Article
Engineering, Chemical
Hui Li, Xiaoling Song, Gang Li, Lingxue Kong, Huaizhu Li, Jin Bai, Wen Li
Summary: This study investigated the effect of coal blending on ash fusibility and slurryability of Xinjiang low-rank coal. The results showed that coal blending not only reduced the ash fusibility but also improved the slurryability of low-rank coal. The concentration and stability of coal water slurry can be significantly increased by blending with specific coal types.
Article
Energy & Fuels
Lirui Mao, Mingdong Zheng, Baoliang Xia, Facun Jiao, Tao Liu, Yuanchun Zhang, Shengtao Gao, Hanxu Li
Summary: Residual carbon in coal ash plays a crucial role in the melting process, affecting melting characteristics, mineral composition, phase transformation, and melt structure. It influences the melting process through mineral transformation, melt structure, phase transformation, atmosphere reaction, dissolution, and collapse of the physical structure of slag. The type and amount of residual carbon have different effects on the melting process.
Article
Chemistry, Applied
Zong-shuai Yuan, Ji Wang, Lingxue Kong, Jin Bai, Zhonghai Ni, Huaizhu Li, Zongqing Bai, Wen Li
Summary: The study found that synthetic ash cannot completely replace real coal ash for fusibility research. Ashes with different chemical compositions have significant differences in sintering temperature, resulting in different fusibility between CA and SA.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Applied
Linmin Zhang, Juntao Wei, Jie Xu, Xudong Song, Weiguang Su, Peng Lv, Ying Zhou, Guangsuo Yu
Summary: The co-gasification of coal and coal indirect liquefaction residue (LR) can mitigate environmental pollution caused by solid waste accumulation. The addition of LR effectively reduces ash fusion temperatures (AFTs) and promotes the formation of low-temperature eutectic, leading to a continuous decrease of AFTs. The ash melting behavior follows different mechanisms with and without LR addition. This study provides valuable insights for utilizing LR in coal gasification processes for reducing environmental impact.
FUEL PROCESSING TECHNOLOGY
(2021)
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
Jun Zhao, Hassan Nasir Mangi, Zhenyue Zhang, Ru'an Chi, Haochen Zhang, Mengyu Xian, Hong Liu, Haibin Zuo, Guangwei Wang, Zhigao Xu, Ming Wu
Summary: This study aimed to utilize low-rank coal and biomass residue in the coking process, and investigated the performance and structural characteristics of the prepared cokes. The results showed that modified coal could improve the quality and caking performance of coke, as well as enhance the gasification performance.
Article
Energy & Fuels
Wenju Shi, Jin Bai, Lingxue Kong, Xiaoming Li, Jingpei Cao, Zongqing Bai, Wen Li
Summary: This study investigates the fusion behaviors of coal ash with high sulfur and basic oxide level, and reveals the impact of standard ashing procedure and additives on mineral transformation and fusion temperature. The findings can provide guidance for the utilization of coal with high levels of sulfur and alkali in the slagging gasifier.
Article
Agricultural Engineering
Jianbo Li, Xiaofei Long, Hongyan Zhu, Zhuo Liu, Xiaofeng Lu, Dongke Zhang
Summary: In this paper, the fusibility of biomass ashes with different chemical and mineral compositions was studied using HT-XRD technique. It was found that ash fusion temperatures (AFTs) increased in the order of walnut shell (WS) < wheat straw (WHS) < peanut shell (PES) < pine sawdust (PS). The chemical compositions of the ashes played a role in these differences. HT-XRD analysis revealed the presence and disappearance of K-bearing minerals in WS ash, the release of KCl and formation of K silicates or aluminosilicate in WHS ash, and the identification of SiO2, MgO, CaAl2Si2O8, and CaAl2SiO6 in PES ash. The macro- and micro-morphological analysis confirmed the sintering behavior of the different ashes at various temperatures.
BIOMASS & BIOENERGY
(2023)
Article
Energy & Fuels
Chong He, Fang Cao, Yuexing Wei, Zibing Zhao, Liping Cui, Yuhong Qin, Stanislav V. Vassilev, Christina G. Vassileva
Summary: The gasification behavior of coal and rice straw differs when gasified separately, but during co-gasification, the presence of rice straw particles promotes the shrinkage of coal particles due to their abundant alkaline components. The ash fusion mechanism of coal is characterized by a "softening-melting" process, while rice straw follows a typical "melting-dissolution" mechanism.
Article
Agricultural Engineering
Chong He, Yujia Du, Xingrui Cai, Jirui Wang, Yuhong Qin, Zibing Zhao, Huaizhu Li, Stanislav V. Vassilev, Christina G. Vassileva
Summary: The high contents of certain ash-forming elements in biomass ash can cause ash-related problems during co-gasification of coal and biomass, affecting gasifier operation. In this study, the sintering behavior of different ash mixtures was investigated and the sintering mechanism was revealed through phase studies. The results showed that the sintering temperature reached its minimum at a specific blending ratio of Jatropha seed cake ash in the coal-biomass ash mixture. The presence of specific crystalline phases and the transition of phosphorus from fluxing effect to refractory effect played important roles in the sintering process. These findings can be used for predicting the ash sintering temperature in coal-biomass gasifiers.
BIOMASS & BIOENERGY
(2023)
Article
Energy & Fuels
Yinfei Liao, Zhe Yang, Maoyan An, Longfei Ma, Aosheng Yang, Yijun Cao, Luojian Chen, Hourui Ren
Summary: This study investigated the interaction between oil collector drop and coal particle in low-rank coal flotation. Different collectors were used and their interaction mechanisms were revealed through measurements such as wetting heats and FTIR analysis. The results showed that mixed collector obtained higher flotation efficiency.
Article
Green & Sustainable Science & Technology
Jiahao Jiang, Yuan Tie, Lei Deng, Defu Che
Summary: Biomass has the potential to partially replace fossil fuels as a carbon-neutral fuel. Water washing pretreatment can improve the ash fusibility performance of biomass, and the effect of water washing on ash fusion temperatures can be explained through thermodynamic equilibrium calculations. Additionally, a convenient method to study the dynamic behavior of biomass ash during fusion process is proposed.
Article
Energy & Fuels
Jun Zhao, Hong Liu, Haochen Zhang, Xiaolin Song, Haibin Zuo, Guangwei Wang, Zhigao Xu, Ming Wu, Zhenyue Zhang, Ru'an Chi
Summary: This study focuses on the utilization of low-rank coal and biomass residue in the coking process. Hypercoal, produced through co-thermal extraction, was investigated as a component in the coking process. The study found that the inclusion of 15% hypercoal in the coal blend resulted in improved compressive and drum strengths of the coke. Furthermore, the high vitrinite content in hypercoal contributed to the formation of mosaics within the coke, enhancing its cold strength.
Article
Chemistry, Applied
Xiaoming Li, Jingxia He, Jing Guo, Xianxian Zhang, Chong He, Jin Bai, Wen Li
Summary: The fusion behavior of fly ash from a Shell coal gasifier was analyzed by particle sieving, and it was found that the fusibility of amorphous fly ash was influenced by anorthite crystallization at high temperature. The fusion process of fly ash particle was divided into three stages: sintering, plateau, and melting. The fusion behavior differed for fly ash particles <45 μm and >45 μm due to the content and viscosity of anorthite crystals.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Thermodynamics
Kuihua Han, Xian Li, Jianhui Qi, Yingquan Zhu, Shenwei Long, Haopeng Li, Shengli Niu, Shujuan Li, Yang Xu
Summary: This study examined the impact of blending different types of biomass and additives on emissions from biomass briquette combustion, finding that emissions of SO2 and NO can be reduced through specific blending and additives, with an optimal mixing ratio suggested. This method has the potential to save additives and reduce costs for biomass briquettes.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(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.