Article
Engineering, Chemical
Yujing Chen, Jipeng Meng, Di Bai, Chuang Li, Xiao Chen, Changhai Liang
Summary: The performance of Pt/xFe/ZSM-23 catalysts can be controlled by adjusting the extra-framework Fe content, with the catalyst exhibiting excellent hydroisomerization performance when the Fe content is 1.98wt%. The conversion of n-C(16) and selectivity to i-C-16 can both reach over 80wt% at a reaction temperature of 310 degrees Celsius.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Energy & Fuels
Maxim O. Kazakov, Marina Yu. Smirnova, Maxim E. Dubinin, Tatyana S. Bogomolova, Pavel P. Dik, Ivan S. Golubev, Mikhail E. Revyakin, Oleg V. Klimov, Aleksandr S. Noskov
Summary: The study investigates the combined effect of three-dimensional large-pore USY zeolite and one-dimensional medium-pore ZSM-23 zeolite in enhancing the cold flow properties of hydrocracking products. By selecting the catalyst compositions based on monozeolite catalysts testing, which operate in a similar temperature range and contribute to hexadecane conversion, it is shown that the appropriate combination of USY and ZSM-23 zeolites can complement each other and improve the conversion of both n-alkanes and iso-alkanes during vacuum gas oil hydrocracking. As a result, the cold flow properties of the obtained hydrocracking products are significantly improved while maintaining the activity and selectivity for the target products. The improvement in cold flow properties is accompanied by only a slight worsening of other important product characteristics.
Article
Chemistry, Organic
L. V. Pirutko, M. V. Parfenov, A. I. Lysikov, E. Yu. Gerasimov
Summary: Two procedures were suggested for preparing micro-mesoporous zeolite of MTT topology with improved textural characteristics, one involving hydrothermal crystallization and the other involving postsynthetic treatment with a NaOH solution. The samples obtained had crystal sizes of 100-200 nm and showed promising micropore and mesopore volumes.
PETROLEUM CHEMISTRY
(2021)
Article
Thermodynamics
Bruno J. B. Silva, Lenivaldo V. Sousa, Lais R. A. Sarmento, Ana C. S. Melo, Deidiane S. Silva, Paulo H. L. Quintela, Soraya L. Alencar, Antonio O. S. Silva
Summary: The study found that the micro/mesoporous structures in zeolite catalysts help inhibit the loss of crystallinity and maintain acidity, resulting in better stability and activity during catalyst regeneration. Hierarchical ZSM-23 zeolites showed lower deposited coke amounts and activation energy values for the thermal oxidation process, providing superior performance and lower energy levels for regeneration compared to microporous zeolites.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Multidisciplinary
Dezhu Zhang, Kang Huang, Yongsheng Xia, Hongyan Cao, Liheng Dai, Kai Qu, Lan Xiao, Yiqun Fan, Zhi Xu
Summary: In this study, a two-dimensional (2D) MFI-type zeolite membrane with excellent vanadium resistance and proton conductivity was successfully fabricated for high-performance vanadium flow batteries. The battery equipped with the 2D MFI-type zeolite membrane showed longer self-discharge period and stable cycling performance, demonstrating the potential application of 2D MFI-type membranes in stationary electrochemical energy-storage devices.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Energy & Fuels
Jiazheng Sun, Shuxiang Xiong, Hailong Lin, Qiong Wu, Linfei Xiao, Zhenni Liu, Xiujie Li, Wei Wang, Wei Wu
Summary: In this work, hierarchical ZSM-23 zeolites were synthesized using cationic surfactants and cationic polyelectrolytes as growth modifiers, and Pd/ZSM-23 catalysts were prepared. The addition of appropriate growth modifiers significantly improved the yield of iso-alkane products and limited the cracking process, with Pd/Z23-5PP catalyst showing the highest yield.
Article
Biochemistry & Molecular Biology
Izabela Kurzydym, Alberto Garbujo, Pierdomenico Biasi, Izabela Czekaj
Summary: Transition-metal-modified zeolites have attracted great interest among scientists recently. Ab initio calculations based on density functional theory were conducted using the Perdew-Burke-Ernzerhof (PBE) functional for exchange and correlation. Cluster models of ZSM-5 zeolites with adsorbed Fe particles on aluminum were used. The adsorption of three iron adsorbates (Fe, FeO, and FeOH) within the pores of the zeolite was investigated with different aluminum arrangements. The analysis of DOS diagram and molecular orbitals revealed the insulating or conducting nature of the systems, which significantly affects their catalytic activity.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Chemical
Siyan Yan, Jiale Zhu, Jianguo Zhuang, Xinhui Liu, Yitao Zhao, Yuan Qian, Xuedong Zhu, Fan Yang
Summary: ZSM-23 zeolite with a reduced a-axis was synthesized using TPPS and applied in n-hexane cracking, leading to higher ethene yield. The attachment of TPPS hindered the elongation growth of ZSM-23 crystals and promoted their diffusivity. The obtained short a-axis ZSM-23 showed excellent catalytic performances in n-hexane cracking, with better activity and stability compared to traditional ZSM-23.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Applied
Xuemin Li, Tao Pan, Jungkyu Choi, Heon Park, Zhijie Wu, Alex C. K. Yip
Summary: In this study, TON- and MFI-type zeolites with 10-membered rings were synthesized using ionic liquid-templating method. Their catalytic performances in propene dimerization were investigated. Despite different Si/Al ratios, the TON- and MFI-type zeolites showed comparable propene dimerization turnover rates due to their similar acid site strength. The different channel structures and acid properties of zeolite were responsible for the variation in catalytic selectivity between TON- and MFI-type zeolites.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Douglas Romero, Roderigh Rohling, Lingqian Meng, Marcello Rigutto, Emiel J. M. Hensen
Summary: The hydroconversion of n-hexadecane and n-heptane catalyzed by Pd/zeolite is influenced by the Bronsted acidity and crystalline domain size. Smaller alkanes are more significantly impacted by variations in the zeolite domain size.
JOURNAL OF CATALYSIS
(2021)
Article
Engineering, Environmental
Shuhui Wu, Yaquan Wang, Chao Sun, Taotao Zhao, Jingjing Zhao, Ziyang Wang, Wenrong Liu, Jiaxin Lu, Mingxue Shi, Aijuan Zhao, Lingzhen Bu, Zhiqiang Wang, Mengyao Yang, Yaqiong Zhi
Summary: This study prepared a series of Y/ZSM-5 zeolite composites through a VPT method, showing excellent adsorption performance for volatile organic compounds and good performance under humid conditions after dealumination treatment. The composites had larger adsorption capacities for aromatics, alkanes, and esters.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Peerapol Pornsetmetakul, Sorasak Klinyod, Chadatip Rodaum, Saros Salakhum, Ploychanok Iadrat, Emiel J. M. Hensen, Chularat Wattanakit
Summary: By fine-tuning the texture of HZSM-5 catalysts and reducing the crystal size to ultra-thin nanosheet, high and stable ethylene yield can be achieved from ethanol dehydration.
Article
Energy & Fuels
Olga A. Kosareva, Denis N. Gerasimov, Igor A. Maslov, Irina Pigoleva, Svetlana Zaglyadova, Vadim V. Fadeev
Summary: Research shows that catalyst activity, dewaxed product yield, and quality indicators are highly sensitive to zeolite channel size. Catalysts based on EU-2 and ZSM-12 with wider channels exhibit the highest activity. Wider zeolite channels promote the reduction in aromatic hydrocarbon content of dewaxed products.
Article
Chemistry, Physical
Yanfeng Shen, Zhengxing Qin, Shunsuke Asahina, Natsuko Asano, Guanqun Zhang, Shuya Qian, Yanhang Ma, Zifeng Yan, Xinmei Liu, Svetlana Mintova
Summary: This study reveals the defect-zoning and Al-zoning in pseudo-single ZSM-5 crystals through unbiased NH4F etching, describing the formation process of these zones and establishing the correlation between Al zoning and the spatial distribution of C and Na. The distinct inner heterogeneity in the ZSM-5 crystals sheds light on the crystal growth process, providing insights for developing novel framework structures with targeted properties.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Nanoscience & Nanotechnology
Zhongwen Dong, Chuanyu Yang, Dongpu Zhao, Yanan Wang, Weifeng Chu, Zhaochi Feng, Xiangxue Zhu, Wenjie Xin, Yongchen Shang, Shenglin Liu, Longya Xu
Summary: A new interzeolite transformation method has been developed for the quick synthesis of nanoaggregate catalyst CDM-5, where the formation process of ordered aluminosilicate aggregate species was revealed through UV-Raman spectra and HRTEM, SEM images.
ACS APPLIED NANO MATERIALS
(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.