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Chinese Journal of Chemical Engineering 2024年第3期67卷 126-134页

作者： Hongnan Chen Yifei sun Bojian Cao Minglong Wang Ming Wang Jinrong Zhong changyu sun Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China School of Chemistry and Chemical Engineering Changsha University of Science&TechnologyChangsha 410114China

Carbon emission reduction and clean energy development are urgent demands for mankind in the coming *** an efficient CO_(2) storage method can significantly reduce CO_(2) emissions in the short *** this study,we attempted to construct sediment samples with different residual CH_(4) hydrate amounts and reservoir conditions,and then investigate the potentials of both CO_(2) storage and enhanced CH_(4) recovery in depleted gas hydrate deposits in the permafrost and ocean zones,*** results demonstrate that CO_(2) hydrate formation rate can be significantly improved due to the presence of residual hydrate seeds;However,excessive residual hydrates in turn lead to the decrease in CO_(2) storage *** by the T-P conditions of the reservoir,the storage amount of liquid CO_(2) can reach 8 times that of gaseous CO_(2),and CO_(2) stored in hydrate form reaches 2-4 ***,we noticed two other advantages of this *** is that CO_(2) injection can enhance CH_(4) recovery rate and increases CH_(4) recovery by 10%-20%.The second is that hydrate saturation in the reservoir can be restored to 20%-40%,which means that the solid volume of the reservoir avoids serious ***,this is crucial for protecting the goaf *** summary,this approach is greatly promising for high-efficient CO_(2) storage and safe exploitation of gas hydrate.

关键词： Hydrate Depressurization CO_(2) storage CH_(4) production Reservoir remediation

Rate-limiting factors in hydrate decomposition through depressurization across various scales:A mini-review

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Chinese Journal of Chemical Engineering 2024年第3期67卷 206-219页

作者： Xian sun Peng Xiao Qinfeng Shi Lingban Wang Zhenbin Xu Yuhao Bu Xiaohui Wang Yifei sun changyu sun Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China Jining University Jining 273115China

Natural gas hydrate is an energy resource for methane that has a carbon quantity twice more than all traditional fossil fuels ***,their practical application in the field has been limited due to the challenges of long-term preparation,high costs and associated *** studies,on the other hand,offer a safe and cost-effective means of exploring the mechanisms of hydrate dissociation and optimizing exploitation *** hydrate decomposition is a complicated process along with intrinsic kinetics,mass transfer and heat transfer,which are the influencing factors for hydrate decomposition *** identification of the rate-limiting factor for hydrate dissociation during depressurization varies with the scale of the reservoir,making it challenging to extrapolate findings from laboratory experiments to the actual *** review aims to summarize current knowledge of investigations on hydrate decomposition on the subject of the research scale(core scale,middle scale,large scale and field tests)and to analyze determining factors for decomposition rate,considering the various research scales and their associated influencing factors.

关键词： Gas hydrate Rate-limiting factors Research scale Depressurization Decomposition

TBAB hydrate formation and growth in a microdevice under static and dynamic conditions

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Petroleum Science 2024年第2期21卷 1396-1404页

作者： Xingxun Li Ming Liu Qingping Li Weixin Pang Guangjin Chen changyu sun State Key Laboratory of Heavy Oil Processing China University of Petroleum BeijingBeijing102249China State Key Laboratory of Natural Gas Hydrate CNOOC Research Institute Co.Ltd.Beijing100027China

The natural gas hydrate has become one of the most promising future green energy sources on the *** natural gas hydrates mostly exist in the sediments with porous structure, so a solid understanding of the hydrate formation and growth processes in the porous medium is of significance for the exploitation of natural gas hydrate. The micro-packed bed device is one of the efficient microfluidic devices in the engineering field, but it has been rarely used for the hydrate-based research. In this study, a transparent micro-packed bed device filled with glass beads was developed to mimic the porous condition of sediments, and used to in-situ visualize the hydrate formation and growth habits in the pore spaces under both static and dynamic conditions. For the static experiment, two types of hydrate growth patterns in porous medium were observed and identified in the micro-packed bed device, which were the graincoating growth and pore-filling growth. For the dynamic condition, the hydrate formation, growth,distribution habits and hydrate blockage phenomena in the pore spaces were in-situ visually *** impacts of flowrate and subcooling on the pressure variation of the micro-packed bed and the duration of the hydrate growth under dynamic flow condition in pores were in-situ monitored and analyzed. The higher flowrate could result in the faster hydrate growth and more severe blockage in pores, but the effect of subcooling condition might be less significant at the high flowrate.

关键词： Hydrate formation Hydrate growth Microdevice In-situ measurement

Highly efficient CO_(2) capture using 2-methylimidazole aqueous solution on laboratory and pilot-scale

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Chinese Journal of Chemical Engineering 2024年第3期67卷 148-156页

作者： Kun Li Han Tang Shuangshuang Li Zixuan Huang Bei Liu Chun Deng changyu sun Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Zhejiang Tiandi Environmental Protection Technology Co. Ltd.Hangzhou 310012China

To date,the primary industrial carbon capture approach is still absorption using aqueous solutions of ***,to pursue a substitute for the amine-based approach to improve the CO_(2) capture efficiency and decrease the energy cost further,we report a new carbon capture approach using a 2-methylimidazole(mIm)aqueous *** properties and sorption behaviors of this approach have been experimentally *** results show that the mIm solution has higher CO_(2) absorption capacity under relatively higher equilibrium pressure(>130 kPa)and lower desorption heat than the methyldiethanolamine solution.91.6%sorption capacity of mIm solution can be recovered at 353.15 K and 80 *** selectivity for CO_(2)/N_(2) and CO_(2)/CH_(4) can reach an exceptional 7609 and 4324,***,the pilot-scale tests were also performed,and the results demonstrate that more than 98%of CO_(2) in the feed gas could be removed and cyclic absorption capacity can reach 1 mol·L^(-1).This work indicates that mIm is an excellent alternative to alkanolamines for carbon capture in the industry.

关键词： CO_(2) capture Absorption 2-Methylimidazole Separation Pilot-scale tests

Low-concentration and multi-component NMHCs capture from oil field exhaust using porous ZIF-8/iso-hexadecane slurry

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Green Chemical Engineering 2024年第2期5卷 245-256页

作者： Kun Li Han Tang Jin Cai Chun Deng Bei Liu Yunlei Peng changyu sun Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China

Non-methane hydrocarbons(NMHCs)are a common type of volatile organic compounds(VOCs)pollutant in the petrochemical industry and have attracted widespread attention because of their adverse health effects and environmental *** this paper,we report a new porous slurry formed with zeolitic imidazolate framework-8(ZIF-8)and iso-hexadecane to capture the low-concentration and multi-component NMHCs(mainly ethane(C_(2)H_(6)),propane(C_(3)H_(8)),and n-butane(n-C_(4)H_(10)))from the oil field *** sorption capacity of C_(2)H_(6)in the slurry is significantly higher than that of nitrogen(N_(2))and methane(CH_(4)).Moreover,the slurry demonstrated a clear advantage for C_(2)H_(6)over N_(2)and CH_(4)in competitive adsorption through the pressure-drop *** the NMHCs capture experiments,the C_(3)H_(8)and n-C_(4)H_(10)concentrations after purification can be reduced to below 100 ppm,while the C_(2)H_(6)concentration can reach approximately 180 *** encouragingly,in the breakthrough tests,the slurry exhibits a perfect kinetic separation selectivity for multi-component ***,to avoid structural collapse of ZIF-8 material during long-term use in acidic and wet environments,a certain amount of 2-methylimidazole was retained in the slurry as a protective agent in the material synthesis *** this way,the ZIF-8 materials in the slurry can retain the stable characteristic structure in an aqueous and acidic environment and keep the capture capacity for NMHCs without *** believe the porous ZIF-8/iso-hexadecane slurry is a promising capture agent for low-concentration and multi-component NMHCs with strong purification capacity and stability.

关键词： VOCs capture NMHCs capture MOFs ZIF-8 Porous slurry

含下伏气的第一类天然气水合物藏开发实验与模拟研究进展

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化工进展 2024年第4期43卷 2091-2103页

作者：孙贤柳军王晓辉孙长宇陈光进中国石油大学(北京)化学工程与环境学院北京102249 济宁经济技术开发区管理委员会山东济宁272000

第一类天然气水合物藏由上部含水合物沉积层和下伏气-液两相流层组成,是目前天然气水合物开采的首选目标。本文对第一类天然气水合物藏特征及试采情况进行了介绍,并回顾了相关实验和数值模拟研究进展。实验研究方面总结了第一类水合物... 详细信息

第一类天然气水合物藏由上部含水合物沉积层和下伏气-液两相流层组成,是目前天然气水合物开采的首选目标。本文对第一类天然气水合物藏特征及试采情况进行了介绍,并回顾了相关实验和数值模拟研究进展。实验研究方面总结了第一类水合物储层的重塑方案和该类水合物藏的产气特性。指出第一类水合物藏在储层塑造方面存在一定的局限性,多数实验研究中合成的水合物储层其下伏气是没有多孔介质的纯气体,不能模拟实际带有下伏气层的水合物储层的传质过程。而且,不同产气阶段的产气速率差异明显,初始阶段产气速率明显更快。此外,适用于经典的第三类水合物藏分解特性的建模思路,即将甲烷水合物的分解描述为移动边界问题,假设水合物分解发生在尖锐界面上,不适用于第一类水合物藏分解的数值模拟研究,因为该类水合物储层在分解阶段同时出现多个分解前沿。文中同时提出了有关第一类水合物藏开发未来的研究方向,即扩大研究尺度和模拟自然海洋环境水合物储层受力情况,以更贴近自然水合物成藏环境,提高研究结论的可参考性。

关键词：第一类水合物藏重塑传热传质数值模拟

维普期刊数据库博看期刊

Experimental investigation on the effective thermal conductivities of different hydrate-bearing sediments

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Petroleum Science 2023年第4期20卷 2479-2487页

作者： Xingxun Li Rucheng Wei Qingping Li Weixin Pang Qi Fan Guangjin Chen changyu sun State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing102249China State Key Laboratory of Natural Gas Hydrate CNOOC Research Institute Co.Ltd.Beijing100027China

The natural gas hydrate has been regarded as an important future green *** progress on the hydrate exploitation has been made,but some challenges are still *** order to enhance the hydrate exploitation efficiency,a significant understanding of the effective thermal conductivity(ETC)of the hydrate-bearing sediment has become essential,since it directly controls the heat and mass transfer behaviors,and thereby determines the stability of hydrate reservoir and production *** this study,the effective thermal conductivities of various hydrate-bearing sediments were in-situ measured and *** impacts of temperature,particle size and type of sediment were *** effective thermal conductivities of the quartz sand sediments before and after hydrate formation were in-situ *** results show the weak negative correlation of effective thermal conductivity of the quartz sand sediment on the temperature before and after the hydrate *** effective thermal conductivity of the hydrate-bearing sediment decreases with the increase of particle size of the *** dominant effect of the type of porous medium on the characteristics of the effective thermal conductivity of hydrate-bearing sediment was *** results indicate that both the effective thermal conductivities of hydrate-bearing quartz sand sediment and hydrate-bearing silicon carbide sediment are weakly negatively correlated with temperature,but the effective thermal conductivity of hydrate-bearing clay sediment is weakly positively dependent on the *** addition,the values of the effective thermal conductivities of various hydrate-bearing sediments are in the order of hydrate-bearing silicon carbide sediment>hydrate-bearing quartz sand sediment>hydrate-bearing clay *** findings could suggest that the intrinsic thermal conductivity of porous medium could control the characteristics of effective thermal conductivity of hydrate-bearin

关键词： Hydrate Thermal conductivity Sediment Heat transfer In-situ measurement

A purely green approach to low-cost mass production of zeolitic imidazolate frameworks

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Green Energy & Environment 2023年第3期8卷 775-784页

作者： Hai Li Wan Chen Bei Liu Mingke Yang Zixuan Huang changyu sun Chun Deng Dapeng Cao Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China State Key Lab of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029China Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China

Although zeolitic imidazolate frameworks(ZIFs)have bright prospects in wide fields like gas storage/separation,catalysis and medicine,etc.,their large-scale applications are bottlenecked by the absence of their low-cost commercial production ***,we report an uncon ventional method suitable for environmentally friendly and low-cost mass-production of *** this method,taking the synthesis of ZIF-8 as an example,ZnO was used instead of Zn(NO_(3))_(2) in traditional solvent synthesis methods and CO_(2) was introduced to dissolve ZnO in aqueous solution of 2-methylimidazole(HMeim)and form water soluble salt([ZnMeim]^(+)[MeimCOO]^(-))at room ***,by removing CO_(2) through heating or vacuuming,Meim-ions are produced and instantaneously assemble with[ZnMeim]^(+)s to generate ZIF-8 without any by *** to the absence of strong acid anions(such as NO^(-)_(3) and Cl^(-) et al.)in solution,the washing of filter cake required in the conventional approaches could be omitted and the filtrate containing only water and HMeim could be reused *** method is really green as no waste gas or liquid generates because CO_(2) and water could be recycled *** overcomes almost all bottlenecks occurred in commercial production of ZIF-8 when using traditional methods.A pilot plant was established for mass-production of ZIF-8 and hundreds kilograms of ZIF-8 was produced,which indicates that the new method is not only environmentally friendly but also low cost and commercial *** is expected that the new method would open an avenue for commercial applications of ZIFs.

关键词： Zeolitic imidazolate frameworks Mass production Metal oxide Carbon dioxide Environmentally friendly

“双碳”背景下钢铁冶金专业人才培养策略研究

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化工管理 2024年第24期 30-33页

作者：李廷乐王国承李静孙长余肖远悠辽宁科技大学材料与冶金学院辽宁鞍山114051

近年来,中国相继发布多个关于低碳减排的政策文件,展现出国家对低碳减排的重视。钢铁冶金行业作为典型的重工业行业,迫切需要进行绿色低碳转型,而这一目标的实现不仅要求在技术上革新,更需要培养出适应该转型的专业人才。因此,文章探讨... 详细信息

近年来,中国相继发布多个关于低碳减排的政策文件,展现出国家对低碳减排的重视。钢铁冶金行业作为典型的重工业行业,迫切需要进行绿色低碳转型,而这一目标的实现不仅要求在技术上革新,更需要培养出适应该转型的专业人才。因此,文章探讨了钢铁行业人才培养的新挑战和新需求,分析了高校钢铁冶金专业在“双碳”背景下的人才培养策略:一是全面优化人才培养模式,二是深化产学研合作,三是系统优化课程体系,四是建立完善教学评价体系,以确保教育内容与行业需求高度一致。通过此综合性的措施,培养能够推动行业绿色低碳技术发展的高素质人才。

关键词： “双碳”目标钢铁行业绿色低碳转型人才培养策略教育系统改革

基于LiDAR数据在水利DLG生产中的应用

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测绘与空间地理信息 2024年第S1期47卷 276-278页

作者：孙昌瑜焦元元刘忠强杨清臣邸健吉林省水利水电勘测设计研究院吉林长春130012 吉林省地理信息院吉林长春130000

以工程实例为依托,介绍了LiDAR数据制作DLG的主要流程,论证了由DOM及点云滤波生成的DEM制作DLG成果完全满足1∶1 000比例尺精度要求。而且影像数据使用激光雷达的高精度惯导及GPS数据生产的POS,可完全实现免相控。激光点云滤波的DEM与... 详细信息

以工程实例为依托,介绍了LiDAR数据制作DLG的主要流程,论证了由DOM及点云滤波生成的DEM制作DLG成果完全满足1∶1 000比例尺精度要求。而且影像数据使用激光雷达的高精度惯导及GPS数据生产的POS,可完全实现免相控。激光点云滤波的DEM与航摄影像DEM对比发现,对植被茂密区域及较窄的水利渠道,点云滤波DEM数据可准确的获取高程信息,而航摄影像DEM数据则无法获得。

关键词：激光点云数字正射影像模型数字高程模型 DLG生产