Article
Energy & Fuels
Hao Song, Haiping Yang, Chuang Zhao, Junhao Hu, Jun Zou, Peng Wu, Siqin Li, Hanping Chen
Summary: This study investigates the co-gasification and catalytic co-gasification of petroleum coke and coal at high temperatures. It compares the structural characteristics of high temperature petroleum coke and bituminous coal pyrolysis char, explores the effects of blending ratio on gasification reactivity and synergy, and studies the impact of catalyst on co-gasification. The results show that the gasification reactivity of the blends increases with the coal blending ratio, and a synergistic effect is observed as the co-gasification proceeds with temperature.
Article
Thermodynamics
Peng Lv, Jiaofei Wang, Yonghui Bai, Xudong Song, Weiguang Su, Guangsuo Yu, Yuan Ma
Summary: This study investigates the influence of iron-based waste catalyst (IWC) on the gasification reaction of petroleum coke (PC) with CO2. The results show that IWC acts as an efficient catalyst by reducing the activation energy of the gasification reaction, thus increasing the reaction rate.
THERMOCHIMICA ACTA
(2022)
Article
Energy & Fuels
Wei Li, Deepak Pudasainee, Rajender Gupta, Wu Yang, Ben Wang, Lushi Sun
Summary: The research found that controlling the gasification temperature of petroleum coke above 1200 degrees Celsius is beneficial for improving gasification reactivity. Petroleum coke with high ash content promotes the decomposition of functional groups to generate active radicals, thereby increasing active sites.
Article
Energy & Fuels
Xianyu Liu, Jiandong Ma, Qi Hong, Shiwei Ma, Huijun Ge, Tao Song
Summary: The study found that potassium can be used as a catalyst to accelerate coke conversion in the chemical looping gasification process, with good catalytic effects. Different potassium introduction modes have different effects on syngas yields and distribution, carbon conversion and potassium evolution. Using potassium to modify coke can achieve higher average carbon conversion rates.
Review
Energy & Fuels
Miao Wang, Yiling Wan, Qinghua Guo, Yonghui Bai, Guangsuo Yu, Yurong Liu, Hong Zhang, Shu Zhang, Juntao Wei
Summary: Petroleum coke and biomass/coal co-gasification is a promising approach for efficiently integrating the individual advantages of different gasification feedstocks with syngas production. Research on syngas production, reactivity characteristics, and synergy behavior of co-gasification is critical. H-2-rich syngas and higher co-gasification reactivity can be acquired under specific conditions, such as high H/C ratio, coal/biomass proportion, gasification temperature, and gasification agent concentration. Synergy behavior in co-gasification shows relationships with free radical migration and AAEMs transfer.
Article
Thermodynamics
Agnieszka Korus, Adam Klimanek, Slawomir Sladek, Andrzej Szlek, Airy Tilland, Stephane Bertholin, Nils Erland L. Haugen
Summary: The process of petcoke conversion in chemical looping combustion technology requires detailed knowledge about the reactions with O-2, CO2, and H2O. Experimental results showed that the reaction with CO2 was slow, and kinetic parameters of petcoke gasification were determined by applying different models to the data obtained from a custom test rig.
Article
Thermodynamics
Tianhong Zhou, Lichao Ge, Qian Li, Long Yang, Longhui Mai, Jing Huang, Yang Wang, Chang Xu
Summary: Isothermal pyrolysis experiments were conducted to optimize the utilization of petroleum coke. Combustion characteristics and gasification properties of petroleum coke and its semi-coke were investigated. Results showed that gas production increased with higher pyrolysis temperatures. The graphitization degree of semi-coke showed a decreasing and then increasing trend, reaching its lowest at 650 degrees C. Combustion performance improved with increased oxygen concentration, while gasification rate was higher for semi-coke than petroleum coke.
Review
Energy & Fuels
Ben Wang, Wei Li, Chuan Ma, Wu Yang, Deepak Pudasainee, Rajender Gupta, Lushi Sun
Summary: This paper summarizes the synergistic effects of co-gasification of petroleum coke (PC) with various carbon-based feedstocks on gasification reactivity, syngas production, and mineral transformation. The key parameters and approaches affecting the synergy are discussed, and the two main synergy mechanisms are explored. Suggestions for improving syngas quality and dealing with emerging feedstocks are provided.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Thermodynamics
Xin Yu, Dunxi Yu, Fangqi Liu, Jingkun Han, Jianqun Wu, Minghou Xu
Summary: The study found that high-sulfur petroleum coke has little impact on co-gasification, while rice straw shows a significant catalytic effect only after being completely gasified into ash. Under high-concentration steam conditions, the main components of synthesis gas are H-2 and CO2, and rice straw ash exhibits a violent melting state.
Article
Chemistry, Multidisciplinary
Lirui Mao, Tao Liu, Yanlin Zhao, Mingdong Zheng
Summary: This study used thermal analysis technology to investigate the gasification reaction of high-sulfur petroleum coke and lignite in a CO2 atmosphere. The results showed that lignite improved gasification performance and reduced the starting and end temperatures compared to pure coke. The gasification synergy factors were all greater than 1, indicating obvious synergism in the co-gasification process. Lignite ash gradually accumulated on the surface of high-sulfur petroleum coke, with Ca and Fe elements exhibiting catalytic effects.
GREEN PROCESSING AND SYNTHESIS
(2023)
Article
Thermodynamics
Xin Yu, Dunxi Yu, Fangqi Liu, Jianqun Wu, Minghou Xu
Summary: This study focused on the pyrolysis behavior of petroleum coke at high temperatures. It found a secondary pyrolysis stage at temperatures above 1300 K and observed the release of gases such as HCN, CO2 and SO2 during this process. The study also highlighted the importance of char thermoplastic state in determining its reactivity towards CO2.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Energy & Fuels
Xiuxia Zhang, Lining Liu, Bofan Lang, Lianxin Xia, Riyi Lin, Xinwei Wang
Summary: The detailed composition and molecular models of waste tires (WT) and petroleum coke gasification residue (PCGR) were determined. The co-combustion characteristics of WT and PCGR were investigated, and the evolution of specific products with oxygen concentration and temperature was analyzed. The results showed that blending combustion was promoted with higher WT fraction, and PCGR decomposed and burnt faster in fuel-lean conditions. The production of NOx was significantly higher in the O2/N2 atmosphere than that in the O2 atmosphere.
Article
Metallurgy & Metallurgical Engineering
Asaithambi Suresh, Abhinav Kumar Soni, Vimal Kumar Chandaliya, Avinash Kumar Tiwary, Pritesh Garg, Boina Sagar, Pawan Kumar Choudhary, Biswajit Seal, Dushyant Kumar, Pratik Swarup Dash, Ranjan Kumar Singh, Mantu Patra
Summary: Enhancing the gasification reaction and improving the gas utilization efficiency of blast furnace can be achieved by using catalytic materials to enhance the gasification reaction kinetics of nut coke. The addition of solid waste materials generated internally can lower the starting temperature of nut coke gasification and improve the coke reactivity index. The plant trial showed a reduction in carbon rate and a slight improvement in gas utilization efficiency when catalyst doped nut coke was used.
METALLURGICAL RESEARCH & TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Man Zhang, Hongyu Ban, Zhiqing Wang, Xinning Xiang, Xiaolei Wang, Qian Zhang
Summary: The impact of K(2)CO(3) catalyst on the gasification of petroleum coke was studied. The results showed that increasing the amount of K(2)CO(3) greatly reduced the gasification temperatures of the coke. However, beyond a certain concentration of K+, the catalytic reaction became saturated. Further increase in the catalyst did not inhibit the gasification rate. The vaporization of the catalyst was observed during high-temperature gasification. XRD, Raman spectroscopy, and N-2 adsorption analyses revealed that the presence of the catalyst altered the carbon crystallite structure of the residual coke.
Article
Thermodynamics
Zhenwei Li, Hongpeng Xu, Wenming Yang, Shaohua Wu
Summary: This study investigated the syngas production and sulfur conversion mechanisms during the CLG process with petcoke as fuel. The results show that higher temperature and steam flow rate can improve the conversion of carbon and sulfur in petroleum coke, but increasing gas flow rates may lead to more intense fluidization and increased CO2 and SO2 production.
Article
Energy & Fuels
Youjian Zhu, Junhao Hu, Wei Yang, Wennan Zhang, Kuo Zeng, Haiping Yang, Shenglei Du, Hanping Chen
Article
Agricultural Engineering
Qingfeng Che, Minjiao Yang, Xianhua Wang, Qing Yang, Yingquan Chen, Xu Chen, Wei Chen, Junhao Hu, Kuo Zeng, Haiping Yang, Hanping Chen
BIORESOURCE TECHNOLOGY
(2019)
Article
Engineering, Chemical
Qi Chen, Junhao Hu, Haiping Yang, Daqian Wang, Huihui Liu, Xianhua Wang, Hanping Chen
CHEMICAL ENGINEERING SCIENCE
(2020)
Article
Energy & Fuels
Yingpu Xie, Haiping Yang, Kuo Zeng, Youjian Zhu, Junhao Hu, Qiaoting Mao, Qingchuan Liu, Hanping Chen
Article
Agricultural Engineering
Ziyue Tang, Wei Chen, Junhao Hu, Siqin Li, Yingquan Chen, Haiping Yang, Hanping Chen
BIORESOURCE TECHNOLOGY
(2020)
Article
Energy & Fuels
Youjian Zhu, Yiming Chen, Wei Cheng, Wennan Zhang, Junhao Hu, Kuo Zeng, Haiping Yang, Jingai Shao, Hanping Chen
Summary: This study investigated the effects of three calcium phosphate additives on PM1 emissions from cornstalk combustion, with one additive showing promising potential in reducing PM1 emissions. The addition of Ca-3(PO4)(2) was found to be a potentially effective method in reducing PM1 emissions during straw biomass combustion.
Article
Chemistry, Applied
Sunwen Xia, Ning Cai, Jing Wu, Haoyu Xiao, Junhao Hu, Xu Chen, Yingquan Chen, Haiping Yang, Xianhua Wang, Hanping Chen
FUEL PROCESSING TECHNOLOGY
(2020)
Article
Thermodynamics
Ning Cai, Xiaoqiang Li, Sunwen Xia, Lin Sun, Junhao Hu, Pietro Bartocci, Francesco Fantozzi, Paul T. Williams, Haiping Yang, Hanping Chen
Summary: In this study, the pyrolysis-catalysis of various waste plastics with an Fe/Al2O3 catalyst was investigated in order to understand the correlation between plastic structure and products, as well as possible reaction mechanisms. The results showed differences in gaseous and liquid products from different types of plastics, with HIPS and GPPS leading to higher solid carbon deposits.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Wei Cheng, Youjian Zhu, Jing'ai Shao, Wennan Zhang, Guihao Wu, Hao Jiang, Junhao Hu, Zhen Huang, Haiping Yang, Hanping Chen
Summary: A new phosphoric acid modification method was proposed to improve the reduction efficiency of PM0.2 by kaolin additive in agricultural biomass pellet combustion, significantly reducing PM0.2 emissions. The modification destroyed the internal structure of kaolin and increased its pore structure, leading to better alkali capture ability.
Article
Chemistry, Analytical
Ziyue Tang, Wei Chen, Yingquan Chen, Junhao Hu, Haiping Yang, Hanping Chen
Summary: The use of zeolite catalysts and activated carbon effectively reduces nitrogen content in bio-oil and produces high-quality bio-oil. The denitrification strength of zeolite catalysts and activated carbon on volatiles varies at different temperatures, affecting oil yield and quality.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Green & Sustainable Science & Technology
Haoyu Xiao, Jonathan Harding, Shuaishuai Lei, Wei Chen, Sunwen Xia, Ning Cai, Xu Chen, Junhao Hu, Yingquan Chen, Xianhua Wang, Xin Tu, Haiping Yang, Hanping Chen
Summary: Plasma-catalysis pyrolysis of polypropylene was investigated in this study. Compared to conventional catalytic pyrolysis, plasma-catalysis pyrolysis increased gas products and improved the selectivity of BTX while inhibiting the production of wax. Additionally, the stability of the plasma-catalytic system was maintained with almost no variation observed after 10 cycles.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agricultural Engineering
Guang Yang, Qiang Hu, Junhao Hu, Haiping Yang, Shuhang Yan, Yingquan Chen, Xianhua Wang, Hanping Chen
Summary: Novel biochar-based nanocatalysts loaded with Ni/Ca/Fe nanoparticles were prepared by one-step impregnation method for catalytic steam gasification of biomass, which showed improved tar elimination and syngas production. The evenly distributed metal particles with a particle size of less than 20 nm were found to significantly increase H2 yield and tar conversion. Fe-loaded biochar exhibited the best catalytic gasification performance, with 87% tar conversion and 42.46 mmol/g H2 production, indicating its promising potential for hydrogen-rich syngas production.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Xiaopeng Shi, Biao Wang, Junhao Hu, Wei Chen, Chun Chang, Shusheng Pang, Pan Li
Summary: This study proposes a method for preparing value-added bio-products dominated by aromatic hydrocarbon bio-oil with high selectivity using microwave and char-based multi-catalysts (CMCs). Through experiments and comparisons of different catalysts' structural characteristics and pyrolysis properties, it was found that Zn-modified CMCs showed good selectivity for monocyclic aromatic hydrocarbons, while Zr-modified CMCs inhibited the formation of polycyclic aromatic hydrocarbons.
Article
Energy & Fuels
Zixu Yang, Junhao Hu, Yang Li, Yingquan Chen, Kezhen Qian, Haiping Yang, Hanping Chen
JOURNAL OF THE ENERGY INSTITUTE
(2019)
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.