Article
Energy & Fuels
Dorcas L. E. Uaciquete, Kosuke Sakusabe, Takahiro Kato, Hirokazu Okawa, Katsuyasu Sugawara, Risehiro Nonaka
Summary: Mercury forms in coal-fired power plant fly ash were qualitatively and quantitatively determined using X-ray absorption near edge structure (XANES) analysis. The mercury content in fly ash increased linearly with an increase in unburned carbon content. The inflection point method was used to estimate the type and abundance of chemical forms present, with a linear combination fitting of control mercury compounds used for modeling the XANES spectrum of fly ash mercury.
Article
Energy & Fuels
Yanli Wu, Wenrui Chang, Marcos Millan, Yanhong Hao
Summary: A model for mercury transformations in a flue gas treatment process was established in this study. Concentrations, mass flow rates, and emission factors of mercury, NOX, PM, and SO2 were investigated in a coal-fired power plant. The mercury removal efficiency of different units, such as the SCR unit, ESP, and WFGD, were also analyzed. The proposed flue gas treatment process model is considered a feasible approach for quantitative evaluation of multi-pollutants emissions at plant level.
Article
Engineering, Environmental
Qing Chen, Long Chen, Jiashuo Li, Yaqin Guo, Yongjie Wang, Wendong Wei, Chang Liu, Jiayuan Wu, Feiyun Tou, Xuejun Wang, Yi Yang
Summary: This study investigates the trend and output of mercury (Hg) content in fly ash from coal-fired power plants in China through a national sampling campaign, literature survey, and model predictions. The results show that the Hg content in fly ash is increasing, mainly due to the installation of advanced air pollution control devices. This highlights the need for stricter requirements for the disposal of solid Hg waste in China's coal-fired power plants.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Energy & Fuels
Li Bing, Wang Hongliang
Summary: The study found that the main type of mercury emitted in coal-fired flue gas is gaseous mercury, and the mercury emissions from all units meet the standard requirements. SCR denitration facilities have a significant impact on mercury type, promoting the oxidation of elemental mercury into oxidized mercury that can be easily removed downstream. Particulate mercury and oxidized mercury are synergistically removed in dust removal and wet desulfurization facilities, respectively.
Article
Chemistry, Physical
Yang Teng, Peixuan Li, Guangyu Wang, Chen Wang, Nana Qi, Kai Zhang, Minwu Wang
Summary: Field testing at a 300 MW coal-fired power station showed that selective catalytic reduction (SCR) can effectively reduce mercury content in flue gas. Commercial testing demonstrated that SCR catalyst breakage resulted in an increase in total mercury concentration at the electrostatic precipitator (ESP) inlet and outlet. Laboratory experiments confirmed the Hg0 oxidation capability of the commercial SCR catalyst.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Energy & Fuels
Weimeng Zhao, Xinze Geng, Jincheng Lu, Yufeng Duan, Shuai Liu, Peng Hu, Yifan Xu, Yaji Huang, Jun Tao, Xiaobing Gu
Summary: The study demonstrated that brominated biomass activated carbon is an effective alternative adsorbent with good mercury removal performance in different scale experiments.
Article
Environmental Sciences
Yiming Huang, Jinling Liu, Guan Wang, Qingfeng Wang, Boping Zeng, Zhongjiu Xiao, Guangyi Sun, Zhonggen Li
Summary: This study investigated the different forms of Hg in coal fly ash from fifteen coal-fired power plants in Guizhou province, and found that Hg was mainly present in strong complexed form. Leaching experiments showed that acidic and strong alkaline conditions could lead to higher Hg leachability.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Energy & Fuels
Dorcas Linda Ernesto Uaciquete, Takahiro Kato, Hirokazu Okawa, Katsuyasu Sugawara, Risehiro Nonaka
Summary: This study investigated the elution pattern and dissolvable amount of mercury in desulfurization gypsum through batch and semi-batch elution tests. The results revealed that the semi-batch method is more accurate for evaluating mercury elution from desulfurization gypsum.
Article
Thermodynamics
Hariana, Hanafi Prida Putra, Prabowo, Edi Hilmawan, Arif Darmawan, Keiichi Mochida, Muhammad Aziz
Summary: This study investigated the potential slagging and fouling when co-firing coal with different biomasses and found that co-firing coal with palm oil empty fruit bunch-frond, wood chip, or rice husk at a 25% blend offered similar combustion characteristics, gas emissions, ash deposits, and mineralogy. Co-firing with less than 25% solid recovered fuel requires further investigation to mitigate the slagging and fouling tendency. These findings are important for identifying suitable biomass fuels for co-firing with coal in power plants.
Article
Environmental Sciences
Hridesh Agarwalla, Tarit Baran Das, Rabinarayan Senapati, Monalisa Gangopadhyay, Reginald E. E. Masto, Manish Kumar, Vikram Singh
Summary: India is a major emitter of mercury, primarily from coal combustion in power plants. Mercury content in coal samples from the SECL region in India was positively correlated with ash and sulfur. In a coal-fired power plant, 65% of the mercury in the feed coal was emitted through the stack, while the remaining portion was associated with fly ash, bottom ash, and mill rejects. The concentration of mercury in the stack gas varied, with Hg0 being higher than Hg2+. The estimated mercury emission factor was higher due to the use of high ash coal and the lack of flue gas desulphurisation system.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2023)
Article
Environmental Sciences
Lipeng Han, Yi Zhao, Runlong Hao
Summary: This study investigates the characteristics of arsenic emissions and distribution in a typical Chinese coal-fired power plant renovated with ultra-low emission techniques. The results show that arsenic is mainly emitted in fly ash and can be efficiently absorbed and removed by air pollution control devices. Low-low temperature electrostatic precipitator, wet flue gas desulfurization, and selective catalytic reduction play important roles in reducing arsenic emissions. Overall, the ultra-low emission control technique has a significant effect on reducing arsenic emissions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Qing Ye, Yu Shen, Qi Zhang, Xi Wu, Wangbiao Guo
Summary: A life-cycle assessment was conducted to evaluate the energy conversion characteristics and environmental impacts of flue gas CO2 fixation by microalgae. The results indicate that improving CO2 aeration efficiency and microalgae growth rate are crucial for advancing this technology.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yali Tong, Kun Wang, Jiajia Gao, Tao Yue, Penglai Zuo, Chenlong Wang, Li Tong, Xiaoxi Zhang, Yun Zhang, Quanming Liang, Jieyu Liu
Summary: Coal-fired industrial boilers are a significant source of mercury emissions. This study assessed the mercury flow of these boilers in China, and established an inventory of mercury output from waste products. The findings showed that smaller boilers were the dominant source of mercury, and regions in North China, Northeast China, and Northwest China had high atmospheric mercury emissions.
AIR QUALITY ATMOSPHERE AND HEALTH
(2022)
Article
Environmental Sciences
Zhonggen Li, Xufeng Chen, Wenli Liu, Taishan Li, Guangle Qiu, Haiyu Yan, Mingmeng Wang, Ji Chen, Guangyi Sun, Qingfeng Wang, Xinbin Feng
Summary: This study indicates that emissions from coal-fired power plants have a noticeable impact on ambient GEM and agricultural soil THg levels in the vicinity, with approximately 3.9% of the discharged mercury accumulating in nearby soils. The low retention rate of total emitted mercury by soils is attributed to the high proportion of Hg-0 in stack gas emissions and the potential loss of Hg through reemission from soil surfaces.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Xiuwei Ma, Shouyuan Li, Yong Hou, Hao Lv, Jinjin Li, Tangying Cheng, Linjun Yang, Hao Wu
Summary: Activated carbon injection is an effective method for removing organic pollutants from coal-fired power plants, with aromatic hydrocarbons and oxygenated volatile organic compounds being the major components. The removal efficiency of organic pollutants is influenced by their physicochemical properties, and increasing the amount of AC injection can enhance the adsorption effect but decrease the adsorption capacity.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Applied
Wu Yang, Deepak Pudasainee, Rajender Gupta, Wei Li, Ben Wang, Lushi Sun
Summary: This study reveals the characteristics and composition of particulate matter generated from solid waste combustion, as well as the transformation of its mineral composition, which contributes to the understanding of the impact of solid waste combustion on the atmospheric environment.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Construction & Building Technology
Guangping Huang, Yunting Guo, Eric Bescher, Rajender Gupta, Wei Victor Liu
Summary: A numerical model was developed to predict the temperature profiles in BCSA cement-based mixtures used in permafrost regions, providing valuable guidance for future research and practical applications.
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2023)
Article
Energy & Fuels
Xiaoshuai Wang, Tengda Ma, Yuegang Tang, Rajender Gupta, Harold H. Schobert, Junying Zhang
Summary: This study investigates the thermal behavior of different structural types of coal pyrite and their influence on combustion products. The formation stages of coal pyrite are deduced from its structural types. Different behavior is observed among samples containing different types of pyrite during tube furnace combustion. The disappearance of pyrite peaks occurs at lower temperatures for samples with syngenetic and diagenetic pyrite compared to samples with epigenetic pyrite. The presence of different pyrite types affects slagging behavior differently.
Article
Chemistry, Physical
Wen Tan, Fan Yang, Zhouguang Lu, Zhenghe Xu
Summary: This study improves the electrochemical performance of carbon-coated silicon anodes by forming uniform carbon coatings with different degrees of graphitization. The high elasticity and high Li+ diffusion coefficient of the carbon coating greatly enhance the stability and rate capability of the electrode.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Lingfei Liu, Mingshan Zhang, Zhouguang Lu, Zhehui Jin, Yi Lu, Dejun Sun, Zhenghe Xu
Summary: This study investigates the impact of the molecular structure of pseudo-Gemini surfactants (PGS) on the stability and switchability of emulsions. The findings suggest that increasing the spacer length improves the interfacial activity, while introducing an amino group enhances the CO2 responsivity of PGS.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Review
Chemistry, Physical
Ben Wang, Rajender Gupta, Lei Bei, Qianmin Wan, Lushi Sun
Summary: This review provides an overview of research progress related to syngas quality, tar formation, and minerals transformation. It also describes the current technology under construction and commercial applications, as well as the challenges and prospects for commercial operation. The study highlights the importance of temperature, gasification agents, and steam to MSW ratio in syngas production, and discusses the different forms of tar in various atmospheres. The review also emphasizes the need for efficient catalysts, proper management of heavy metals, and the reduction of investment and operational costs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Ting Yao, Jisheng Long, Yufeng Duan, Rajender Gupta, Zhenghe Xu
Summary: In this study, alpha-MnO2 was supported onto silica coated magnetite nanoparticles (MagS-Mn) to investigate the adsorption and oxidation of Hg0 and the influence of SO2 and O2 on Hg0 removal. MagS-Mn exhibited a Hg0 removal capacity of 1122.6 mu g/g at 150 degrees C with the presence of SO2. The adsorption and oxidation efficiencies of Hg0 were 2.4% and 90.6%, respectively. The Hg0 removal capability decreased at higher temperatures.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Nimesha Rathnayake, Savankumar Patel, Ibrahim Gbolahan Hakeem, Jorge Pazferreiro, Abhishek Sharma, Rajender Gupta, Catherine Rees, David Bergmann, Judy Blackbeard, Aravind Surapaneni, Kalpit Shah
Summary: Co-pyrolysis technology is effective in reducing heavy metal concentration in biochar from biosolids. This study examined the effect of co-pyrolysis feedstock on product yield and properties by mixing biosolids with wheat straw and canola straw. The results showed that the feedstock ash content and volatile matter significantly affected the yields of biochar, oil, and gas during co-pyrolysis.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Parisa Niknejad, Seyed Mohammad Mirsoleimani Azizi, Kaitlin Hillier, Rajender Gupta, Bipro Ranjan Dhar
Summary: Despite the lack of information on the biodegradability of biodegradable disposables in high-solids anaerobic digestion, this study found that paper-based disposables were efficiently degraded while compostable plastic bags and utensils did not degrade well. However, hydrothermal liquefaction could transform undegraded plastic bags and utensils into biocrude, reducing the environmental risk of bioplastic pollution. Increasing the temperature in hydrothermal liquefaction also improved the yield and quality of biocrude. These findings contribute to the sustainable management and valorization of biodegradable disposables.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Engineering, Environmental
Savankumar Patel, Mojtaba Hedayati Marzbali, Ibrahim Gbolahan Hakeem, Ganesh Veluswamy, Nimesha Rathnayake, Kamrun Nahar, Shivani Agnihotri, David Bergmann, Aravind Surapaneni, Rajender Gupta, Abhishek Sharma, Kalpit Shah
Summary: Anaerobic digestion is widely used in wastewater treatment to degrade organic contaminants and produce biogas. This study explores the use of biosolids-derived biochar as catalysts for biogas decomposition to generate hydrogen and carbon nanomaterials. The biosolids-derived biochar showed high CH4 and CO2 conversion rates due to the presence of amorphous carbon on its surface. Morphological analysis revealed the formation of carbon nanospheres and carbon nanofibres. Furthermore, the CNM-loaded biochar demonstrated efficient removal of PFAS from contaminated wastewater. This research showcases an integrated approach for upcycling waste streams in wastewater treatment facilities.
Article
Construction & Building Technology
Jian Zhao, Guangping Huang, Yunting Guo, Rajender Gupta, Wei Victor Liu
Summary: This study explores the feasibility of using recycled carbon black (RCB) derived from scrapped off-the-road (OTR) tires, denoted as RCB-OTR, as aggregates in thermal insulation mortars. The results show that mortars with RCB-OTR exhibit good thermal insulation performance and satisfactory mechanical properties. The study contributes to the development of eco-friendly thermal insulation building materials and offers a solution for disposing of waste OTR tires in the mining industry.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Xiaoshuai Wang, Tengda Ma, Yuegang Tang, Rajender Gupta, Harold H. Schobert, Junying Zhang
Summary: The behavior of 12 trace elements associated with pyrite during heat treatment was investigated. Nickel, Cu, Zn, Cr, and Cd were found to be enriched in samples containing syngenetic pyrite, while other elements were more enriched in samples containing epigenetic pyrite. The volatilization of highly volatile elements like Hg and As was complete at high temperatures, while other elements showed different levels of volatilization in different samples. The elements were classified into low, medium, or high volatility groups based on their volatilization behavior.
Article
Chemistry, Analytical
Ibrahim Gbolahan Hakeem, Pobitra Halder, Savankumar Patel, Abhishek Sharma, Rajender Gupta, Aravind Surapaneni, Jorge Paz-Ferreiro, Kalpit Shah
Summary: Pre-treatment of biosolids can reduce the negative impact of inorganic matter during pyrolysis, leading to higher yield and quality of pyrolysis products. The removal of ash-forming elements improves organic matter devolatilization, resulting in higher bio-oil and lower biochar production. Pre-treatment also enhances biochar properties, increasing fixed carbon content, calorific value, fuel ratio, specific surface area, and porous structure formation.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Engineering, Environmental
Mojtaba Hedayati Marzbali, Ibrahim Gbolahan Hakeem, Graeme Short, Aravind Surapaneni, Rajender Gupta, Kalpit Shah
Summary: This study investigated the continuous adsorption of ammonium from wastewater using biochar and cation exchange resin. The adsorption capacity and performance were compared between the two materials. The study suggested using biochar to obtain N-laden biochar and then treating the resulting effluent with resin columns for complete removal of ammonium.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Yunhui Hua, Zhenghe Xu, Baojun Zhao, Zuotai Zhang
Summary: An electrochemical approach was developed to evaluate redox abilities and a salt leaching method using water-soluble NH4Fe(SO4)(2) as a redox intermediate was proposed for the synergistic recovery of valuable metals from spent lithium-ion batteries, achieving high efficiency and selectivity.
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.