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A techno-economic and life cycle assessment for the production of green methanol from CO_(2): catalyst and process bottlenecks

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Journal of Energy Chemistry 2022年第5期31卷 255-266页

作者： Tomas Cordero-Lanzac Adrian Ramirez Alberto Navajas Lieven Gevers sirio Brunialti Luis MGandía Andrés T.Aguayo s.mani sarathy Jorge Gascon Department of Chemical Engineering University of the Basque Country(UPV/EHU)PO Box 64448080 BilbaoSpain King Abdullah University of science and Technology KAUST Catalysis Center(KCC)Advanced Catalytic MaterialsThuwal 23955Saudi Arabia Department of science Public University of Navarre(UPNA)Arrosadía Campus s/n31006 PamplonaSpain Institute for Advanced Materials and Mathematics(InaMat2) Universidad Pública de Navarra(UPNA)Edificio Jerónimo de AyanzCampus de ArrosadiaPamplona-Iruña 31006Spain King Abdullah University of science and Technology Clean Combustion Research Center(CCRC)Thuwal 23955Saudi Arabia

The success of catalytic schemes for the large-scale valorization of CO_(2) does not only depend on the development of active,selective and stable catalytic materials but also on the overall process *** we present a multidisciplinary study(from catalyst to plant and techno-economic/lifecycle analysis)for the production of green methanol from renewable H2 and CO_(2).We combine an in-depth kinetic analysis of one of the most promising recently reported methanol-synthesis catalysts(InCo)with a thorough process simulation and techno-economic *** then perform a life cycle assessment of the simulated process to gauge the real environmental impact of green methanol production from CO_(2).Our results indicate that up to 1.75 ton of CO_(2) can be abated per ton of produced methanol only if renewable energy is used to run the process,while the sensitivity analysis suggest that either rock-bottom H2 prices(1.5$kg1)or severe CO_(2) taxation(300$per ton)are needed for a profitable methanol ***,we herein highlight and analyze some critical bottlenecks of the *** attention has been paid to the contribution of H2 to the overall plant costs,CH4 trace formation,and purity and costs of raw *** addition to providing important information for policy makers and industrialists,directions for catalyst(and therefore process)improvements are outlined.

关键词： CO_(2) Methanol Kinetic modeling Process simulation Life cycle assessment

丁烯/丁醇异构体低温氧化Waddington反应机制理论研究

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燃烧科学与技术 2022年第5期28卷 540-548页

作者：赵倩李阳 mani sarathy 黄佐华张英佳西安交通大学动力工程多相流国家重点实验室西安710049 西北工业大学燃烧、结构与内流场重点实验室西安710072 阿卜杜拉国王科技大学清洁燃烧研究中心图沃23955沙特阿拉伯

Waddington机理是烯烃和醇类异构体低温氧化机理建模的重要组成部分.针对丁烯/丁醇异构体,系统研究了低温氧化过程的Waddington动力学机制.基于量子化学原理,对该反应机制下的反应速率常数和物种热力学性质进行计算.基于过渡态理论,结合... 详细信息

Waddington机理是烯烃和醇类异构体低温氧化机理建模的重要组成部分.针对丁烯/丁醇异构体,系统研究了低温氧化过程的Waddington动力学机制.基于量子化学原理,对该反应机制下的反应速率常数和物种热力学性质进行计算.基于过渡态理论,结合RRKM/ME方法,获得目标体系温度-/压力依赖的速率系数.在统计热力学的基础上,计算了所有关键物种温度相关的内能、生成焓、熵和热容等热力学量.与文献结果比较发现,异丁烯(R4和R5体系)的动力学与热力学参数均与文献值吻合较好.该理论计算结果可直接用于丁烯和丁醇异构体低温氧化动力学模型构建.

关键词： Waddington机制丁烯/丁醇异构体从头算法速率系数热力学参数

Impact of fifth order dispersion on soliton solution for higher order NLs equation with variable coefficients

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Journal of Ocean Engineering and science 2020年第3期5卷 205-213页

作者： Angelin Vithya M.s.mani Rajan Department of Physics Anna UniversityUniversity College of EngineeringRamanathapuram 623513India

In this paper,the variable coefficient nonlinear schrödinger equation with fifth order dispersion in the inhomogeneous optical fiber is investigated to study the impact of fifth order dispersion on attosecond soliton *** on the Darboux transformation method,soliton solution is constructed with modulated coefficients though Lax *** show that the coefficients of GVD and fifth order term are the main keys to control the amplitude,width and phase shift in the *** the suitable choices of coefficients for the obtained soliton solution,some new types of soliton management through fifth order are presented for the first ***,the influence of fifth order dispersion of the higher order NLs equations with and without modulated coefficients is discussed in *** will also highlight the impact of the studies on application in ocean *** results may be potentially useful in the soliton shaping and management in inhomogeneous fibers.

关键词： Fifth order dispersion Attosecond pulse soliton control soliton management Inhomogeneous fiber Oceanic waves

WDP1轻型客运机车的开发及利用计算机模拟进行设计评估

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国外内燃机车 1997年第12期 1-6页

作者： s.mani 杨兵

印度铁路使用的WDM2型干线内燃机车，是一种客货两用机车。它是迄今为止印度在客运和货运中大量使用的主型机车，在最近的30年中一直工作得很出色。然而，在当今迅变的情况下，它的作用正逐渐减小。因为今天的要求是提高能量效率，并且... 详细信息

印度铁路使用的WDM2型干线内燃机车，是一种客货两用机车。它是迄今为止印度在客运和货运中大量使用的主型机车，在最近的30年中一直工作得很出色。然而，在当今迅变的情况下，它的作用正逐渐减小。因为今天的要求是提高能量效率，并且优化机车设计，而WDM2型机车是作为在重载高粘着的货运设计和轻载高速客运设计之间的一种折衷方案而设计的，因此它并非是一种好的选择。设在勒克瑙的印度铁路的研究、设计和标准组织已设计了一种B0-B0机车，与WDM2型机车的客运能力相当，但油耗降低了15％～20％。文中阐述了该设计工作的思路，并说明了运用计算机模拟技术评估此机车设计方案。

关键词：轻型客运机车计算机模拟评估WDP1型设计

streptomyces ghanaensis VITHM1 mediated green synthesis of silver nanoparticles： Mechanism and biological applications

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Frontiers of Chemical science and Engineering 2016年第4期10卷 542-551页

作者： mani Abirami Krishnan Kannabiran Biomolecules and Genetic Division School of Biosciences and Technology VIT University Tamil Nadu 623014 India

We present the microbial green synthesis of silver nanoparticles （hiPs） by streptomyces ghanaensis VITHM1 strain （MTCC No. 12465）. The secondary metabolites in the cell free supernatant of this bacterium when incubated with 1 mmol/L AgNO3, mediated the biological synthesis of AgNPs. The synthesized AgNPs were characterized by UV-visible spectrum, X-ray diffrac- tion （XRD）, atomic force microscope, scanning electron microscopy equipped with energy dispersive spectroscopy, transmission electron microscopy, FT-IR spectroscopy, dynamic light scattering and zeta potential. They were highly stable and, spherical in shape with the average size of 30-50 nm. The secondary metabolites involved in the formation of AgNPs were identified gas chromatographymass spectrography. The 3D structure of the unit cell of the synthesized AgNPs was determined using XRD data base. The synthesized AgNPs exhibited significant antibacterial activity against tested bacterial pathogens, and did not show haemolysis on human red blood cells. This green synthesis could provide a new platform to explore and use AgNPs as antibacterial therapeutic agents.

关键词： streptomyces ghanaensis VITHM1 nanopar-ticles 3D structure antibacterial activity

Controlling Tendons to Modulate stiffness of a Planar-to-spatial Tendon-Driven Continuum manipulator Under External Uncertain Forces

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Journal of Bionic Engineering 2024年第2期21卷 821-841页

作者： Vipin Pachouri Pushparaj mani Pathak Indian Institute of Technology Roorkee Roorkee247667India

Continuum manipulators(CM)are soft and flexible manipulators with large numbers of degrees of freedom and can perform complex tasks in an unstructured ***,their deformability and compliance can deviate distal tip under uncertain external *** address this challenge,a novel tension-based control scheme has been proposed to modulate the stiffness of a tendon-driven CM,reducing the tip position errors caused by uncertain external *** minimize the tip position error,a virtual spring is positioned between the deviated and the desired tip *** proposed algorithm corrects the manipulator deviated tip position,improving tension distribution and stiffness profile,resulting in higher stiffness and better *** corresponding task space stiffness and condition numbers are also computed under different cases,indicating the effectiveness of the tension control scheme in modulating the manipulator's *** validation conducted on an in-house developed prototype confirms the practical feasibility of the proposed approach.

关键词： Continuum arm Hyper-redundant robots Variable stiffness.manipulator Tension-based control Mechatronic systems

Aerodynamic Characteristics of Conventional and Innovative High Lift swept Wings

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Journal of Bionic Engineering 2019年第3期16卷 432-441页

作者： Mojtaba Ramezani Voloojerdi Mahmoud mani Aerospace Engineering Department Amirkabir University of Technology 424 Hafez Ave Tehran 158757413 Iran

The new bird inspired wing sweep was introduced and compared with straight and conventional swept wings in gliding flight by an experimental test setup. Due to the similarity with the birds, wing, all test models have s1223 airfoil. swept models inspired from the bird consist of two parts: the straight part near the root and the swept part near the tip. Aerodynamic forces on each wing were measured from 0° to 24° angles of attack and Reynolds numbers of 4.3×10^4, 8.6×10^4, 1.3×10^5, and 1.7× 10^5. Wind tunnel test results show that wings with an innovative sweep at α> 0 have more lift for Reynolds numbers between 4.3× 10^4 and 8.6×10^4. Also, innovative sweep increases the stall angle, and the wing did not stall until α = 24° for Reynolds between 1.3×10^5 and 1.7×10^5. An increase in lift and having sufficient aerodynamic performance in low Reynolds numbers for birds' inspired wing sweep in gliding flight may be the answer to why the wing sweep of birds is not like conventional sweeps.

关键词： bio-inspired wing wing sweep wing aerodynamics bird wing low Reynolds number

single-phase Thirteen-level Dual-boost Inverter Based shunt Active Power Filter Control Using Resonant and Fuzzy Logic Controllers

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CsEE Journal of Power and Energy systems 2022年第3期8卷 849-863页

作者： shaik Gouse Basha Venkatesan mani subbarao Mopidevi Vignan's Foundation for science Technology and Research Andhra Pradesh522213India Vignan's Lara Institute of Technology and science Vadlamudi522213India

This paper addresses the power quality improvement of a single-phase utility grid using a thirteen-level dualboost inverter(TLDBI)-shunt active filter(sAF).The TLDBI uses a single DC source of low voltage magnitude and five switched capacitor arrangement to achieve self-balanced thirteen level output ***,the charging and voltage balancing of the capacitor is achieved by proper switching sequence control in a series,through which boosted inverter output voltage levels are *** with the tradional H-bridge multilevel inverters(MLIs),all the elements in the proposed TLDBI are able to withstand a voltage stress which is equal to the input DC *** feature ensures the performance of the proposed TLDBI in high-frequency *** power at the electrical grid is highly affected by a wide range of non-linear *** proposed sAF is used for measuring and controlling the current flow from source to *** difference between the targeted and actual currents from the utility grid is measured by using the modified synchronous reference frame(sRF)*** estimated error current is used by the controllers to predict the optimum suitable switching angle and modulation index(MI)to the *** this paper,the traditional proportional-integral(PI)controller,fuzzy logic controller(FLC)and proportional resonant controller(PRC)are compared and the results are presented to validate the performance of *** stability and robustness of the proposed controller is evaluated using Bode,Root locus,and Nyquist *** modeling and analysis of the proposed system are done using MATLAB/simulink *** simulation results are presented in the various MI of TLDBI and also subjected to non-linear load *** results are also compared to the claim novelty of the proposed study.

关键词： FLC power quality PRC thirteen-level DBI shunt active filter single-phase utility grid sRF

Effect of Orientation of Fibers and Holes on the Radial strain Amplification of Campaniform sensilla

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Journal of Bionic Engineering 2010年第4期7卷 314-320页

作者： Nickolas L.M.mani Carlo Menon MENRVA Research Group School of Engineering ScienceSimon Fraser University MENRVA Research Group School of Engineering Science Simon Fraser University

In this paper,a structural analysis is performed to gain insights on the synergistic mechanical amplification effect thatCampaniform sensilla have when combined in an array *** order to simplify the analysis performed in this preliminaryinvestigation,an array of four holes in a single orthotropic lamina is ***,a Finite Element Method(FEM) analysis is performed to discretely assess the influence that different geometrical parameters have on the mechanicalamplification properties of the ***,an artificial neural network is used to obtain an approximated multi-dimensionalcontinuous function,which models the relationship between the geometrical parameters and the amplification properties of ***,an optimization is performed to identify the geometrical parameters yielding the maximum mechanical ***,results are validated with an additional FEM simulation performed by varying geometrical parameters in theneighborhood of the identified optimal *** method proposed in this paper can be fully automated and used to solvea wide range of optimization problems aimed at identifying optimal configurations of strain sensors inspired by Campaniformsensilla.

关键词： Campaniform sensillum strain sensor FEM ANN optimization