Article
Chemistry, Applied
Poulami Roy, Hossein Jahromi, Tawsif Rahman, Jonas Baltrusaitis, El Barbary Hassan, Allen Torbert, Sushil Adhikari
Summary: This study explores the synergistic effect of blending pyrolysis oil with triglycerides for hydrotreatment using different catalyst supports. It is found that biochar-supported catalysts exhibit better hydrodeoxygenation (HDO) activity, with lower coke formation and higher removal of oxygen via dehydration. Furthermore, blending pyrolysis oil with poultry fat results in better pyrolysis bio-oil quality and a higher percentage of jet fuel fraction compared to carinata oil.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Athanasios Dimitriadis, Loukia P. Chrysikou, George Meletidis, George Terzis, Milos Auersvald, David Kubicka, Stella Bezergianni
Summary: This study investigated the upgrading of pyrolysis bio-oil through mild hydrotreatment, finding that the longest catalyst life was achieved under specific operating conditions. Furthermore, several properties of the initial bio-oil were improved during the upgrading process.
Article
Agricultural Engineering
A. Dimitriadis, D. Liakos, U. Pfisterer, M. Moustaka-Gouni, D. Karonis, S. Bezergianni
Summary: This study found that hydrotreated pyrolysis oil can be miscible with different petroleum streams, and in some cases can even improve fuel characteristics, potentially allowing for its integration in oil refineries.
BIOMASS & BIOENERGY
(2021)
Article
Chemistry, Applied
A. A. Smirnov, M. Alekseeva, A. N. Grachev, O. O. Zaikina, S. A. Selishcheva, O. A. Bulavchenko, M. Shashkov, Yu A. Chesalov, V. A. Yakovlev
Summary: Hydrotreatment of birch wood pyrolysis liquid was conducted using Ni-based catalysts stabilized by SiO2, with the addition of Cu, Mo, Cr, and P additives for modification. MoCr-containing system showed higher yield of the aqueous phase and lower O/C ratio, while P-modified catalysts exhibited more intense CO2 formation and reduced oxygen content in the organic phase. The catalysts were characterized by various methods to evaluate their performance and stability.
Article
Chemistry, Applied
Wang Yin, Hanwen Gu, Monique Bernardes Figueiredo, Shuqian Xia, Robertus Hendrikus Venderbosch, Hero Jan Heeres
Summary: The study focused on catalytic hydrotreatment of fast pyrolysis liquids from lignocellulosic biomass using different types of Raney nickel catalysts, with Mo-promoted Ra-Ni catalyst showing the highest hydro-(deoxy)genation activity and lowest charring tendency of the product oil. The analyses of product oils revealed the presence of a significant amount of phenolics, indicating the potential of commercially available Raney nickel catalysts, particularly the Mo-promoted ones, for mild hydrotreatment of pyrolysis liquids.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Energy & Fuels
Jiashun Hu, Xuanying Chen, Xiaoxue Yang, Ruosong Li, Le Wu
Summary: As bio-energy is the only carbon-containing renewable energy source, its development and utilization are crucial to addressing the energy crisis and the greenhouse effect. In order to reduce the production cost of bio-fuels, bio-oil derived from biomass and algae can be co-processed with vacuum gas oil in an existing catalytic cracking unit, resulting in the production of gasoline and diesel products with renewable carbon. Techno-economic analysis revealed that the co-processing scenario involving hydrothermal liquefaction provided a clear economic advantage.
Article
Chemistry, Applied
Huaizhou Yang, Paul de Wild, Ciaran W. Lahive, Zhiwen Wang, Peter J. Deuss, Hero J. Heeres
Summary: Fast pyrolysis and catalytic hydrotreatment were combined to upgrade pyrolysis oils, resulting in liquid products with improved properties and enriched in valuable low molecular weight chemicals, particularly alkylphenols. It was found that the type of biomass had limited impact on the yields of liquid products and alkylphenols, indicating the feedstock flexibility of this integrated concept.
FUEL PROCESSING TECHNOLOGY
(2022)
Review
Agricultural Engineering
Shinyoung Oh, Jechan Lee, Su Shiung Lam, Eilhann E. Kwon, Jeong-Myeong Ha, Daniel C. W. Tsang, Yong Sik Ok, Wei-Hsin Chen, Young-Kwon Park
Summary: Recent studies have shown that fast hydropyrolysis is a promising technology for converting biomass into liquid fuels, producing more aromatic hydrocarbons and reducing the oxygen content of bio-oil. Current research focuses on both non-catalytic and catalytic fast hydropyrolysis processes, as well as efforts to combine fast hydropyrolysis with hydrotreatment processes. Future research directions and challenges in fast hydropyrolysis are also discussed.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Fanghua Li, Daniel J. Sweeney, Yanjun Dai, Chi-Hwa Wang
Summary: This study focused on converting algal biomass into bio-oil using Ni2P-loaded zeolite as a catalyst to achieve high-quality bio-oil production. The results showed improved bio-oil quality, reduced oxygen and nitrogen containing compounds, and increased biochar surface area in the presence of the catalyst. According to the proposed catalytic mechanism, the direct addition reactions were the dominant pathway in the formation of liquid hydrocarbons.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Energy & Fuels
Dmitry A. Sukhorukov, Roman G. Kukushkin, Maria V. Alekseeva (Bykova), Olga A. Bulavchenko, Olesya O. Zaikina, Mikhail E. Revyakin, Maxim O. Kazakov, Vadim A. Yakovlev
Summary: This paper focuses on upgrading sewage sludge-derived pyrolysis oil through hydrotreatment using catalysts. The results show that effective heteroatom removal can be achieved, especially with the NiMoPS/Al2O3 catalyst at 400 degrees C. Additionally, the catalysts used in the process accumulate certain impurities, indicating the importance of selecting appropriate catalysts and construction materials for further study.
Article
Biochemistry & Molecular Biology
Warintorn Banchapattanasakda, Channarong Asavatesanupap, Malee Santikunaporn
Summary: This article describes the use of activated carbon as a catalyst for the conversion of waste cooking oil into valuable hydrocarbon fuels through a lab-scale pyrolysis process. The experiments showed that under optimal temperature and activated carbon dosage conditions, a high yield of bio-oil with good quality can be obtained, making it suitable for use as a liquid bio-fuel.
Article
Agricultural Engineering
Qiuhao Wu, Letian Zhang, Linyao Ke, Qi Zhang, Xian Cui, Liangliang Fan, Anqi Dai, Chuangxin Xu, Qihang Zhang, Krik Bob, Rongge Zou, Yuhuan Liu, Roger Ruan, Yunpu Wang
Summary: This study found that the residue content of oil-bath co-torrefaction was the highest at 97.01%. Oil-bath co-torrefaction can maximize the retention of hydrogen atoms in corncob, which is beneficial for deoxygenation during pyrolysis. It can also reduce the average activation energy required for corncob decomposition.
BIORESOURCE TECHNOLOGY
(2023)
Article
Energy & Fuels
Elham Nejadmoghadam, Abdenour Achour, Pouya Sirous-Rezaei, Muhammad Abdus Salam, Prakhar Arora, Olov Ohrman, Derek Creaser, Louise Olsson
Summary: This study investigates the thermal and catalytic hydrotreatment of a simulated pyrolysis oil and compares the effects of reaction conditions and different oxygenated organic compounds on product yields and properties. It finds that the presence of oxygenated furan and sugar compounds significantly affects the yield of liquid product and promotes solid formation. Stabilizing furan, especially with attached carbonyl groups and sugar derivatives, is important for improving upgrading efficiency in pyrolysis oil.
Article
Multidisciplinary Sciences
Nattawut Khuenkaeo, Sanphawat Phromphithak, Thossaporn Onsree, Salman Raza Naqvi, Nakorn Tippayawong
Summary: The use of ablative pyrolysis under vacuum to convert tobacco residues into bio-oils has shown promising results, producing high-quality oils mainly composed of alkanes, benzene derivatives, and nitrogen-containing compounds. This process can effectively convert pyrolysis products into liquid fuels with high carbon, hydrogen, and calorific value.
Article
Biotechnology & Applied Microbiology
Rubia Idris, William Woei Fong Chong, Atikah Ali, Sidah Idris, Mohd Faizal Hasan, Farid Nasir Ani, Cheng Tung Chong
Summary: In this study, oil palm empty fruit bunch (EFB) was subjected to microwave-induced fast pyrolysis, and it was found that the addition of activated carbon as a microwave susceptor significantly increased the bio-oil yield, resulting in bio-oil enriched with phenolic compounds. This promising method shows potential for producing highly selective mono-phenol rich bio-oil from biowaste.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Applied
Jaroslav Aubrecht, Violetta Pospelova, Oleg Kikhtyanin, Martin Vesely, David Kubicka
Summary: Supported copper catalysts are a promising alternative to replace CuCr catalysts in ester hydrogenolysis. This study investigates the effect of support properties on copper nanoparticles formation and the final hydrogenolysis performance. It is found that ZrO2 and alumina supports ensure good copper dispersion and achieve better catalytic performance. The number of acid-base sites affects the HDOL selectivity.
Article
Chemistry, Physical
Valeriia Korolova, Oleg Kikhtyanin, Francisco Ruiz-Zepeda, Miloslav Lhotka, Martin Vesely, David Kubicka
Summary: This study investigated the properties and catalytic performance of MgAl hydrotalcites under repetitive calcination-rehydration treatments, revealing the importance of complete rehydration and efficient reincorporation of Al species for maximizing catalytic activity.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Oleg Kikhtyanin, David Kubicka
Summary: Deoxygenation of aliphatic acids to hydrocarbons is crucial for producing sustainable aviation fuel (SAF). The performance differences between Ni and Co catalysts, both promising deoxygenation catalysts, have not been explained. In this study, lauric acid and its reaction intermediates were examined to understand the differences between Ni/Al2O3 and Co/Al2O3 catalysts. It was found that Co/Al2O3 was more efficient in hydrogenation and hydroconversion, while Ni/Al2O3 excelled in hydrogenation and decarbonylation. The results provide insights into the rational design of deoxygenation catalysts for aliphatic acid valorization into SAF components.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Applied
Valeriia Korolova, Oleg Kikhtyanin, Evgeniya Grechman, Vincenzo Russo, Johan Warna, Dmitry Yu. Murzin, David Kubicka
Summary: The influence of temperature, furfural to acetone ratio, and catalyst loading on the furfural condensation with acetone over hydrotalcite materials was studied. Concentration profiles showed limiting conversion values depending on the catalyst amounts, and thermodynamic calculations demonstrated the absence of any thermodynamic restrictions, indicating catalyst deactivation, especially at lower catalyst concentrations. Deactivation is more likely to affect the first step of aldol condensation rather than subsequent dehydration. A kinetic model, including catalyst deactivation, was developed and confirmed an adequate description of the experimental data with the advanced model.
Article
Engineering, Environmental
Petr Straka, Milos Auersvald, Dan Vrtiska, Hugo Kittel, Pavel Simacek, Petr Vozka
Summary: The hydrotreating of scrap tires pyrolysis oil over commercial Ni-Mo/Al2O3 catalyst was investigated to produce high-quality alternative transportation fuel components. Despite the initial high content of olefins, aromatics, sulfur, and nitrogen, the fuel components obtained after hydrotreating met most fuel specifications. The different fractions of the oil can be used as gasoline, jet fuel, diesel, and marine fuel components by applying additional treatments or blending methods.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Bogdan Shumeiko, Milos Auersvald, Dan Vrtiska, Petr Straka, Pavel Simacek, Ivo Svetlik, Stella Bezergianni, David Kubicka
Summary: Utilization of waste lignocellulosic biomass for high-quality fuel production is crucial for achieving carbon neutrality. A novel bio-oil hydroprocessing strategy involving bio-oil stabilization, fractionation, and co-processing with refinery processes was proposed. By co-hydrocracking the stabilized bio-oil distillation residue with vacuum gas-oil, liquid transportation fuels with increased biogenic carbon content were produced, significantly reducing fossil CO2 emissions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
J. Aubrecht, D. . Kubicka
Summary: This paper provides an overview of the scientific results achieved in the development of a sustainable hydrogenolysis catalyst. It discusses the effects of various synthesis methods and their parameters, as well as the impact of different promoters and supports on the catalyst's structure, activity, and selectivity in the hydrogenolysis of dimethyl adipate. From a green chemistry perspective, a suitable alternative to the Adkins catalyst was discovered at the laboratory scale.
Article
Energy & Fuels
Hugo Kittel, Katerina Chrudimska, Daniel Kadlecek, Martin Psenicka, Pavel Simacek
Summary: The objective of this study was to re-distill hydrocracked kerosene and determine the dependence of jet fuel parameters on the mean boiling point of the cuts. The properties of the analyzed cuts deteriorated with increasing mean boiling point, and cuts with higher mean boiling points did not meet jet fuel specifications. Aromatics were found to be crucial in controlling the distillation range, and the low freezing point characteristic of the narrow cuts resulted in a synergy when blended with other kerosene. This research provides new insights into the characteristics of hydrocracked kerosene.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Hugo Kittel, Jiri Horsky, Pavel Simacek
Summary: The popularity of air transport is increasing due to its speed, comfort, and extensive network. This has led to a high demand for jet fuel, which is also facing scrutiny for its impact on the environment. To address this issue, it is necessary to blend alternative petroleum fractions with sustainable aviation components in oil refineries. Different samples of alternative jet fuel were tested for their specific properties and compared to standard Jet A-1 kerosene. The properties varied significantly, but correlations were found, indicating potential synergies in blending these components.
Article
Engineering, Environmental
Kuntawit Witthayolankowit, Alessandro Marson, Kiran Reddy Baddigam, Daria Lebedeva, Manzoorahmed Shaikh, Anuja Kane, Deepika Gupta, Maria Ivarsson Wide, Aji P. Mathew, David Kubicka, Alessandro Manzardo, Joseph S. M. Samec
Summary: To achieve a viable forest-based biorefinery, both the carbohydrate and lignin parts of the raw material should be valorized. This study successfully converted softwood lignin into valuable monophenols and utilized the carbohydrate portion to produce cellulose fibers and biofuels, achieving efficient utilization of forestry waste.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Michal Siman, Vojtech Krupka, Lukas Kejla, Petr Straka, Tim Schulzke, Juliano Souza dos Passos, Patrick Biller, Milos Auersvald
Summary: Accurate determination of carbonyl content in bio-oils is crucial for the storage stability and the design of hydrotreatment process. However, the commonly used Faix method may underestimate carbonyl content in protein-rich biomass oils due to nitrogen interference. This study identifies nitrogen interferences and introduces a correction step to mitigate underestimation, which is particularly important for bio-oils with high nitrogen content.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Physical
Mahashanon Arumugam, Amin Osatiashtiani, Ka-Lun Wong, Khairul Basyar Baharudin, Sin Yuan Lai, M. Safa-Gamal, Hwei Voon Lee, Chaw Jiang Lim, David Kubic, Yun Hin Taufiq-Yap
Summary: In this study, hierarchical nanozeolites were synthesized for the hydrodeoxygenation of oleic acid to diesel-range hydrocarbons. The nanozeolites were based on HZSM-5 and HBEA and had appropriate mesopores. The catalysts showed high conversion of oleic acid and excellent stability, making them promising for efficient hydrotreatment of bulky substrates.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Mahashanon Arumugam, Oleg Kikhtyanin, Amin Osatiashtiani, Veronika Kyselova, Vlastimil Fila, Iva Paterova, Ka-Lun Wong, David Kubicka
Summary: The present study develops a prominent base catalyst for the aldol condensation of furfural and acetone. The catalyst shows high furfural conversion and selectivity to desired products. Despite some limitations, the catalytic performance can be improved through future investigations.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Engineering, Environmental
Chunxiu Yang, Wei Wang, Dongjun Wang, Mingyue Gong, Ying Xin, Linfei Xiao, Oleg V. Kikhtyanin, David Kubicka, Wei Wu
Summary: This study successfully designed NiMo/MgAl2O4 catalysts for the hydrodeoxygenation of methyl palmitate, and the introduction of MoOx species improved the catalytic performance and stability, resulting in higher hexadecane yield and less carbon emission.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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.
