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Theoretical Insight into the Effect of STEAM Temperature on Heavy Oil/STEAM Interface Behaviors Using Molecular Dynamics Simulation

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Journal of Thermal Science 2023年第6期32卷 2179-2195页

作者： YANG Renfeng CHEN Dongsheng ZHENG Wei MIAO Tingting LIU Fan WANG Taichao CHEN Hengyuan CHENG Tong State Key Laboratory of Offshore Oil Exploitation Beijing100028China Beijing Key Laboratory of Process Fluid Filtration and Separation College of Mechanical and Transportation EngineeringChina University of Petroleum-BeijingBeijing102249China CNOOC Research Institute Ltd. Beijing100028China

The interfacial behavior between heavy oil and STEAM is one of the vital pointers affecting the development efficiency of STEAM injection for heavy oil recovery.However,the underlying mechanisms of the interaction between heavy oil and STEAM at high temperature and pressure remain elusive.Herein,we have investigated the molecular-scale interactions on the interface between heavy oil droplet and STEAM phase at high temperatures(473 K,498 K,523 K,and 548 K)via molecular dynamics simulations.The results show that the interfacial thickness between heavy oil droplet and STEAM phase increases gradually with temperature,while the interfacial tension decreases constantly.Moreover,high temperature can damage hydrogen bonds,resulting in lower interaction energy between heavy oil droplet and STEAM phase.The radial distribution function results demonstrate that the interaction between heavy oil fractions and STEAM phase can be weakened by high temperature.Furthermore,the evolutions of interface are directly observed by the two-dimension density cloud maps at different temperatures,and the mean square displacement and self-diffusion coefficient demonstrate the evolution mechanism of heavy oil fractions and STEAM.In particular,the heavy oil/STEAM systems with asphaltenes at the interface are more likely to achieve high diffusivity and emulsifying capacity.This work provides a molecular-level insight for understanding the interfacial interaction mechanisms of heavy oil/STEAM systems during a STEAM injection process.

关键词： interfacial behavior heavy oil STEAM molecular dynamics simulation

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Oxidation Behaviors of Different Grades of Ferritic Heat Resistant Steels in High-Temperature STEAM and Flue Gas Environments

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Acta Metallurgica Sinica(English Letters) 2022年第7期35卷 1103-1116页

作者： Xiaogang Li Qu Liu Shanlin Li Yu Zhang Zhipeng Cai Kejian Li Jiluan Pan Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China Key Laboratory for Advanced Materials Processing Technology Ministry of EducationBeijing 100084China State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China Collaborative Innovation Center of Advanced Nuclear Energy Technology Tsinghua UniversityBeijing 100084China

For STEAM tubes used in thermal power plant,the inner and outer walls were operated in high-temperature STEAM and flue gas environments respectively.In this study,structure,microstructure and chemical composition of oxide films on inner and outer walls of exservice low Cr ferritic steel G102 tube and exservice high Cr ferritic steel T91 tube were analyzed.The oxide film was composed of outer oxide layer,inner oxide layer and internal oxidation zone.The outer oxide layer on the original surface of tube had a porous structure containing Fe oxides formed by diffusion and oxidation of Fe.More specially,the outer oxide layer formed in flue gas environment would mix with coal combustion products during the growth process.The inner oxide layer below the original surface of tube was made of Fe–Cr spinel.The internal oxidation zone was believed to be the precursor stage of inner oxide layer.The formation of internal oxidation zone was due to O diffusing along grain boundaries to form oxide.There were Fe–Cr–Si oxides discontinuously distributed along grain boundaries in the internal oxidation zone of G102,while there were Fe–Cr oxides continuously distributed along grain boundaries in that of T91.

关键词： Ferritic heat resistant steels High temperature service Oxide layer STEAM Flue gas Oxidation evolution

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Utilization of microwave STEAM pyrolysis to produce biochar for thermal energy storage

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Waste Disposal and Sustainable Energy 2022年第4期4卷 335-341页

作者： Wahap bin Abu Bakar Peter Nai Yuh Yek Kah Yein Cheong Augustine Chioma Affam Chee Chung Wong Rock Keey Liew Yie Hua Tan Su Shiung Lam Centre for Research of Innovation and Sustainable Development University of Technology SarawakNo.1Jalan University96000SibuMalaysia Centre on Technological Readiness and Innovation in Business Technopreneurship(CONTRIBUTE) University of Technology Sarawak96000SibuSarawakMalaysia NV Western PLT No.208BSecond FloorMacalister Road10400GeorgetownPenangMalaysia Department of Chemical and Energy Engineering Faculty of Engineering and ScienceCurtin University MalaysiaCDT 25098009MiriSarawakMalaysia Higher Institution Centre of Excellence(HICoE) Institute of Tropical Aquaculture and Fisheries(AKUATROP)Universiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia

Microwave STEAM pyrolysis(MSP)is an innovative thermochemical approach to converting biomass into high-quality biochar using STEAM to improve the dielectric heating of microwave radiation.Biochar shows high fixed carbon and carbon contents at a maximum temperature of 550℃in 10 min.The MSP achieved a heating rate of 112℃/min from 200℃to 400℃to produce biochar effectively.Furthermore,the thermal properties of biochar in microwave heating were investigated in this study to explore its potential as a microwave heat-absorbent material.Microwave is able to perform volumetric and controllable heating to the biochar.Moreover,biochar shows good microwave heat absorbency,storing and transferring heat effectively.The temperature profile of three different sizes of biochar was investigated to examine the efficiency of biochar in heat absorption from microwave radiation.It was found that the powder form of biochar showed a higher heat transfer rate of 40℃/min and a low cooling rate of 7.5℃/min.The presented results are useful for evaluating the application of biochar as a promising medium for heat storage systems.

关键词： Microwave STEAM Pyrolysis Biochar Thermal Storage

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基于“跨学科素养”的教学设计——以STEAM与“综合学习”为例

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全球教育展望 2022年第1期51卷 3-22页

作者：钟启泉华东师范大学课程与教学研究所上海200062

学校教育不仅需要培育学习者的"学科素养",也需要培育学习者的"跨学科素养"。这是将两门或两门以上的学科(领域)整合起来,旨在把新的知识同既有的知识、信息与体验链接起来,进而同社区生活乃至全球社会的现实课题链接起来,借以促进学习... 详细信息

学校教育不仅需要培育学习者的"学科素养",也需要培育学习者的"跨学科素养"。这是将两门或两门以上的学科(领域)整合起来,旨在把新的知识同既有的知识、信息与体验链接起来,进而同社区生活乃至全球社会的现实课题链接起来,借以促进学习者对学习主题的基础性与实践性理解,亦即超越了单一学科范畴的深度理解的精致化教学的设计。本文选择当今国际教育界公认的跨学科教学设计的典型——美国的STEAM和日本的"综合学习",旨在探讨其由来与发展、特质与价值、经验与启示。

关键词：跨学科素养教学设计 STEAM 综合学习

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CO2 assisted STEAM flooding in late STEAM flooding in heavy oil reservoirs

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Petroleum Exploration and Development 2019年第6期46卷 1242-1250页

作者： XI Changfeng QI Zongyao ZHANG Yunjun LIU Tong SHEN Dehuang MU Hetaer DONG Hong LI Xiuluan JIANG Youwei WANG Hongzhuang State Key Laboratory of Enhanced Oil Recovery PetroChina Research Institute of Exploration&DevelopmentBeijing 100083China Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China Research Institute of Petroleum Exploration&Development PetroChina Xinjiang Oilfield CompanyKaramary 834000China

To improve the oil recovery and economic efficiency in heavy oil reservoirs in late STEAM flooding,taking J6 Block of Xinjiang Oilfield as the research object,3D physical modeling experiments of STEAM flooding,CO2-foam assisted STEAM flooding,and CO2 assisted STEAM flooding under different perforation conditions are conducted,and CO2-assisted STEAM flooding is proposed for reservoirs in the late stage of STEAM flooding.The experimental results show that after adjusting the perforation in late STEAM flooding,the CO2 assisted STEAM flooding formed a lateral expansion of the STEAM chamber in the middle and lower parts of the injection well and a development mode for the production of overriding gravity oil drainage in the top chamber of the production well;high temperature water,oil,and CO2 formed stable low-viscosity quasi-single-phase emulsified fluid;and CO2 acted as a thermal insulation in the STEAM chamber at the top,reduced the STEAM partial pressure inside the STEAM chamber,and effectively improved the heat efficiency of injected STEAM.Based on the three-dimensional physical experiments and the developed situation of the J6 block in Xinjiang Oilfield,the CO2 assisted STEAM flooding for the J6 block was designed.The application showed that the CO2 assisted STEAM flooding made the oil vapor ratio increase from 0.12 to 0.16 by 34.0%,the oil recovery increase from 16.1%to 21.5%,and the final oil recovery goes up to 66.5%compared to STEAM flooding after perforation adjustment.

关键词： heavy oil reservoir three-dimensional physical simulation experiment STEAM flooding CO2 assisted STEAM flooding STEAM chamber STEAM(CO2)chamber overriding gravity drainage

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Bio-inspired Recyclable Carbon Interface for Solar STEAM Generation

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Journal of Bionic Engineering 2020年第2期17卷 315-325页

作者： Lei Shi Xinzhi Wang Yanwei Hu Yurong He Yuying Yan School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Fluids&Thermal Engineering Research Group Faculty of EngineeringUniversity of NottinghamNG72RDUK Research Centre for Fluids and Thermal Engineering University of Nottingham Ningbo ChinaNingbo 315100China

Solar power,as one of renewable energy,holds potential application for producing STEAM which relies on high-temperature liquid by traditional methods.Herein,STEAM was generated by a bio-inspired strategy derived from the plants transpiration using a Printed Recyclable Carbon Membrane(PRCM).The membrane structure facilitated the concentration of carbon particles for the photoreaction and the heat generation for water evaporation,thereby improving the photo-thermal conversion efficiency.The PRCM achieved the best steady evaporation efficiency of 51.9%,which was 5.6 times higher than the value for water and recycling tests were demonstrated.The carbon particles were separated from the water under the magnetism action,a convenient approach that avoided secondary pollution resulting from the disintegration of the PRCM.Rapid preparation,low cost,and reusability of the printed carbon membrane allow for photo-thermal applications such as solar STEAM generation and seawater desalination.

关键词： solar STEAM generation photo-thermal conversion bionic heat transfer process magnetic control

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STEAM Oxidation Resistance Comparison of Several Silicon Carbide Refractories at Elevated Temperatures

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China's Refractories 2023年第2期32卷 18-23页

作者： WANG Jiaping WU Jiguang HUANG Zhigang LYU Chunjiang WANG Wenwu Sinosteel Luoyang Institute of Refractories Research Co. Ltd.Luoyang 471039China

The oxidation tests of different SiC refractories including Si3N4-SiC bricks,Si3N4-Si2N2O-SiC bricks from China(SNO-1),Si3N4-Si2N2O-SiC bricks from overseas(SNO-2),SiAlON-SiC bricks,oxides bonded SiC bricks,self-bonded SiC bricks as well as SiC castables were carried out in the STEAM atmosphere(1 000 ℃,32 kg·m-3·h-1)for different durations(100,200,300,400 and 500 h).The mass,the volume,the bulk density and the apparent porosity before and after the oxidation were tested.The XRD and SEM analyses were conducted.The results indicate that:(1)under the STEAM atmosphere condition(1 000 ℃,32 kg·m-3·h-1),as the oxidation time increases from 0 to 500 h,the volume and the mass of the silicon carbide refractories increase,while the bulk density decreases;in terms of the apparent porosity,oxides bonded SiC bricks and SiC castables present an increasing trend,Si3N4-SiC bricks,SiAlON-SiC bricks and self-bonded SiC bricks present an increasing trend first and then a decreasing trend,and Si3N4-Si2N2O-SiC bricks present a decreasing trend or a trend of decreasing first and then increasing;(2)as for Si3N4-Si2N2O-SiC bricks,SNO-1 and SNO-2 have basically the same chemical and phase composition,SNO-2 has the lower mass change rate than SNO-1 during oxidation from 200-500 h,which indicates that SNO-2 has the better STEAM oxidation resistance than SNO-1.

关键词： silicon carbide refractories STEAM oxidation resistance

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基于STEAM理念酿酒工程专业英语教学改革与实践

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生物工程学报 2020年第9期36卷 1947-1954页

作者：刘晓辉董法宝唐维媛于志海刘晓柱黄名正贵州理工学院食品药品制造工程学院贵州贵阳550003

酿酒工程专业英语是酿酒工程专业的必修课程。为了提高酿酒工程专业英语教学质量与效果,结合培养高素质应用型人才培养方案,在教学中引入科学、技术、工程、艺术和数学多学科融合的超学科教育理念(称STEAM教育),挑选、设计、整合和优化... 详细信息

酿酒工程专业英语是酿酒工程专业的必修课程。为了提高酿酒工程专业英语教学质量与效果,结合培养高素质应用型人才培养方案,在教学中引入科学、技术、工程、艺术和数学多学科融合的超学科教育理念(称STEAM教育),挑选、设计、整合和优化教学内容。借助雨课堂、学堂在线、Open Language、Wine Folly、葡萄酒及烈酒教育基金会培训课程等平台资源,对教学方法和手段、考核方式、教学效果评价体系进行了创新性改革与实践。通过思维导图绘制、微视频制作、主题演讲、情景对话、程序创意设计、酒标及酒瓶包装设计大赛等教学方式的应用,切实有效地提高了学生学习的兴趣与投入,增强了学生对专业英语知识的掌握和综合应用能力。

关键词： STEAM 酿酒工程专业英语教学模式改革

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基于深度学习的早期STEAM项目开发的实践探索

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上海教育科研 2024年第3期 82-88页

作者：陆叶珍江苏省苏州工业园区华林幼儿园 215021

促进学习者有意义的深度学习是未来教育的价值追求与基本路向,是智能时代知识教学变革的迫切要求与有力回应。基于深度学习的早期STEAM项目开发,明晰STEAM教育的价值取向和现实意义,着眼于幼儿后继学习和全面发展,以建构基于深度学习的... 详细信息

促进学习者有意义的深度学习是未来教育的价值追求与基本路向,是智能时代知识教学变革的迫切要求与有力回应。基于深度学习的早期STEAM项目开发,明晰STEAM教育的价值取向和现实意义,着眼于幼儿后继学习和全面发展,以建构基于深度学习的早期STEAM教育实践的行动范式,突破当下STEAM项目实施瓶颈,为早期STEAM教育实践提供一定的行动范式和有力借鉴。

关键词：深度学习 STEAM STEAM项目活动

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Ethanol STEAM reforming study over ZSM-5 supported cobalt versus nickel catalyst for renewable hydrogen generation

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Chinese Journal of Chemical Engineering 2019年第3期27卷 677-684页

作者： Ashutosh Kumar Ram Prasad Yogesh Chandra Sharma Department of Chemistry Indian Institute of Technology (Banaras Hindu University) Varanasi Department of Chemical Engineering & Technology Indian Institute of Technology (Banaras Hindu University) Varanasi

The renewable hydrogen generation through ethanol STEAM reforming is one of the anticipated areas for sustainable hydrogen generation. To elucidate the role of Ni and Co with ZSM-5 support, catalysts were prepared by wet impregnation method and ethanol STEAM reforming(ESR) was performed. The catalysts were characterized by HR-XRD, ATR–FTIR, HR-SEM, TEM with SAED, EDAX, surface area analyzer and TPR. It had shown complete ethanol conversion at 773 K, but the selectivity in hydrogen generation was found higher for 10% Ni/ZSM-5 catalyst as compared to 10% Co/ZSM-5. The 10% Ni/ZSM-5 catalyst has about 72% hydrogen selectivity at temperature 873 K. It indicates that Ni is a more sustainable catalyst as compared to Co with ZSM-5 support for ESR. The C_2H_4 was found major undesirable products up to 823 K temperature. Nevertheless, the 10% Ni/ZSM-5 catalyst had shown its stability for high temperature(873 K) ESR performance.

关键词： Ethanol STEAM reforming Zeolite Hydrogen Renewable energy Catalyst

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