Article
Environmental Sciences
Huakun Wang, Yishu Xu, Kai Zhang, Baohua Zhang, Shanshan Min, Yimin Liu, Jingji Zhu, Jingjing Ma
Summary: The addition of nano SiO2 as a coal combustion additive can effectively reduce the formation of ultrafine particulate matter, showing higher capture efficiency than existing micron-sized natural clay minerals. However, its performance varies depending on the coal type due to differences in ash content and composition.
Article
Energy & Fuels
Yishu Xu, Xiaowei Liu, Jingji Zhu, Kai Zhang, Huakun Wang, Jingying Xu, Minghou Xu
Summary: The study found that adding a small amount of nano Al2O3 and TiO2 can effectively reduce the mass yields of central PM and PM2.5, showing different PM reduction characteristics compared to traditional additives. The nano additives promoted the migration of small ash particles into coarse PM and minimized the migration of mineral vapors into central PM via heterogeneous condensation, enhancing the condensation/reaction of mineral vapors with larger specific surface area.
Article
Energy & Fuels
Xiaoyu Zhang, Yuzhong Li, Lu Wang, Zhuping Zhang, Yong Dong
Summary: This study found that adding an appropriate amount of biomass to pulverized coal can effectively inhibit the production of coal-fired condensable particulate matter. Cornstalk showed the most significant inhibitory effect on CPM, with an addition ratio of around 30%. Additionally, adding cornstalk was also found to decrease the content of certain components in CPM and efficiently reduce the amount of aromatic compounds, the substances with the highest toxicity levels in CPM, at an approximate addition ratio of 30%.
Article
Green & Sustainable Science & Technology
Wei Cheng, Youjian Zhu, Jing'ai Shao, Wennan Zhang, Guihao Wu, Hao Jiang, Junhao Hu, Zhen Huang, Haiping Yang, Hanping Chen
Summary: A new phosphoric acid modification method was proposed to improve the reduction efficiency of PM0.2 by kaolin additive in agricultural biomass pellet combustion, significantly reducing PM0.2 emissions. The modification destroyed the internal structure of kaolin and increased its pore structure, leading to better alkali capture ability.
Article
Chemistry, Applied
Xinglei Qiu, Yueming Wang, Zhengang Zhou, Yuanqiang Duan, Lunbo Duan
Summary: Pressurized fluidized bed oxy-fuel combustion is considered a promising clean coal technology for CO2 capture. This study investigated the particulate matter formation under pressurized conditions and found that the concentration of PM1 in oxy-fuel combustion was higher than in air combustion, but the difference decreased with increasing pressure. Additionally, elevated pressure reduced the concentration of PM1 while increasing the concentration of PM1-10.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Yu Lei, Yanqing Niu, Wen 'an Ma, Guangyao Wang, Liping Wen, Haiyu Huang, Shi 'en Hui
Summary: This study investigated the effect of H2O on the formation of ultrafine particulate matter (PM) in an oxy-combustion atmosphere with different O(2) contents. The results showed that as the H2O content increased, the mass and number yield of ultrafine PM initially decreased and then increased, with an inflection point at 5% H2O content. The yield of ultrafine PM in the oxy-combustion atmosphere was more sensitive to H2O when the O(2) content was low.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Green & Sustainable Science & Technology
Yong Wei, Guijian Liu, Biao Fu, Ruwei Wang, Yuan Liu, Xuan Xue, Mei Sun
Summary: This study evaluated the distribution and partitioning behavior of Pb in size-resolved fine PM collected from an industrial circulating fluidized bed power plant. The mechanism of Pb enrichment in supermicron particles was mainly controlled by surface adsorption reaction, while gas-film transfer or heterogenous condensation might represent the deposition mechanism for submicron particles. Additionally, the emission of fine SiO2-bearing particles should be limited due to their potential harm to the respiratory system.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Duarte Magalhaes, Feyza Kazanc
Summary: The study found that co-combustion of thermally pre-treated biomass and coal led to a significant reduction in PM2.5 emissions, approaching levels of biomass fuel, and the mechanisms for PM formation during combustion were found applicable to biomass-coal blends. The shift from fine to coarser particles during co-firing is likely to enable the capture of PM from biomass-coal co-firing by conventional coal-PM traps in existing coal power plants.
Article
Energy & Fuels
Jianping Yang, Qin Li, Wenbing Zhu, Wenqi Qu, Min Li, Zhengyong Xu, Zequn Yang, Hui Liu, Hailong Li
Summary: This study utilized the abundant mineral chalcopyrite as an efficient trap for Hg-0 sequestration, showing excellent removal performance in a wide temperature range and minimal interference from typical flue gas components. The adsorption capacity and rate of CuFeS2 were significantly higher than commercial activated carbons, attributed to the oxidizing and immobilizing abilities of disulfide ligands, and the sorbent could be regenerated through thermal decomposition, saving operation costs. CuFeS2 is identified as a potential, cost-effective trap for efficient remediation of Hg-0 from coal combustion flue gas.
Article
Engineering, Environmental
Zhenyao Xu, Yujia Wu, Siqi Liu, Minghui Tang, Shengyong Lu
Summary: This study investigates the emissions of filterable particulate matter (FPM) and condensable particulate matter (CPM) from a coal-fired power plant. The results show that the concentration of CPM increases when coal is mixed with sludge. Most air pollutant control devices have a positive effect on the removal of FPM and CPM, except for the selective catalytic reduction (SCR) denitration device. The low-low temperature electrostatic precipitator has the highest removal efficiency for both FPM and CPM. The organic fraction in CPM is mainly composed of hydrocarbons and organosilicon.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Chemistry, Applied
Wu Yang, Deepak Pudasainee, Rajender Gupta, Wei Li, Ben Wang, Lushi Sun
Summary: This paper systematically reviews the PM sampling and measurement methods, formation mechanisms, distribution, inorganic composition and the factors influencing PM emission during combustion of coal/biomass/MSW. Coarse particle emissions from coal combustion are generally higher than those from biomass, while ultrafine and fine particle emissions from biomass combustion are higher than those from coal. Particle emissions are related to various influencing factors such as solid fuel particle size, inherent ash content, mineral properties, binding form of inorganic elements, combustion parameters, and ash chemical composition.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Thermodynamics
Christian Axt, Anna Massmeyer, Stefan Pielsticker, Reinhold Kneer
Summary: The formation of inhalable fine particles is a harmful side effect of solid fuel combustion processes, and understanding this process is crucial for environmental protection. Previous studies focused on simplified laminar combustion conditions, while the behavior of turbulent flame structures in real industrial applications remains poorly understood. This study developed a test rig to investigate particulate matter formation and found that local differences play a significant role in particulate matter formation.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Jingkun Han, Dunxi Yu, Jianqun Wu, Xin Yu, Fangqi Liu, Minghou Xu
Summary: Torrefaction is a promising technology for biomass utilization, but its effects on ash-related issues during combustion and co-combustion are seldom concerned. In this study, the authors conducted experiments to investigate the particulate matter (PM) emission during combustion of torrefied biomass. The results showed that torrefaction effectively reduced the release of sulfur and chlorine, and promoted the transformation of alkaline and alkaline earth metals (AAEMs) into less-reactive forms, leading to a reduction in PM1 emission.
Article
Green & Sustainable Science & Technology
Yujia Wu, Zhenyao Xu, Siqi Liu, Minghui Tang, Shengyong Lu
Summary: CPM, containing harmful organic pollutants, is the dominant component of total particulate matter emitted from coal combustion. The concentrations of n-alkanes and phthalates in CPM were significantly lower in coal-fired power units compared to coal-fired industrial units. Dry-type precipitators showed effective control of C-N and C-P emissions, with varying effects observed with desulfurization systems and wet-type precipitators.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Hisam Samae, Surajit Tekasakul, Perapong Tekasakul, Masami Furuuchi
Summary: Data on emission of particulate matter and polycyclic aromatic hydrocarbons (PAHs) from combustion of 11 types of biomass and bituminous coal were analyzed, showing that emission factors were influenced by the moisture content of biomass. Higher emissions were observed from Avicennia alba Blume, Xylocarpus moluccensis, and bituminous coal.
Article
Energy & Fuels
Zijian Zhou, Lei Liu, Xiaowei Liu, Yue Zhou, Changqing Wang, Jingying Xu, Guozhang Chang, Minghou Xu
Summary: MnOx-based oxides are efficient catalysts for elemental mercury oxidation in flue gas, and combining with CeO2 or CeO2-ZrO2 enhances their catalytic activity. The new MnOx-CeO2-ZrO2 solid solution catalyst showed better Hg-0 oxidation performance compared to the MnOx/CeO2-ZrO2 supported catalyst. Mn4+ and surface active oxygen were identified as the active species in Hg-0 oxidation reactions, and SO2 significantly inhibited the activity of MnOx/CeO2-ZrO2 but had less impact on MnOx-CeO2-ZrO2 solid solution.
Article
Chemistry, Physical
Linbo Qin, Bo Zhao, Wangsheng Chen, Xiaowei Liu, Jun Han
Summary: The study synthesized Fe-x_Mn-y/γ-Al2O3 catalysts via reflux-coprecipitation method and characterized them using various techniques. It was found that the synergy between nonthermal plasma and Fe-x_Mn-y/γ-Al2O3 catalysts significantly improved toluene removal efficiency and reduced secondary pollutants. The Fe-1_Mn-1/Al2O3 catalyst exhibited the highest removal efficiency and CO2 selectivity under specific conditions.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Zijian Zhou, Lei Liu, Xiaowei Liu, Yue Zhou, Chengpu Li, Dejun Peng, Jingying Xu, Changqing Wang, Xiangkun Elvis Cao
Summary: Cigarette butts were used to synthesize nano-FeOx through a combustion method, with different modes leading to variations in the physical and chemical characteristics of the resulting particles.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Lidan Deng, Qiao Chen, Xingmao Jiang, Xiaowei Liu, Zheng Wang
Summary: In this study, it was found that the catalytic performance of Pt/SBA-15 can be significantly improved by introducing an appropriate amount of indium. Among all catalysts tested, 1Pt1In/SBA-15 exhibited the highest initial propane conversion rate (57.06%) and selectivity towards propylene (99.04%). The catalytic activity decreased slightly after 28 hours of reaction, but the selectivity remained high at over 99%.
Article
Thermodynamics
Yishu Xu, Huakun Wang, Xiaowei Liu, Jingji Zhu, Jingying Xu, Minghou Xu
Summary: This study simulated the boiler system of a coal-fired power plant unit under coal-fired and ammonia-coal co-firing conditions, and analyzed the impacts of ammonia co-firing on emission and thermal properties. The results showed that ammonia co-firing effectively reduced CO2 emissions without significantly affecting the thermal economy.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Yishu Xu, Xiaowei Liu, Jingji Zhu, Kai Zhang, Huakun Wang, Jingying Xu, Minghou Xu
Summary: The study found that adding a small amount of nano Al2O3 and TiO2 can effectively reduce the mass yields of central PM and PM2.5, showing different PM reduction characteristics compared to traditional additives. The nano additives promoted the migration of small ash particles into coarse PM and minimized the migration of mineral vapors into central PM via heterogeneous condensation, enhancing the condensation/reaction of mineral vapors with larger specific surface area.
Article
Energy & Fuels
Yishu Xu, Jingji Zhu, Xiaowei Liu, Jiuxin Qi, Huakun Wang, Xiaobei Cheng, Jingying Xu
Summary: This study investigates the combustion of bituminous coal in a realistic low-O2 environment, and comprehensively characterizes the morphology, nanostructure evolution, and oxidation characteristics of different maturity levels of soot in the flame. The results indicate that liquidus tar acts as a precursor for soot formation, and that the mature soot particles contain fullerenic, amorphous, and diamond phases. Additionally, it is found that soot in the bright flame core is more difficult to be oxidized.
Article
Environmental Sciences
Yongda Huang, Hongyun Hu, Biao Fu, Chan Zou, Huimin Liu, Xiaowei Liu, Linling Wang, Guangqian Luo, Hong Yao
Summary: This study investigates the formation mechanism, removal characteristics, and inhalation bioaccessibility of fine particulate-bound arsenic and selenium in coal-fired power plants. The findings demonstrate that different types of boilers contribute to the enrichment of arsenic and selenium in different sizes of particulate matter. Additionally, arsenic is mainly formed by chemical adsorption, while selenium is closely related to specific mineral components. The study also highlights the higher inhalation bioaccessibility of finer particulate-bound arsenic and selenium.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Electrical & Electronic
Shihao Xu, Xiaowei Liu, Zehua Yu, Kang Liu
Summary: This study presents a non-contact optical method to quantify the negative pressure in micron-sized water voids, providing a simple and accurate approach for measuring the properties and flow behavior of water under tension. The results demonstrate the effectiveness of this technique and its potential for further investigation.
FRONTIERS OF OPTOELECTRONICS
(2022)
Article
Engineering, Environmental
Jie Xu, Xiaowei Liu, Zijian Zhou, Lidan Deng, Lei Liu, Minghou Xu
Summary: Experimental and theoretical studies reveal that doping of Cr into MgAl layered double hydroxide can effectively reduce band gap, introduce intermediate band, generate more surface defects, and lower the energy of CO release, comprehensively enhancing activity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Lidan Deng, Xiaowei Liu, Zaikun Wu, Jie Xu, Zijian Zhou, Minghou Xu
Summary: In this study, the conventional sequential impregnation synthetic method for preparing Pt-Sn/SiO2 catalysts for propane dehydrogenation was improved. Different synthesis procedures were examined and the results showed that the direct reduction method produced Pt3Sn alloy nanoparticle and displayed the best catalytic performances. These findings demonstrated the importance of suitable catalyst preparation procedures to enhance the catalytic activities of Pt-Sn/SiO2 catalysts.
Article
Thermodynamics
Le Lei, Xiaowei Liu, Huakun Wang, Yue Zou, Yishu Xu, Minghou Xu
Summary: In this study, a solar-aided coal-fired power generation (SACPG) system is proposed to combine solar energy with traditional coal-fired power stations in order to solve the issues of massive coal consumption and pollution discharge. The research shows that using solar energy to heat the feedwater recycle system can achieve the highest total thermal efficiency and boiler thermal efficiency, thus saving coal and water resources.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Engineering, Environmental
Yue Zou, Xiaowei Liu, Kui Wu, Yunfei Zhai, Yuyang Li
Summary: This study investigates the impact of sulphur and chlorine on the formation of condensable particulate matter (CPM) during coal combustion. The addition of SO2 increases the CPM content, while the presence of chlorine decreases the sulphur content in CPM. These findings are significant for understanding the generation mechanism of CPM.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
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
Chemistry, Physical
Lidan Deng, Zheng Wang, Xingmao Jiang, Jie Xu, Zijian Zhou, Xiaozhong Li, Zhixiong You, Mingyue Ding, Tetsuya Shishido, Xiaowei Liu, Minghou Xu
Summary: This study demonstrates an efficient method for the synthesis of formaldehyde from CO2 through water catalysis, achieving high conversion and yield even at room temperature and ambient pressure. HCOOH is identified as an important reaction intermediate, and the presence of surface -OH groups in LDH and the hybrid electronic state of Ru catalyst contribute to the highly efficient formation of formaldehyde.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
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.