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MIL-101固载磷钨酸催化氧气氧化脱硫性能

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化工学报 2016年第S1期67卷 283-288页

作者：丁建伟王睿于美青 korchak vladimir 山东大学环境科学与工程学院山东济南250199 俄罗斯科学院西蒙诺夫化学物理研究所莫斯科119991

采用一步包覆法成功地将磷钨酸(HPW)固载到多金属有机骨架MIL-101中,将其作为催化剂,氧气(O2)作为氧化剂,用于催化氧化模拟油品的脱硫实验。系统地研究了氧气流速、反应温度、硫含量对脱硫效率的影响,筛选出最佳反应条件,同时考察了空... 详细信息

采用一步包覆法成功地将磷钨酸(HPW)固载到多金属有机骨架MIL-101中,将其作为催化剂,氧气(O2)作为氧化剂,用于催化氧化模拟油品的脱硫实验。系统地研究了氧气流速、反应温度、硫含量对脱硫效率的影响,筛选出最佳反应条件,同时考察了空气作为氧化剂用于油品脱硫的可行性。结果表明,当初始硫含量为350μg·g^(-1),氧气流速为90ml·min^(-1),反应温度为75℃,催化剂用量占模拟油品质量的1%,反应时间60min,二苯并噻吩(DBT)的转化率可达74%。此外,通过重复利用实验证明催化剂有良好的再生活性。

关键词：氧化脱硫催化磷钨酸金属有机骨架氧气再生

H_3PW_(12)O_(40)/CNTs吸附-分解NO_x及微波作用效果

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高等学校化学学报 2012年第8期33卷 1826-1834页

作者：张学杨程琳杨烽王睿 korchak vladimir 山东大学环境科学与工程学院济南250100 山东大学化学化工学院济南250100 北京大学化学与分子工程学院北京100871 俄罗斯科学院西蒙诺夫化学物理研究所多相催化实验室莫斯科119991

将碳纳米管(CNTs)载体分别经混酸与硝酸蒸气预处理并在不同温度下煅烧,然后分别采用浸渍法及机械研磨法负载磷钨酸(HPW),制备出HPW/CNTs催化剂,对比考察了上述催化剂对NOx的吸附与分解效果.在空速为10000 h-1、吸附温度为200℃的条件下,... 详细信息

将碳纳米管(CNTs)载体分别经混酸与硝酸蒸气预处理并在不同温度下煅烧,然后分别采用浸渍法及机械研磨法负载磷钨酸(HPW),制备出HPW/CNTs催化剂,对比考察了上述催化剂对NOx的吸附与分解效果.在空速为10000 h-1、吸附温度为200℃的条件下,用0.5 g催化剂对1696 mg/m3的NOx进行吸附实验,结果表明,以硝酸蒸气预处理且经300℃煅烧后的CNTs为载体,采用机械研磨负载法制备的催化剂HPW/CNTs对NOx的吸附率与吸附能力最高,分别为54%与16.6 mg NOx/(g.h).对吸附NOx后的催化剂体系进行了催化分解NOx的程序升温脱附-质谱(TPD-MS)研究,结果表明,所吸附的NOx在快速升温过程中发生分解,在此过程中有氧产生,分解产物包括N2,O2及N2O.采用电阻炉快速加热与微波辐射2种方式分别对吸附的NOx进行催化分解,结果表明,微波功率为700 W时,NOx分解为N2的收率为33.3%,高于电阻炉以150℃/min快速升温的N2收率.使用过的催化剂通水蒸气后可实现再生,对再生后的催化剂进行循环使用研究,结果表明,再生后的催化剂吸附与催化分解NOx的性能未有明显下降.

关键词：氮氧化物磷钨酸碳纳米管微波辐射吸附-分解

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以功能化离子液体为溶剂的多酸脱硫性能

化工学报 2016年第S1期67卷 302-306页

作者：马云倩王睿于美青 korchak vladimir 山东大学环境科学与工程学院山东济南250199 俄罗斯科学院西蒙诺夫化学物理研究所莫斯科119991

合成了5种功能化离子液体([CPL][TBAB],[CPL]BF_4,[Bmim]HCO_3,[Bmim]OAc和[Bmim]Im)以及含有相同阳离子的多酸离子液体[CPL]_3PMo_(12)O_(4)和[Bmim]_3PMo_(12)O_(40),构建了以功能化离子液体为溶剂的多酸液相氧化脱硫体系,优选出最佳脱硫剂,并考察了不同吸收温度、气体流量下最优脱硫剂的脱硫性能。结果表明[Bmim]_3PMo_(12)O_(40)-[Bmim]HCO_3脱硫效率最高,优化的吸收条件为温度高于40℃、气体流量为100ml·min^(-1);[Bmim]_3PMo_(12)O_(40)-[Bmim]HCO_3可以简单地用空气再生。

关键词：离子液体多酸液相氧化 H2S 溶剂合成吸收性能

Equilibrium Arrivals to Preemptive Queueing System with Fixed and Random Population Size

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Journal of the Operations Research Society of China 2024年第1期12卷 77-92页

作者： Julia Chirkova vladimir Mazalov Institute of Applied Mathematical Research Karelian Research Centre of RASPetrozavodsk185910Russia School of Mathematics and Statistics Qingdao UniversityQingdao266071ShandongChina

A single-server queueing system with preemptive access is *** customer has one attempt to enter the system at its working interval[0,T].As soon as the customer request enters the system,the server immediately starts the *** when the next request arrives in the system,the previous one leaves the system even he has not finished his service *** study a non-cooperative game in which the customers wish to maximize their probability of obtaining service within a certain period of *** characterize the Nash equilibrium and the price of anarchy,which is defined as the ratio between the optimal and equilibrium social *** models are *** the first model the number of players is fixed,while in the second it is random and obeys the Poisson *** demonstrate that there exists a unique symmetric equilibrium for both ***,we calculate the price of anarchy for both models and show that the price of anarchy is not monotone with respect to the number of customers.

关键词： Service system Preemptive priorities Strategic users Random number of players Optimal arrivals Kolmogorov backward equations Nash equilibrium Price of anarchy

Study of asphaltene reaggregation in toluene/heptane mixture by dynamic and static light scattering

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Petroleum Research 2024年第1期9卷 48-54页

作者： vladimir N.Kuryakov Oil and Gas Research Institute of RAS(OGRI RAS) Gubkina Str.3119333MoscowRussian Federation

This paper presents the study of the effect of multiple ultrasonic impacts on submicron asphaltene aggregates in a toluene/heptane solution,conducted with dynamic light scattering *** objects of the study were four samples of asphaltenes obtained from four different *** all samples,the change in the average size of the asphaltene submicron aggregates with time was measured after the addition of a precipitant(heptane)to a solution of asphaltenes in toluene at an amount above the threshold *** aggregates formed in solution after the addition of the precipitant and were subjected to ultrasonic treatment,which led to the destruction of the asphaltene *** of destroyed asphaltenes was *** kinetics of this aggregation were similar to the kinetics of aggregation of asphaltenes after the addition of a *** iterations of asphaltene aggregate destruction in the sample led to a significant change in the kinetics of aggregation:the growth of aggregates slowed and stabilized at a size of approximately 200 nm and 30 nm for the different studied samples.

关键词： Asphaltenes Aggregation Sonication Dynamic light scattering Re-aggregation Colloidal stability Resins

On Differential Equations of Integrable Billiard Tables

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Acta Mathematica Sinica,English Series 2024年第1期40卷 417-424页

作者： vladimir DRAGOVIC Andrey E.MIRONOV Department of Mathematical Sciences The University of Texas at DallasRichardson TXUSA Mathematical Institute SANU BelgradeSerbia Novosibirsk State University NovosibirskRussia Sobolev Institute of Mathematics of the Siberian Branch of the Russian Academy of Sciences NovosibirskRussia

We introduce a method to find differential equations for functions which define tables,such that associated billiard systems admit a local first *** illustrate this method in three situations:the case of(locally)integrable wire billiards,for finding surfaces in R^(3)with a first integral of degree one in velocities,and for finding a piece-wise smooth surface in R^(3)homeomorphic to a torus,being a table of a billiard admitting two additional first integrals.

关键词： Polynomial first integrals wire billiards piece-wise smooth surfaces

Attempts to restore loss of function in damaged ACD cells open the way to non-mutational oncogenesis

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Genes & Diseases 2024年第3期11卷 5-6页

作者： vladimir F.Niculescu 86420 Diedorf Germany Kirschenweg

This correspondence to Gene&Diseases calls attention to the controversy between proponents of genetic modification in carcinogenesis and supporters of non-mutational *** from molecular cancer research and findings from evolutionary cancer cell biology support the latter claim and provide no rationale for the mutational origin of sporadic *** is more conceivable that the general susceptibility of asymmetric cell division(ACD)phenotypes to oxygen leads to irreparable DNA defects and dysregulated defective symmetric cell division(DscD)phenotypes.

关键词： rational latter finding

A Privacy-preserving Energy Management System Based on Homomorphic Cryptosystem for IoT-enabled Active Distribution Network

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 167-178页

作者： Qian Hu Siqi Bu Wencong Su vladimir Terzija the Department of Physics Hong Kong Baptist UniversityHong KongChina the Department of Electrical and Electronic Engineering Shenzhen Research InstituteThe Hong Kong Polytechnic UniversityHong KongChina the Department of Electrical and Computer Engineering University of Michigan-DearbornDearbornMI 48128USA the School of Engineering Newcastle UniversityNewcastleUK

Active distribution network(ADN),as a typically cyber-physical system,develops with the evolution of Internet of Things(IoTs),which makes the network vulnerable to cybersecurity *** this paper,the eavesdropping attacks that lead to privacy breaches are addressed for the IoT-enabled ADN.A privacy-preserving energy management system(EMS)is proposed and empowered by secure data exchange protocols based on the homomorphic *** the information transmission among distributed generators and load customers in the EMS,private information including power usage and electricity bidding price can be effectively protected against eavesdropping *** correctness of the final solutions,e.g.,optimal market clearing price and unified power utilization ratio,can be deterministically *** simulation results demonstrate the effectiveness and the computational efficiency of the proposed homomorphically encrypted EMS.

关键词： Eavesdropping attack energy management system homomorphic cryptosystem Internet of Things(IOTs) active distribution network(ADN) privacy-preserving

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Cavity continuum

Photonics Research 2024年第3期12卷 391-398页

作者： FAN CHENG vladimir SHUVAYEV MARK DOUVIDZON LEV DEYCH TAL CARMON School of Electrical Engineering Tel Aviv UniversityTel Aviv 6997801Israel Physics Department Queens College of CUNYFlushingQueensNew York 11367USA Solid State Institute Technion-Israel Institute of TechnologyHaifa 3200003Israel The Graduate Center of CUNY New YorkNew York 10016USA

We experimentally demonstrate and numerically analyze large arrays of whispering gallery *** fluorescent mapping,we measure the spatial distribution of the cavity ensemble’s resonances,revealing that light reaches distant resonators in various ways,including while passing through dark gaps,resonator groups,or resonator *** spatially decays exponentially in the *** practically infinite periodic array of resonators,with a quality factor(Q)exceeding 107,might impact a new type of photonic ensembles for nonlinear optics and lasers using our cavity continuum that is distributed,while having high-Q resonators as unit cells.

关键词： resonator cavity ensemble