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Ozonation of o-phenylenediamine in the presence of hydrogen peroxide by high-gravity technology

Chinese Journal of Chemical Engineering 2018年第3期26卷 601-607页

作者： moses arowo Zemeng Zhao Guangjun Li Guangwen Chu Baochang Sun Lei Shao State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 China Department of Chemical & Process Engineering Moi University 3900-3100 Eldoret Kenya Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical Technology Beijing 100029 China Beijing Yanjing Beer Co. Ltd. Beijing 101300 China

The study herein investigated the effectiveness of simultaneous use of ozone and hydrogen peroxide(O_3/H_2O_2 process) to degrade o-phenylenediamine(o-PDA) in a simulated wastewater. A rotor–stator reactor(RSR) was employed to create a high-gravity environment in order to enhance ozone-liquid mass transfer rate and possibly improve the degradation rate of o-PDA. The degradation efficiency of o-PDA(η) as well as the overall gas-phase volumetric mass transfer coefficient(KGa) were determined under different operating conditions of H_2O_2 concentration, initial o-PDA concentration, temperature of reaction, initial p H and rotation speed of RSR in attempt to establish the optimal conditions. Chemical oxygen demand reduction rate(rCOD) of wastewater treated at a particular set of conditions was also analyzed. Additionally, the intermediate products of degradation were identified using a gas chromatography-mass spectrometer(GC/MS) to further evaluate the extent of o-PDA degradation as well as establish its possible degradation pathway. Results were validated by comparison with those of sole use of ozone(O_3 process), and it was noted that η, KGa and rCODachieved by O_3/H_2O_2 process was 24.4%,31.6% and 25.2% respectively higher than those of O_3 process, indicating that H_2O_2 can greatly enhance ozonation of o-PDA. This work further demonstrates that an RSR can significantly intensify ozone-liquid mass transfer rate and thus provides a feasible intensification means for the ozonation of o-PDA as well as other recalcitrant organics.

关键词： Degradation Environment Organic compounds Oxidation Ozone Rotor-stator reactor

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Sulfonation of 1,4-diaminoanthraquinone leuco by chlorosulfonic acid:Kinetics and process intensification

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Chinese Journal of Chemical Engineering 2023年第6期58卷 163-169页

作者： Bing Liu Yingjiao Li moses arowo Guangwen Chu Yong Luo Liangliang Zhang Haikui Zou Baochang Sun State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China Department of Chemical&Process Engineering Moi UniversityEldoret 3900-30100Kenya

The work herein employed a rotating packed bed(RPB)to intensify the sulfonation process of 1,4-diaminoanthraquinone leuco(DL)in an attempt to improve the yield of the product 1,4-diaminoanthra quinone-2-sulfonic acid(DSA).First,the effects of operating conditions in a stirred tank reactor(STR),including stirring speed,chlorosulfonic acid/DL molar ratio(η),solvent/DL mass ratio(ζ),reaction temperature and dropping speed of chlorosulfonic acid,on the yield of DSA were *** yield of DSA can reach 87.34%under the optimal operating conditions:stirring speed of 500 r·min^(-1),ηof 4.5,ζof 7,reaction temperature of 150℃,dropping speed of 0.61 ml·min^(-1).In addition,the kinetics of the sulfonation process via the shrinking core model revealed that the reaction is controlled by diffusion via a product layer under the reaction temperature of 140℃.Furthermore,the RPB was employed to intensify the mass transfer between liquid and solid phases during the sulfonation reaction *** results showed that the DSA yield of 92.69%obtained by RPB was 5.35%higher than that by STR,indicating that RPB can significantly intensify the mass transfer in the liquid-solid phase sulfonation reaction process.

关键词： Sulfonation 1 4-Diaminoanthraquinone-2-sulfonic acid Kinetics Rotating packed bed(RPB) Chlorosulfonic acid

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旋转泡沫填料反应器的研究进展

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化工进展 2018年第6期37卷 2046-2052页

作者：杨宇成杨时颖 moses arowo 华侨大学化工学院化工与制药系福建厦门361021 莫伊大学化学工程与工艺系埃尔多雷特肯尼亚390030100

旋转泡沫填料反应器是一种新型多相搅拌釜式反应器,其将传统的搅拌桨替换成圆环型泡沫填料,可有效强化反应器内多相间传质混合过程,且多孔填料可作为催化剂载体,能减小多相催化反应中固体催化剂的使用量,具有替换传统多相搅拌釜式反应... 详细信息

旋转泡沫填料反应器是一种新型多相搅拌釜式反应器,其将传统的搅拌桨替换成圆环型泡沫填料,可有效强化反应器内多相间传质混合过程,且多孔填料可作为催化剂载体,能减小多相催化反应中固体催化剂的使用量,具有替换传统多相搅拌釜式反应器和浆态反应器的潜力,将有较好的应用前景。本文详细阐述了旋转泡沫填料反应器的结构和反应器内多相流动形式,着重介绍了反应器内多相流动特性的研究进展及反应器内传质性能的研究现状,并与传统的多相反应器传质性能进行比较;从应用方面分析了反应器用于葡萄糖催化氧化、苯乙烯催化加氢等多相过程的强化方式及优势,通过对比得出旋转泡沫填料反应器能有效降低化工过程中物耗、提高物料的利用率;介绍了与旋转泡沫填料反应器类似的其他多孔式搅拌桨反应器的研究进展,分析了这类反应器的优势,并对其性能进行对比;最后,对旋转泡沫填料反应器研究的不足及未来的发展进行了阐述和展望。

关键词：旋转泡沫填料反应器多相反应器多相流传质催化

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旋转填充床中制备ZnO/TiO2纳米光催化剂的研究

旋转填充床中制备ZnO/TiO2纳米光催化剂的研究

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作者：穆斯（arowo moses）北京化工大学

学位级别：硕士

旋转填充床(RPB)是一种利用转子高速旋转产生的离心力场来模拟超重力环境的设备。在其产生的超重力环境中,巨大的剪切力将液体撕裂成为微米甚至纳米级的液滴、液丝以及液膜,产生巨大的和快速更新的相际面,使得超重力设备内的传质与微观... 详细信息

旋转填充床(RPB)是一种利用转子高速旋转产生的离心力场来模拟超重力环境的设备。在其产生的超重力环境中,巨大的剪切力将液体撕裂成为微米甚至纳米级的液滴、液丝以及液膜,产生巨大的和快速更新的相际面,使得超重力设备内的传质与微观混合过程得到了极大的强化,并且成核过程在微观混合均匀并且具有极高过饱和度的环境中进行,从而使得成核过程可控,粒度分布窄化,最终提升所制备材料的性能。本课题的目标是利用RPB合成ZnO/TiO2复合纳米光催化剂,并通过降解罗丹明B(RhB)染料废水来评价所得催化剂的催化活性。X射线衍射分析(XRD)与场发射扫描电镜(FESEM)等手段被用来表征制备的催化剂。实验结果表明,锌钛摩尔比、盐溶液浓度、RPB转速以及进RPB的液体体积流量等因素会对催化剂的活性造成影响。通过对比超重力反应器(RPB)与搅拌釜反应器(STR)制备的ZnO/TiO2复合纳米光催化剂的性能发现,使用RPB制备的催化剂具有更好的形态及更高的催化活性。利用所制备的催化剂降解罗丹明B的实验表明,采用紫外光辐照3小时后,罗丹明B染料的降解率可以达到99.3%,而采用STR在相同条件下则只能达到81.6%。因此,本课题提供了一种简便并且易于大规模制备具有较高活性ZnO/TiO2复合纳米光催化剂的方法。

关键词： RPB ZnO/TiO2 光催化剂光催化活性

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Investigations of the Sheath Effect on the Resultant Magnetic Field of a Cylindrical Monopole Plasma Antenna

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Plasma Science and Technology 2015年第2期17卷 153-158页

作者： moses E.EMETERE Department of Physics Covenant University Canaan Land

The functionality of the plasma antenna has been narrowed to types and brand names only. The physics of its operation has been neglected and has stagnated technological innovations. The magnetic field in the sheath and plasma were investigated. Notable specifications were worked out in the proposed improved cylindrical monopole plasma antenna. The occurrence of femto spin demagnetization was discovered between the duration of switch on and switch off of the antenna. This phenomenon seems transient because magnetization is highest at the switch on/off point.

关键词： cylindrical monopole plasma antenna magnetic field size Schr6dinger spin

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Yttrium cuprates modification in linear generator application for power generation

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Clean Energy 2024年第5期8卷 229-240页

作者： moses Eterigho Emetere Physics Department Bowen UniversityIwoOsun StateNigeria Department of Mechanical Engineering Science University of JohannesburgAPK CampusJohannesburgSouth Africa

Yttrium barium copper oxide(YBCO)is used for special applications in linear generators because of its excitation loss,lower weight,and higher *** qualities enable the compound to operate better than the conventional copper wire coil in the stator unit of the linear ***,the continuous use of YBCO in linear generators has a fundamental challenge that affects industrial production and material stability after prolonged *** paper seeks to sustain the adoption of YBCO by improving its quality for linear generator *** yttrium cuprates modification(YBYbCO)was synthesized using the solid-state reaction technique by doping YBCO with *** crystalline structure,microstructural pattern,and stability of the new sample were adequately measured and found to be structurally stable to ensure *** was reported that applyingYBYbCO in the linear generator would lead to a 200%increase in energy *** higher number of particles and lower individual particulate resistance enable it to withstand chemical pressure,thereby prolonging the lifespan of the linear generator.

关键词： microstructure YBCO structure linear generator cuprates clean energy SDG7

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On the role of geometry in geo-localization

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Computational Visual Media 2021年第1期7卷 103-113页

作者： Moti Kadosh Yael moses Ariel Shamir Department of Electrical Engineering Tel-Aviv UniversityTel-AvivIsrael The Efi Arazi School of Computer Science The Interdisciplinary Center HerzliyaHerzliyaIsrael

Consider the geo-localization task of finding the pose of a camera in a large 3 D scene from a single *** existing CNN-based methods use as input textured *** aim to experimentally explore whether texture and correlation between nearby images are necessary in a CNN-based solution for the geo-localization *** do so,we consider lean images,textureless projections of a simple 3 D model of a *** only contain information related to the geometry of the scene viewed(edges,faces,and relative depth).The main contributions of this paper are:(i)to demonstrate the ability of CNNs to recover camera pose using lean images;and(ii)to provide insight into the role of geometry in the CNN learning process.

关键词： geo-localization geometry CNN-based solutions synthetic lean images

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Thermal bleaching of optical absorption and photoluminescence spectra of γ-irradiated CaF_2:Dy:Pb:Na single crystals

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Journal of Rare Earths 2010年第4期28卷 493-497页

作者： S.M. moses Kennedy Department of Physics S.S.N. College of Engineering Rajiv Gandhi Salai Kalavakkam-603 110 Chennai Tamil Nadu India

The variation of the optical absorption (OA) and photoluminescence (PL) spectra with temperature was studied on γ-irradiated CaF2:Dy:Pb:Na single crystals. The OA spectrum showed bands around 2.05, 3.20, 3.82 and 6.20 eV which could be attributed to different sodium associated (SA) colour centres (CCs) such as MNa and RA+ . Heating the crystal indicated the annihilation and formation of different SACCs. The excitation spectrum for the characteristic Dy3+ emission at 2.14 eV immediately after irradiation was...

关键词： calcium fluoride optical absorption photoluminescence colour centres dysprosium lead sodium rare earths

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Thermoluminescence studies on γ-irradiated CaF_2:Dy:Pb:Na single crystals

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Journal of Rare Earths 2009年第2期27卷 187-191页

作者： S.Masilla moses Kennedy Department of Physics SSN College of EngineeringSSN NagarRajiv Gandhi SalaiChennai-603 110Tamil Nadu India

Therrnoluminescence （TL） glow, thermoluminescence emission （TLE） and thermal decay （TD） of optical absorption （OA） bands were studied on γ-irradiated CaF2：Dy （0.010at.%）：Pb （0.188at.%）：Na （0.026at.%） single crystals （hereafter called crystal-I）. The TL glow exhibited four glow peaks in the temperature region 300-500 K. The TL response with dose was studied up to -7.5 kGy. The total glow showed linear, supra linear and exponential growth with dose. The TLE showed bands characteristic of Dy^3＋ ions （around 1.65, 1.87, 2.18 and 2.63 eV） and sodium associated （SA） colour centres （CCs） such as MNa （around 1.67 eV） and XNa （a new SA CC, with an emission band around 2.63 eV）. The OA bands of MNa CC around 3.23 and 2.07 eV were found to decrease with temperature almost in accordance with the TL glow. The R＋A centre absorption around 2.48 eV was found to grow with temperature initially and then decayed. The formation/growth of the CCs R＋A and XNa might be from the conversion of the irradiation produced CC MNa. An attempt was made to explain the TL mechanism in the present system.

关键词： CaF2:Dy:Pb:Na thermoluminescence thermoluminescence emission colour centres rare earths

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Suitability mapping for rice cultivation in Benue State,Nigeria using satellite data Fanan Ujoh

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Geo-Spatial Information Science 2019年第4期22卷 332-344,I0009页

作者： Fanan Ujoh Tertsea Igbawua moses Ogidi Paul Centre for Sustainability and Resilient Infrastructure and Communities London South Bank UniversityLondonUK Department of Physics Federal University of AgricultureMakurdiNigeria Department of Geography and Environmental Management University of AbujaAbujaNigeria

With rising population,decline in soil productivity and land-based conflicts,the per-capita land availability for cultivation is rapidly decreasing within Benue State,a largely agrarian and small-holder *** study attempts a local-level support for the actualisation of Sustainable Development Goal Number 2(“end hunger,achieve food security and improved nutrition,and promote sustainable agriculture”)by *** Multi-Criteria Decision Making(MCDM)method,remote sensing data from Climate Research Unit(CRU)and in-situ data from Nigeria Meteorological Agency(NIMET)were analyzed by GIS techniques to map the suitability of rice cultivation in the study area,with the integration of Normalized Difference Vegetation Index(NDVI),land cover,slope,temperature,precipitation and soil parameters(cation exchange capacity,pH,bulk density,organic carbon).We apply the various statistical parameters that include mean spatial NDVI;correlation coefficient,standard deviation and Root Mean Square(RMS)between CRU and NIMET *** regression trend analysis is conducted between CRU precipitation and NDVI and between CRU temperature and NDVI from 1985 to *** results reveal that NDVI in highly suitable rice planting regions is higher than marginally suitable regions except in the months of October and November,which shows that the highly suitable regions will yield better than the marginally suitable regions during the dry ***,NDVI is seasonally bimodal in response to precipitation,meaning that vegetation vigor is more dependent on precipitation than ***,the correlation coefficient,standard deviation and RMS between CRU and NIMET precipitation data shows 0.42,108,and 110,respectively,while these three factors between CRU and NIMET temperature data shows 0.88,1.60,and 0.86,*** conclusion,the MCDM approach reveals that upland is more suitable for rice cultivation in Benue State when comparing with the area provided by the Global Land

关键词： CRU data NIMET data rice cultivation suitability mapping Sustainable Development Goals(SDGs) Benue State

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