Article
Energy & Fuels
Bo Yao, Hao-Ran Zhu, Bao-Dong Yan, Chuan-Xian Li, Fei Yang, Guang-Yu Sun, Hong-Bo Zeng
Summary: This paper investigated the effects of pre-heating treatment temperatures on the flowability and wax deposition characteristics of a typical waxy crude oil after adding wax inhibitors. The results showed that the pre-heating treatment can improve the flowability of the crude oil and alleviate wax deposition, but it also increases the wax content in the deposits.
Article
Energy & Fuels
Fei Yang, Haoran Zhu, Chuanxian Li, Bo Yao, Feng Wang, Jinxiu Chen, Guangyu Sun
Summary: The study focuses on the impacts and mechanisms of asphaltenes and wax inhibitors on the wax deposition characteristics of model waxy oil. It is found that the presence of asphaltenes and wax inhibitors can lead to thinner and harder wax deposits, without significantly affecting the solubility of wax crystals. Additionally, the adsorption of EVA molecules on asphaltene surfaces can improve crude oil rheology at low temperatures and inhibit wax deposition.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Mechanical
Allan Belati, Fabricio Venancio, Ronald Wbeimar Pacheco Ortiz, Vinicius Ottonio O. Goncalves, Vinicius Kartnaller, Joao Cajaiba
Summary: This study presents a novel approach to evaluate wax deposition inhibitors by measuring the differential pressure in a test tube. The results showed that the use of inhibitors prolonged the time until the maximum differential pressure of 1000 mbar was reached and reduced the wax particle size and agglomeration tendency.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Lillian M. Mawby, Bellamarie Ludwig, Benjamin J. Lear
Summary: This study reports on the reaction between methyltriethoxysilane (MTES) and micrometer-sized aluminum particles facilitated by HCl, and finds that the presence of HCl leads to a restructuring of the aluminum particles, which is both sufficient and necessary for the deposition of silane.
Article
Engineering, Environmental
Fuweng Zhang, Kaiqiao Wu, Damiano La Zara, Michael J. Quayle, Feilong Sun, Gunilla Petersson, Staffan Folestad, Jia Wei Chew, J. Ruud van Ommen
Summary: By depositing different materials as nanoscale films onto micronized budesonide powders using atomic/molecular layer deposition (ALD/MLD) coatings, the flow properties of the powders can be altered and improved. Inorganic nanofilms deposited via ALD can reduce inter-particle forces, leading to improved drug delivery performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Pavel Ilushin, Kirill Vyatkin, Anton Kozlov
Summary: This paper presents a new empirical model for addressing wax deposits in oil production. The model considers oil flow conditions, laboratory data, and product water cut. Industrial operation experience showed a high convergence between calculated and actual deposit profiles, with a standard deviation of maximum wax thickness of 6.0% and a depth with the greatest wax thickness of 3.5%. The use of this technique optimizes well cleaning, heating cable installation, and hot flushing parameters, increasing efficiency and reducing costs.
Article
Engineering, Chemical
Jie Tang, Haifeng Lu, Xiaolei Guo, Haifeng Liu
Summary: This study used the FT4 powder rheometer to test the flow properties of materials and investigated the wall pressure distribution in a horizontal silo experimentally. A physical model based on Janssen theory was proposed to effectively describe the characteristics of wall pressure distribution. Experimental results and theoretical predictions showed that wall pressures increase with additional pressure and decay along the axial direction.
Review
Energy & Fuels
Bingfan Li, Ziyuan Guo, Liming Zheng, Erxiu Shi, Bo Qi
Summary: This paper reviews recent research on wax deposition and provides a comprehensive analysis of the mechanisms, influencing factors, predictive models, and inhibition methods. Future research directions, including the study of non-Newtonian features and phase transition, microscopic mechanisms of wax deposition, and intrinsic mechanisms and action laws of various influencing factors, are also proposed.
Article
Energy & Fuels
Kaifeng Fan, Si Li, Rongbin Li
Summary: Wax deposition in crude oil transportation is influenced by factors such as bulk temperature, deposition duration, and carbon number distribution of wax molecules. The development of a new correlation has improved the accuracy of wax molecular diffusivity calculation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Chemical
Yu Zhang, Qiyu Huang, Yamei Liu, Yiran Liu, Rongbin Li, Yijie Wang, Xun Zhang
Summary: In this study, the behavior and differences of wax deposition in polyethylene pipes and stainless steel pipes were compared. It was found that there were differences in weight and content of wax deposition between the two materials. Moreover, important parameters such as diffusivity and temperature gradient played significant roles and had a significant impact on radial mass flux. Higher diffusivity in polyethylene pipes enhanced the diffusion flux of wax in the radial direction, while a larger radial concentration gradient played a decisive role.
Article
Chemistry, Multidisciplinary
Yudou Wang, Xu Zhu, Minghui Gao, Bo Zhang, Lei Zhu
Summary: This paper introduces a degradable glutinous rice/chitosan-phytic acid composite coating that can solve the problem of wax deposition on pipeline surfaces. The coating exhibits excellent antifouling and antiwaxing performance.
Article
Energy & Fuels
Sedi Helsper, Matthew W. Liberatore
Summary: Increasing oil production from cold environments has led to flow assurance issues caused by wax deposition and hydrate formation. This study investigates the high-pressure flow properties of waxy oils and finds that wax concentration has a larger effect on wax appearance temperature than pressure. Understanding waxy oil rheology under methane-saturated, high-pressure conditions is crucial for addressing flow assurance challenges in cold environments.
Article
Engineering, Multidisciplinary
Benchun Yao, Zichen He, Na Lu, Shimin Zhang
Summary: This paper introduces a novel PIG and its pigging scheme, highlighting its innovative features and motion control mechanism. Furthermore, an intelligent wax-removal algorithm based on Convolutional Neural Network is proposed and its superiority is demonstrated, laying the foundation for future practical applications.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2022)
Article
Engineering, Chemical
Weigang Du, Yongsheng An, Liyong Guan, Chengchen Xiong, Runshi Huo, Bing Tang
Summary: This study presents a thermal dynamic wax removal method using hot nitrogen gas circulation and develops a temperature calculation model for a wellbore considering different injection parameters. It provides a design method for wax removal and plug removal.
Article
Engineering, Chemical
Rongbin Li, Qiyu Huang, Dongxu Zhang, Xiangrui Zhu, Jinxu Shan, Zhimin Li
Summary: Through comparing the diffusivity of wax, radial thermal gradient, and wax precipitation rate in PE and SS pipes, it was found that these factors have interrelated effects, with the thermal gradient playing a dominant role in the migration of wax from the oil bulk to the deposits. The diffusivity of wax in the PE pipe was higher, while the radial thermal gradient and wax precipitation rate were lower.
Article
Energy & Fuels
Chuanxian Li, Haoran Zhu, Fei Yang, Hongye Liu, Feng Wang, Guangyu Sun, Bo Yao
Article
Chemistry, Physical
Haoran Zhu, Chuanxian Li, Yuanbo Fan, Peng Guo, Fei Yang, Guangyu Sun, Bo Yao, Zheng Xia
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2020)
Article
Energy & Fuels
Haoran Zhu, Chuanxian Li, Zongming Xiu, Zhiqiang Zhao, Kai Mu, Hui Dai, Feng Wang, Fei Yang, Bo Yao
Article
Energy & Fuels
Fei Yang, Haoran Zhu, Chuanxian Li, Bo Yao, Feng Wang, Jinxiu Chen, Guangyu Sun
Summary: The study focuses on the impacts and mechanisms of asphaltenes and wax inhibitors on the wax deposition characteristics of model waxy oil. It is found that the presence of asphaltenes and wax inhibitors can lead to thinner and harder wax deposits, without significantly affecting the solubility of wax crystals. Additionally, the adsorption of EVA molecules on asphaltene surfaces can improve crude oil rheology at low temperatures and inhibit wax deposition.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(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.