbin Qian, Jianghao Zhang, Song Zhou, Jun Lu, Yue Liu, Baiqian Dai, Cheng Liu, Yong Wang, Huanting Wang, Lian Zhang
Summary: High-purity magnesium hydroxide nanosheets were successfully synthesized from brown coal fly ash waste using a sequence of leaching, precipitation, and ethanol-mediated hydrothermal processing. The resulting nanosheets exhibited specific surface area of 100 m2/g and an aspect ratio of 11.8, showing superior catalytic performance for high-temperature water gas shift reaction when loaded with Fe3+. This study opens up potential for valorizing fly ash and other magnesium-bearing solid wastes into high-value materials for catalytic applications.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Engineering, Environmental
Lei Qin, Weifeng Liu, Song Zhou, Yun Qu, Binbin Qian, Yongzhen Yang, Xiwang Zhang, Huanting Wang, Lian Zhang, Xuguang Liu
Summary: A novel surface imprinted adsorbent with UV-switchable wettability has been synthesized for efficient and highly selective phenol recovery from wastewater. The adsorbent demonstrates a superior adsorption capacity after UV irradiation and can be easily recovered by self-agglomeration and precipitation in the dark. Regenerated adsorbent maintains stable adsorption capacity over multiple cycles, making it a promising solution for phenol removal from wastewater.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
Tara Hosseini, Lian Zhang
Summary: The study explores the integration of concentrated solar power into low-rank coal pyrolysis to improve energy efficiency and reduce emissions. While using a solar tower for both coal drying and pyrolysis can save energy, it is not economically feasible. On the other hand, using parabolic trough solar collectors for coal drying only proves to be more economically viable and even slightly outperforms the conventional pyrolysis process in economic terms.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Feifei Zhang, Yinlong Zhu, Cheng Tang, Yu Chen, Binbin Qian, Zhiwei Hu, Yu-Chung Chang, Chih-Wen Pao, Qian Lin, Seyedeh Alieh Kazemi, Yun Wang, Lian Zhang, Xiwang Zhang, Huanting Wang
Summary: A new type of W SAC with unique local structure was designed and prepared, showing excellent performance in electrochemical ORR, particularly in terms of H2O2 selectivity and operational durability. The findings open up new opportunities for developing high-performance W-based catalysts for electrochemical H2O2 production.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Environmental
Shenyong Li, Yu Qi, Yuneng Tang, Hasan Jubaer, Baiqian Dai, Song Zhou, Qianqian Liu, Zhenyu Chen, Yuxia Zhu, Haitao Song, Lian Zhang
Summary: This paper investigates the regeneration of a commercial FCC spent catalyst in different combustion modes, utilizing a variety of techniques to reveal the speciation, distribution, and evolution of coke during heating and combustion processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Khai Jie Yong, Ta Yeong Wu, Cornelius Basil Tien Loong Lee, Zhi Jin Lee, Qinpu Liu, Jamaliah Md Jahim, Qiaoqiao Zhou, Lian Zhang
Summary: This review critically analyzes the recent progress of industrial furfural production from lignocellulosic biomass worldwide, discussing both traditional processes and novel technologies, as well as exploring future technology development opportunities.
BIOMASS & BIOENERGY
(2022)
Article
Engineering, Environmental
Sasha Yang, Lei Shi, Qiaoqiao Zhou, Binbin Qian, Anthony De Girolamo, Lian Zhang
Summary: This study conducted systematic experiments to explore the synergistic interaction during the flash pyrolysis of lignocellulosic biomass. The results confirmed that the interaction of biomass components was affected by both heterogeneous char-volatile and homogeneous volatile-volatile interactions. The study also found that the interaction between cellulose/xylan and lignin played a crucial role in promoting overall conversion and increasing bio-oil and non-condensable gas yields.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Applied
Yu Qi, Qianqian Liu, Shenyong Li, Qiaoqiao Zhou, Zhenyu Chen, Yuxia Zhu, Yan Chen, Haitao Song, Ying-Rui Lu, Ting-Shan Chan, Baiqian Dai, Lian Zhang
Summary: This study establishes a simple method to quantify the NiO content in commercial Ecats collected from different FCC units. The validity of the method is verified using chemical leaching and X-ray absorption analysis. The study also reveals the coordination structure of Ni and its affiliation with other metal oxides.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Tanvir Alam, Andrew Hoadley, Lian Zhang
Summary: In this study, an inclined plate technique was used to investigate the slagging propensity of bio-ashes and the flowability of the resulting bio-slags in a reducing gas environment at 1300 degrees C. Different approaches were trialled to measure and visualize the slagging propensity of bio-ash as a function of MgO content, as well as their comparison with reference coal ashes and several synthetic ashes generated by blending bio-ash with CaO, Al2O3, SiO2 and K2O. The study found that MgO content had little influence on the ash fusion temperature, but the flowability of the relatively high viscosity bio-slags was slow. CaO was the most influential in promoting the flowability of ash matrix, while the co-presence of K2O and Al2O3 resulted in a significant decrease in slag flowability. Traditional methodologies for ash study, such as the base/acid (B/A) ratio and thermodynamic equilibrium prediction, were not suitable for differentiating coal ash and bio-ash.
Article
Chemistry, Applied
Binbin Qian, Sasha Yang, Jianghao Zhang, Song Zhou, Barbara Etschmann, Cheng Liu, Baiqian Dai, John Cashion, Yong Wang, Huanting Wang, Lian Zhang
Summary: This study demonstrates the synthesis of magnetite-based encapsulated catalyst from coal fly ash and its application to high temperature water-gas shift reaction. The encapsulated catalyst showed improved activity and stability compared to pure hematite, and impurity elements were found to influence the catalyst's properties. The study opens up new possibilities for utilizing solid waste as valuable catalysts and provides a cost-effective approach for designing and fine-tuning encapsulated catalysts.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Environmental
Shenyong Li, Qiuqiao Jiang, Yu Qi, Dongyue Zhao, Yuneng Tang, Qianqian Liu, Zhenyu Chen, Yuxia Zhu, Baiqian Dai, Haitao Song, Lian Zhang
Summary: This paper investigates the emissions of hydrogen cyanide (HCN) and other N-bearing air pollutants from fluid catalytic cracking (FCC) regeneration units. Experimental results show that increasing the surface exposure of hard coke can significantly increase HCN emissions. The accessibility of oxygen is found to be the principal factor governing HCN emissions. Rapid heating is an effective method to reduce HCN emissions by promoting the volatilization of soft coke and enhancing oxygen accessibility to hard coke and internal N-bearing precursors.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.