Article
Materials Science, Paper & Wood
Feixiang Xu, Jiangchen Luo, Liqun Jiang, Zengli Zhao
Summary: This study improved the production of levoglucosan and levoglucosenone from acid-impregnated cellulose through fast pyrolysis. The impregnation of acid reduced the activation energy and reaction temperature, significantly increasing the yield of levoglucosan. The study demonstrated the potential for industrial production of levoglucosan and levoglucosenone from cellulose at low temperatures.
Article
Energy & Fuels
Takashi Nomura, Hinano Mizuno, Eiji Minami, Haruo Kawamoto
Summary: The study evaluated fast pyrolysis of cellulose using infrared heating under nitrogen flow, achieving a maximum yield of 52.7% levoglucosan under optimized conditions. Increasing cellulose temperature through slow nitrogen flow and high IR power level resulted in higher gas yield, with the formation of CO serving as an indicator of LG gasification. Glycolaldehyde was identified as a major byproduct, with its yield remaining relatively constant across all conditions.
Article
Thermodynamics
Kai Wu, Bingbing Luo, Han Wu, Min Chen, Yihan Wang, Zefeng Ge, Sheng Chu, Qingyu Liu, Huiyan Zhang
Summary: A novel two-stage process based on NaOH-Fenton pretreatment coupled with fast pyrolysis was proposed to improve the yield of target chemicals and achieve effective concentration and removal rates of nitrogen and sulfur. The process successfully converted grass biowaste into value-added chemicals and liquid fuels.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Jinxiu Cao, Sui Boon Liaw, Yu Long, Yun Yu, Hongwei Wu
Summary: This study aims to understand the fundamental reaction mechanisms during fast pyrolysis of acid-impregnated cellulose, showing how different temperatures affect the formation of key compounds in the reaction intermediates and primary volatiles. The results indicate that acid impregnation reduces the onset reaction temperature of cellulose pyrolysis, leading to the production of different major products at varying temperatures. The study also suggests that condensation reactions play an important role during acid-catalysed cellulose pyrolysis, with char formation becoming the favored pathway at higher temperatures.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Energy & Fuels
Guangqing Zhu, Shi'en Hui, Yanqing Niu, Yaqian Kang, Yuan Lv
Summary: Pulverized coal (PC) pyrolysis plays a crucial role in coal thermal conversion and utilization. The investigation of nitrogen migration in coal combustion is based on the transformation of fuel-N into fast pyrolysis. In this study, a wire mesh reactor was used to analyze the initial decomposition processes and understand the final pyrolysis yield and composition distribution. Additionally, the initial pyrolysis characteristics of PC with different ash contents were compared. The results revealed that the pyrolysis ratio increased with the temperature and the high heating rate led to a higher pyrolysis ratio compared to the low heating rate. The char-N yield decreased initially with the increase in temperature and then reached stability, with the majority of nitrogen remaining in the char. Furthermore, an increase in heating rate resulted in a shift of the pyrolysis zone towards higher temperatures and increased yields of volatile and tar, as well as the proportion of tar in volatile. The NH3 yield was higher than HCN, especially at high heating rates. The content of N-6 showed a positive correlation with the coal pyrolysis ratio.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Materials Science, Paper & Wood
Fan Zhang, Lujiang Xu, Feixiang Xu, Liqun Jiang
Summary: Mild acid pretreatment before fast pyrolysis of lignocellulose can improve levoglucosan yield and potentially overcome technical barriers for efficient saccharification. This study offers a novel and cost-effective strategy for industrial bio-refinery to selectively saccharify lignocellulose.
Article
Energy & Fuels
Liqun Jiang, Jiangcheng Luo, Feixiang Xu, Le Qian, Yitong Wang, Hu Li, Zhen Fang
Summary: This study achieved high yields of levoglucosan (LG) from cellulose pyrolysis using acid-base bifunctional magnetic Zn-Fe-C catalysts. The tested catalyst Zn-4@Fe-C-500 increased LG yield by 5.4 times and lowered the reaction temperature by 200 C through acid-base site synergistic effect. Moreover, the LG yield from catalytic cellulose pyrolysis at 300 C was much higher than that without catalyst at 500 C. The Zn4@Fe-C500 catalyst exhibited high recyclability. This study demonstrated great potential for industrial production of LG from cellulose at low temperatures.
Article
Chemistry, Analytical
Colin Plouffe, Chad A. Peterson, Sean A. Rollag, Robert C. Brown
Summary: With appropriate pretreatment, sugars can be a major product from fast pyrolysis of lignocellulosic biomass. However, secondary reactions of vaporized levoglucosan in the presence of untreated biochar can significantly reduce sugar yields. Changes in reactor design and operation can help minimize these reactions and increase sugar yields.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Applied
Xin Huang, Shinji Kudo, Shusaku Asano, Jun-ichiro Hayashi
Summary: This study found that using DMSO as a solvent in combination with Amberlyst 70 as a solid acid catalyst can significantly increase the yield of LGO, with further improvement achieved by in-situ removal of water. Additionally, experiments using bio-oil as feedstock showed that heavier saccharides can also serve as a source of LGO without inhibiting the conversion of LGA.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Shogo Kumagai, Yusuke Takahashi, Tomohito Kameda, Yuko Saito, Toshiaki Yoshioka
Summary: This study discusses the applicability of a Py-GC/FID system using naphthalene as the internal standard for quantifying pyrolyzates during slow pyrolysis of cellulose. The method achieved high yield recovery of levoglucosan, attributed to the suppression of repolymerization in the system. This improved quantification of primary pyrolysis products during slow pyrolysis and can potentially be applied to other polymeric materials.
Article
Energy & Fuels
Amin Osatiashtiani, Jiajun Zhang, Stylianos D. Stefanidis, Xiaolei Zhang, Anthony V. Bridgwater
Summary: This study investigates the decomposition mechanism of the key cellulose pyrolysis intermediate, levoglucosan, in biomass catalytic fast pyrolysis. Experimental results show that furan and furfural are key intermediates in the formation of aromatic hydrocarbons. Theoretical modelling reveals a direct pathway from levoglucosan to furan without furfural as an intermediate.
Article
Engineering, Environmental
Jun Zhang, Jing Gu, Haoran Yuan, Yong Chen
Summary: This study investigates the catalytic fast pyrolysis of waste mixed cloth using hierarchical HZSM and commercial CaO. The use of HZSM contributed to the production of monocyclic and dicyclic chemicals, while CaO showed strong deoxygenation performance for the transformation into low oxygen-containing chemicals. This research highlights a feasible route for upgrading waste mixed cloth into value-added chemicals.
Article
Chemistry, Analytical
Anqing Zheng, Qi Wang, Shijun Liu, Zhen Huang, Guoqiang Wei, Kun Zhao, Shuang Wang, Zengli Zhao, Haibin Li
Summary: A selective sequential fractionation protocol was developed to quantify the effects of individual components on biomass fast pyrolysis, revealing that inhibiting the catalytic effects of ash and selective removal of lignin are key factors determining levoglucosan yield.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Analytical
Jhoan F. Tellez, Mariana P. Silva, Rachael Simister, Leonardo D. Gomez, Valeria C. Fuertes, Juan M. De Paoli, E. Laura Moyano
Summary: Experimental results showed that the highest oil yield was obtained from hydrochloric acid-leached rice husk at 400 degrees Celsius, with the main product being Levoglucosan (LG).
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Multidisciplinary
Fuat Sakirler, M. Doga Tekbas, Hsi-Wu Wong
Summary: This study reveals the catalytic and inhibitory effects on cellulose fast pyrolysis induced by noncovalent interactions (NCIs) caused by molten plastics. Different functional groups in plastics catalyze or inhibit key cellulose pyrolysis pathways, leading to increased selectivity towards bio-based chemicals. This discovery offers insights and opportunities for tuning cellulose fast pyrolysis via NCIs using molten plastic catalysts or inhibitors.
Article
Engineering, Environmental
Jie Yu, Dingshun Wang, Zhao Zeng, Lushi Sun
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2019)
Article
Green & Sustainable Science & Technology
Chuan Ma, Qianqian Yan, Jie Yu, Tao Chen, Dingshun Wang, Sheng Liu, Kagiso Bikane, Lushi Sun
JOURNAL OF CLEANER PRODUCTION
(2019)
Article
Energy & Fuels
Jie Yu, Esong Zhang, Lele Wang, Zijian Song, Fanhai Kong, Yunlong Ma, Hong Zhao, Lushi Sun
Article
Environmental Sciences
Tao Chen, Jie Yu, Chuan Ma, Kagiso Bikane, Lushi Sun
Article
Chemistry, Multidisciplinary
W. Jin, L. Pastor-Perez, Jie Yu, J. A. Odriozola, S. Gu, T. R. Reina
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2020)
Article
Energy & Fuels
Xin Wei, Jie Yu, Jiaxing Du, Lushi Sun
Summary: This study investigated the pyrolysis behavior of polycarbonates under nonisothermal and isothermal conditions using a combination of ReaxFF-MD simulation and density functional theory. Three different stages of pyrolysis processes were identified under nonisothermal conditions, while the influence of temperature on char decomposition into gas and liquid was analyzed under isothermal conditions. The results indicated that different pyrolysis products were generated from specific groups within the polycarbonates, providing insight into the mechanisms involved in the pyrolysis process.
Article
Energy & Fuels
Jie Yu, Dingshun Wang, Lushi Sun
Summary: The study revealed different reactivities and product distributions of various lignin samples during pyrolysis, with temperature and heating rate playing significant roles. Interactions between lignin and biomass components promoted the formation of phenolic compounds while inhibiting the formation of dimer compounds.
Article
Engineering, Environmental
Lushi Sun, Tao Chen, Cailing Ba, T. R. Reina, Jie Yu
Summary: This study demonstrates a cost-effective strategy for capturing elemental mercury using bamboo saw dust and bromine flame retardant sorbents, prepared by a novel hydrothermal-pyrolysis method. The optimal conditions of bamboo/BFR ratio, hydrothermal temperature, and pyrolysis temperature result in highly efficient removal of elemental mercury with a 99% removal efficiency. Additionally, the C-Br groups in the sorbents play a key role in oxidizing Hg0 into HgBr2.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Aderlanio Cardoso, Laura Pastor-Perez, Tomas Ramirez Reina, Isabel Suelves, Jose Luis Pinilla, Klaus Hellgardt, Marcos Millan
Summary: A one-pot catalyst synthesis method has been developed for Ni-CeO2-x supported on carbon nanofibers, allowing for the conversion of Kraft lignin in supercritical water with a high yield of 79% bio-oil, primarily composed of monoaromatics. This approach achieved lignin breakdown without the need for noble metal catalysts, molecular H-2, or cosolvents, resulting in reduced catalyst synthesis time and unit operations and a desirable yield of a chemically uniform product fraction.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Engineering, Environmental
Kagiso Bikane, Jie Yu, Ravi Shankar, Xiangyi Long, Nigel Paterson, Marcos Millan
Summary: This study investigates the gasification kinetics of Morupule coal in atmospheric pressure CO2 and the structural evolution of residual chars. The research shows that gasification reaction rates are high, with little impact on the bulk chemical structure of chars but significant changes in surface chemistry. Residual chars from gasification experiments exhibit lower combustion reactivity compared to chars produced under inert pyrolysis conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Lei Bei, Yang Han, Lei Qiao, Kagiso Bikane, Jie Yu, Lushi Sun
Summary: This study investigated the pyrolysis of natural rubber under H2S atmosphere, revealing the interaction between H2S and intermediates from NR decomposition to form sulfur-containing substances, and the catalytic adsorption of H2S by various catalysts, with zinc showing the best desulfurization effect.
Article
Energy & Fuels
Linlin Xu, Jie Yu, Gan Wan, Lushi Sun
Summary: The emission characteristics of 16 PAHs from atomization combustion of five types of used mineral oil and two types of base oil were investigated. Results showed that higher temperatures and excess air ratios can efficiently reduce PAH emissions, with 2- and 3-ring PAHs dominating the total emissions. The study also found that the influence of temperature on PAH emissions can be weakened at high excess air levels.
Article
Energy & Fuels
Yang Han, Jie Yu, Tao Chen, Xiaotian Liu, Lushi Sun
Summary: The introduction of Zn species into zeolites can enhance the selectivity of aromatic hydrocarbons in NR pyrolysis products, especially BTEX, but excessive Zn loading has a negative effect. Zn/ZSM5 catalyst prepared by ion-exchange method showed higher selectivity towards BTEX due to more Zn species existed in the form of divalent zinc ions.
JOURNAL OF THE ENERGY INSTITUTE
(2021)
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.