Article
Energy & Fuels
Shijian Zhang, Jiaqiang Jing, Min Luo, Min Qin, Feng Zhang, Liang Yuan
Summary: Crude oil containing sand poses serious safety hazards to the surface gathering system, but wellhead sand removal can effectively eliminate the threat. A hydrocyclone desanding experimental device was developed to explore the factors affecting hydrocyclone separation, such as oil viscosity, water content, and gas injection. The study found the operating parameters for efficient desanding of high-viscosity oil and recommended removing dissolved gas before desanding on-site to enhance resistance to gas interference.
Article
Energy & Fuels
Yu-long Chang, Wang-qiang Ti, Hua-lin Wang, Shou-wei Zhou, Yuan Huang, Jian-ping Li, Guo-rong Wang, Qiang Fu, Hai-tao Lin, Ji-wei Wu
Summary: This study aims to improve the performance of a hydrocyclone suitable for subsea gas hydrate extraction by studying the effects of operating and geometric parameters through experiments and computational fluid dynamics (CFD) method. Results show that the optimal flow rate is 7 m(3)/h, and separation efficiency decreases while pressure drop increases as the solid content of the inlet increases.
Article
Environmental Sciences
Yuxiao Sun, Yi Liu, Bowen Xu, Jianqi Chen, Wei Yuan, Caifei Jiang, Dun Wang, Hualin Wang
Summary: Efficient oil-water separation, including emulsified oil separation and treatment of actual petroleum refinery wastewater, was achieved through the use of highly hydrophobic sand and a modified sand filter bed. The hydrophobic sand quickly adsorbed oil with high capacity, and oil removal efficiency was significantly improved in a hydrocyclone. This study proposes a novel oil-water separation method with high promise for industrial oily wastewater treatment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Xiaohua Huang, Yingying Lu, Guobo Wu, Zhiping Liu
Summary: The primary sewage sludge in Chongqing contains a high concentration of fine sand, which presents challenges in treatment processes. While a grit chamber is commonly used for separation, hydrocyclones show superior performance in terms of cost effectiveness and ease of operation. Through experiments, it was found that hydrocyclone FX100 was more suitable for actual operation due to its higher processing capacity and operating power compared to FX50.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Ning Li, Hui Ke, Tongyu Wang, Shuqian Xia
Summary: The study focused on designing and applying surface-functionalized Fe3O4 particles to reduce heavy oil viscosity from Shengli Oilfield. Fe3O4-OA showed the best viscosity reduction effect on Chenping heavy oil, attributed to the surface functionalization of asphaltene aggregates, improvement of lipophilicity, and dispersion stability after destruction.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Rui Guo, Wei Fu, Le Qu, Yongfei Li, Weihua Yuan, Gang Chen
Summary: In this study, Fe(III) oleate was used as a catalyst and methanol was introduced as a hydrogen donor in aquathermolysis. The results showed that methanol can increase the viscosity reduction rate of aquathermolysis. The addition of methanol promoted the breakage of long-chain alkanes in heavy oil, decreased the content of asphaltene and resin, and improved the fluidity of oil samples.
Article
Energy & Fuels
Xiaodong Gao, Pingchuan Dong, Jiawei Cui, Qichao Gao
Summary: This study aims to develop a more accurate viscosity model of diluted heavy crude based on machine learning techniques. By using a multilayer neural network to predict the viscosity of heavy oil diluted with lighter oil, it was found that the new model can predict the viscosity of diluted heavy oil with higher accuracy and outperforms other models.
Article
Green & Sustainable Science & Technology
Yuxiao Sun, Yi Liu, Jianqi Chen, Yuan Huang, Hao Lu, Wei Yuan, Qiang Yang, Jiandong Hu, Bichuan Yu, Dun Wang, Weinan Xu, Hualin Wang
Summary: The study achieved efficient removal of suspended solids and oil in petroleum refinery wastewater through a physical method, which also saved a significant amount of chemical consumption and related costs, demonstrating the advantages of the physical pretreatment process in terms of environmental and cost benefits.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Temurali Kholmurodov, Arash Tajik, Abdolreza Farhadian, Oybek Mirzayev, Pooya Tahay, Alexey V. Vakhin, Alimorad Rashidi
Summary: This study aims to fill the research gap of using aromatic ligands in catalyst synthesis for catalytic aquathermolysis of heavy oil. The developed oil-soluble catalyst (Ni-OSC) using catechol as a novel ligand effectively interacts with heavy oil fractions, reducing the content of resin and asphaltene and increasing the amounts of saturated and aromatic hydrocarbons. GC-MS analysis revealed an increase in low molecular weight hydrocarbons and a higher concentration of alkanes and aromatic hydrocarbons in the presence of Ni-OSC, improving the quality and recovery of heavy oil.
Article
Chemistry, Applied
Chenhui Wang, Lingyu Gao, Menghui Liu, Shuqian Xia, You Han
Summary: This study investigated the mechanisms of viscosity reduction of functionalized SiO2 nanoparticles in heavy oil using molecular dynamics simulation. It was found that increasing surface lipophilicity or grafting density enhances adsorption of asphaltene and reduces interfacial tension, leading to viscosity reduction in heavy oil.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Qian Chen, Yueliang Liu, Jian Hou, Xincheng Li, Bei Wei, Qingjun Du
Summary: This study investigates the phase transition characteristics of heavy oil-viscosity reducer-water emulsion system. It was found that an oil-in-water (O/W) emulsion occurs when the VR concentration is greater than 0.3 wt%, the oil-water ratio is lower than 1:1, and the salinity is less than 10,000 mg/L. On the other hand, a water-in-oil emulsion is formed when the VR concentration is less than 0.3 wt%, the oil-water ratio is higher than 1:1, and the salinity is higher than 10,000 mg/L. These findings provide valuable insights for adjusting the parameters of heavy oil recovery using VR.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Cunchuan Zheng, Haoran Fu, Yongliang Wang, Tailiang Zhang, Zhiyu Huang, Wenmeng Duan
Summary: The viscosity reducer prepared by using SA and S as polymerization monomers, and EDMA as branched monomers can effectively inhibit asphaltene precipitation by changing the polarity of asphaltene molecules, resulting in improved dispersion of asphaltene.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
D. Luo, Z. Ren
Summary: Conventional light oil reserves are depleting, leading to a worldwide demand for recovery of viscous oil to meet energy needs. The new nanofluid technology can effectively recover crude oil at room temperature, with multi-stage injection proving superior to single injection.
MATERIALS TODAY PHYSICS
(2021)
Article
Energy & Fuels
Jianwei Wang, Xiaodong Tang, Jingjing Li, Lan Dai, Guizhong Deng
Summary: The effects and upgrading mechanism of biomass in the aquathermolysis of heavy oil were studied. The results showed that biomass is more suitable as a source of hydrogen and oxygen compared to water, but the active hydroxyl group in biomass reduces the upgrading efficiency.
Article
Education, Scientific Disciplines
Mingjun Yang, Rui Jiang, Xinyuan Wu, Yingchun Yue
Summary: Cyclone separation is an effective method for treating offshore oil production platform's oily wastewater. However, there is limited research on the impact of dispersion on the separation efficiency of liquid-liquid separation hydrocyclones. This study used numerical simulation to investigate the influence of oil droplet characteristics on the efficiency of a hydrocyclone oil removal device. The analysis revealed the oil removal mechanism, where oil and water take different flow paths under the guidance of tangential velocity. The results showed that droplet size had a positive impact on separation efficiency, oil concentration had a negative impact, and oil droplet velocity was directly proportional to efficiency within a certain range. These findings contribute to the efficient application of hydrocyclone oil removal devices.
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)