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| 1 | SMFs-supported Pd nanocatalysts in selective acetylene hydrogenation:Pore structure-dependent deactivation mechanism显示文摘In the present study,CNFs,ZnO and Al2O3 were deposited on the SMFs panels to investigate the deactivation mechanism of Pd-based catalysts in selective acetylene hydrogenation reaction.The examined supports were characterized by SEM,NH3-TPD and N2adsorption-desorption isotherms to indicate their intrinsic characteristics.Furthermore,in order to understand the mechanism of deactivation,the resulted green oil was characterized using FTIR and SIM DIS.FTIR results confirmed the presence of more unsaturated constituents and then,more branched hydrocarbons formed upon the reaction over alumina-supported catalyst in comparison with the ones supported on CNFs and ZnO,which in turn,could block the pores mouths.Besides the limited hydrogen transfer,N2 adsorption-desorption isotherms results supported that the lowest pore diameters of Al2O3/SMFs close to the surface led to fast deactivation,compared with the other catalysts,especially at higher temperatures. | Elaheh Esmaeili Ali Morad Rashidi Yadollah Mortazavi Abbas Ali Khodadadi Mehdi Rashidzadeh | 2013 | Journal of Energy Chemistry2013，22，5： | 5 |
| 2 | 基于图像和飞行时间的基础设施三维重建技术比较显示文摘竣工空间数据在众多与建筑相关的应用方面颇为实用,例如质量控制和进度监控。这些数据可以通过使用多种基于图像和基于飞行时间的(例如激光扫描)传感器法来收集。每种应用都对数据的精度和质量水平有特定要求,但几乎没有什么信息可以帮助工程师选择最具成本效益的数据收集方法。本文对摄影测量法、摄像测量法和基于飞行时间法在精度、质量、时间效率和成本方面进行了分析和定量比较。为此,对具有代表性的基于图像的三维重建软件和商用硬件(两台相机和一台飞行时间激光扫描仪)进行了评价。使用不同的设置收集了典型基础设施(2座桥梁和1栋楼)的空间数据。实验参数包括成像传感器的相机类型、分辨率和拍摄距离。通过将这些数据与全站仪收集的地面实况进行比较,发现摄像/摄影测量可以产生中等精度和质量的结果,但成本比激光扫描低得多。所获得的信息有助于工程师做出具有成本效益的决策,并帮助研究人员更好地了解这些设置对传感器技术的性能影响。 | 蔡建国(译) Fei Dai Abbas Rashidi loannis Brilakis | 2021 | 四川建材2021，47，2： | 2 |
| 3 | Mass transfer investigation and operational sensitivity analysis of aminebased industrial CO_2 capture plant显示文摘In this article, the industrial process of CO_2 capture using monoethanolamine as an aqueous solvent was probed carefully from the mass transfer viewpoint. The simulation of this process was done using Rate-Base model, based on two-film theory. The results were validated against real plant data. Compared to the operational unit, the error of calculating absorption percentage and CO_2 loading was estimated around 2%. The liquid temperature profiles calculated by the model agree well with the real temperature along the absorption tower, emphasizing the accuracy of this model. Operational sensitivity analysis of absorption tower was also done with the aim of determining sensitive parameters for the optimized design of absorption tower and optimized operational conditions. Hence,the sensitivity analysis was done for the flow rate of gas, the flow rate of solvent, flue gas temperature, inlet solvent temperature, CO_2 concentration in the flue gas, loading of inlet solvent, and MEA concentration in the solvent. CO_2 absorption percentage, the profile of loading, liquid temperature profile and finally profile of CO_2 mole fraction in gas phase along the absorption tower were studied. To elaborate mass transfer phenomena, enhancement factor, interfacial area, molar flux and liquid hold up were probed. The results show that regarding the CO_2 absorption, the most important parameter was the gas flow rate. Comparing liquid temperature profiles showed that the most important parameter affecting the temperature of the rich solvent was MEA concentration. | Abbas Hemmati Hamed Rashidi | 2019 | Chinese Journal of Chemical Engineering2019，27，3： | 1 |
| 4 | Life cycle assessment of oxygen-18 production using cryogenic oxygen distillation显示文摘In this study, life cycle assessment of oxygen-18 by using cryogenic distillation of oxygen is performed using SimaPro 8.3 software. Life cycle assessment is performed to understand the environmental profile and hotspots of this process in order to be used in design and development. Simulation of oxygen-18 process is executed by Hysys software, and the required inputs and outputs for inventory of life cycle were acquired. By doing life cycle assessment and considering achieved results after characterization and normalization of inventory data it has been investigated that in the majority of environmental impacts electricity consumption has a huge contribution relative to other parts of the system like liquefied oxygen production from air separation unit,required facilities for air separation and oxygen-18 units, and needed transportation. Also, among 17 impact categories investigated in ReCiPe impact assessment method, fossil depletion, climate change(human health),particulate matter formation, climate change(ecosystem), human toxicity, and metal depletion have the most contribution in entire environmental loads respectively. Furthermore, sensitivity analysis showed that changing life cycle impact assessment method from ReCiPe to IMPACT 2002+ has no significant effect on acquired results and results are confident. In addition, assumption of market for depleted oxygen from heavy isotopes which is withdrawn from top of distillation columns showed some positive effects compared to first case and environmental impacts resulted from liquefied oxygen production(feed) reduced but because of huge contribution of electricity consumption compared to other sections, this positive effect has no remarkable influence on entire environmental loads of product system. | Meysam Akbarian Shourkaei Abbas Rashidi Javad Karimi-Sabet | 2018 | Chinese Journal of Chemical Engineering2018，26，9： | 0 |
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