Article
Energy & Fuels
Deming Zhang, Libo Lu, Yifei Ren, Hui Jin, Wenwen Wei, Zening Cheng, Liejin Guo
Summary: This study investigated the impact of NaAlO2 on K2CO3-catalyzed coal gasification and found that the addition of NaAlO2 can inhibit ash agglomeration, reduce the volatility of alkali metals, and improve carbon gasification efficiency.
Article
Energy & Fuels
Mei Yangang, Zhang Qian, Wang Zhiqing, Gao Songping, Fang Yitian
Summary: This research reveals the migration modes between Na2CO3 particles and coal char at high temperature using an in-situ heating stage microscope, and evaluates the effects of this migration on catalytic gasification and catalyst loading.
Article
Thermodynamics
Xu Zhao, Changsheng Bu, Xinye Wang, Jubing Zhang, Guilin Piao, Yong Jiang
Summary: Gasification reactivity of high-AFT coal increases with temperature, and the RPM model fits experimental results better. To minimize ash fusion and coal ash agglomeration during non-slagging gasification of Huainan coal, a temperature of 1200 degrees C is recommended.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Xiangyu Li, Zhiqing Wang, Ru Feng, Jiejie Huang, Yitian Fang
Summary: The technology of extracting alumina from coal ash provides a way to reuse coal-based solid waste, but the challenge lies in the harmless treatment of alumina-extracted residue. By functionalizing the residue, it can serve as a potential sorbent for CO2, showing enhanced adsorption performance.
Article
Energy & Fuels
Hao Lu, Baozi Peng, Zefeng Ge, Jin Bai, Lingxue Kong, Huaizhu Li, Zhen Liu, Zongqing Bai, Wen Li
Summary: The study revealed that the viscosity and crystallization behavior of slag are mainly influenced by chemical composition, with the ratio of acid/basic oxides and SiO2/Al2O3 ratio playing a key role. Additionally, the Ca/Fe ratio in the liquid phase is an important factor affecting slag viscosity and crystallization.
Article
Energy & Fuels
Weiwei Zhang, Youqing Wu, Sheng Huang, Xiao Wei, Xueqin Li, Shiyong Wu
Summary: This study investigates the ash fusion characteristics and gasification reactivity of wheat straw blended with rice husk and wood dust. The results show that both rice husk and wood dust can enhance the ash fusion temperatures of wheat straw, and the presence of synergistic effect and reduction of activation energy were observed in the co-gasification processes.
Article
Energy & Fuels
Xiwen Yao, Jianyu Mao, Li Li, Lu Sun, Keqiang Xu, Xingzong Ma, Yonglu Hu, Zhicheng Zhao, Shoukun Chen, Kaili Xu
Summary: This study investigated and compared the characteristics of fly and bottom ashes from an industrial gasification plant for biomass syngas production. Results showed that fly ashes have smaller particle sizes, higher contents of potassium, sulphur, and chlorine, while bottom ashes differ in fusibility, base-to-acid ratio, and fouling index. Rational control of operating temperature could help reduce ash deposition/agglomeration.
Article
Energy & Fuels
Muhammad Assad Munawar, Asif Hussain Khoja, Muhammad Hassan, Rabia Liaquat, Salman Raza Naqvi, Muhammad Taqi Mehran, Ali Abdullah, Faisal Saleem
Summary: Biomass ash showed promising catalytic activity in methane decomposition, with improved fusion temperature after modification with CeO2 nanoparticles. Biomass fly ash demonstrated good physicochemical properties, making it suitable for catalytic fuel processing applications.
Article
Thermodynamics
Yongwei Wang
Summary: The content of sodium and calcium in coal ash compounds affects the ash fusion temperatures (AFTs) of Zhundong coal. Pretreatment with water leaching and hydrochloric acid leaching can enhance AFTs. AFTs decrease first and then increase with the loading of Na2CO3 and addition of CaO.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Yangang Mei, Qian Zhang, Zhiqing Wang, Songping Gao, Yitian Fang
Summary: This paper investigates the separation and utilization of catalytic gasification ash (CGA) using different methods. By adding Na2CO3 and Ca(OH)2, the recovery of Al and Na is successfully achieved, and materials with unique morphology and characteristics are synthesized.
Article
Energy & Fuels
Chuandong Ma, Xiaoteng Li, Jianqiao Lyu, Meng He, Zhenhua Wang, Lin Li, Xiaofang You
Summary: The effects and mechanisms of CGFS-CWS preparation, combustion, and ash fusion were investigated. Increasing CGFS content led to higher slurry viscosity but improved slurry stability. The improved stability was attributed to the stronger negative charge on the CGFS surface, facilitating particle dispersion. Combustion experiments showed that CGFS incorporation significantly lowered the burnout temperature and increased the maximum combustion rate of the slurry. Addition of CGFS also reduced the ash fusion temperature by promoting melting-assisting effects.
Article
Chemistry, Physical
Yin Xu, Jeremy Dhainaut, Jean-Philippe Dacquin, Anne-Sophie Mamede, Maya Marinova, Jean-Francois Lamonier, Herve Vezin, Hui Zhang, Sebastien Royer
Summary: A-site substituted perovskites were prepared and evaluated for formaldehyde oxidation, with La0.8K0.2MnO3 showing the highest catalytic activity. Stability tests revealed gradual deactivation of the catalysts under dry conditions, while the addition of humidity in the gas stream led to reduced deactivation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Green & Sustainable Science & Technology
Jie Li, Guozhang Chang, Ke Song, Bolun Hao, Cuiping Wang, Jian Zhang, Guangxi Yue, Shugang Hu
Summary: This study investigated the effect of CBA additives as bed material in gasification process on the characteristics of tar catalytic reforming and biochar/steam gasification reactivity. The results showed that the CBA additive exhibited good catalytic performance for tar cracking and gas upgrading. The addition of CBA reduced the activation energy of the gasification process and improved the reactivity of the biochar.
Article
Thermodynamics
Hongli Fan, Fenghai Li, Meiling Xu, Mingxi Guo, Qianqian Guo, Guopeng Han
Summary: The combined study of ash fusion temperature adjustment and gasification reactivity change provides valuable reference for biomass utilization. Jincheng coal fine char (JF) was found to effectively increase the ash fusion temperatures of peanut hull and cotton stalk through conversion of K-containing minerals. However, JF exerted adverse effects on the gasification reactivity of both biomass, with stronger effects at high JF ratios and low temperatures. The influence of JF on gasification reactivity was lower for cotton stalk due to its higher ash yield and K2O content.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Dandan Chen, Changsheng Bu, Xinye Wang, Jubing Zhang, Nobusuke Kobayashi, Guilin Piao, Yong Jiang, Haoyu Feng, Yuhao Dou
Summary: The gasification/combustion kinetics of a typical Chinese high-ash-fusion-temperature (AFT) coal char, Huainan (HN) coal char, were analyzed in this study. Results showed that at 1300 degrees C, the gasification and combustion processes transitioned from the chemical reaction control zone to the pore diffusion control zone, providing useful data for designing non-slagging EFGs systems using high-AFT coals.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Chemical
Weihong Jiao, Zhiqing Wang, Xing Zhou, Yangang Mei, Rongtao Feng, Tao Liu, Liang Ding, Jiejie Huang, Yitian Fang
CHEMICAL ENGINEERING SCIENCE
(2019)
Article
Energy & Fuels
Tao Liu, Zhongliang Yu, Yangang Mei, Rongtao Feng, Song Yang, Zhiqing Wang, Yitian Fang
Article
Energy & Fuels
Yangang Mei, Zhiqing Wang, Shengjian Zhang, Yitian Fang
Summary: Catalytic gasification with alkali addition is a novel gasification technology, where the catalytic effect is attributed to the activation of CO2 on the alkali surface. A new gasification mechanism is proposed, providing new insight for the process of catalytic gasification.
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.