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Bi-metallic catalysts of mesoporous Al_2O_3 supported on Fe, Ni and Mn for methane decomposition: Effect of activation temperature

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Chinese Journal of Chemical Engineering 2018年第9期26卷 1904-1911页

作者： Anis H.Fakeeha ahmed S.Al-Fatesh Biswajit Chowdhury ahmed A.Ibrahim Wasim U.Khan Shahid Hassan Kasim Sasudeen ahmed elhag abasaeed Chemical Engineering Department College of Engineering King Saud University Department of Applied Chemistry Indian School of Mines

Methane decomposition reaction has been studied at three different activation temperatures（500℃,800℃ and950℃）over mesoporous alumina supported Ni–Fe and Mn–Fe based bimetallic *** co-impregnation of Ni on Fe/Al2O3the activity of the catalyst was retained even at the high activation temperature at 950℃ and up to180 *** Ni promotion enhanced the reducibility of Fe/Al2O3oxides showing higher catalytic activity with a hydrogen yield of 69%.The reactivity of bimetallic Mn and Fe over Al2O3catalyst decreased at 800℃ and 950℃ activation *** studies revealed that the catalyst could be effectively recycled up to *** addition of O2（1 ml,2 ml,4 ml）in the feed enhanced substantially CH4conversion,the yield of hydrogen and the stability of the catalyst.

关键词： Carbon nanotube Hydrogen production Methane decomposition Manganese promoter Nickel promoter

Detection of schistosomiasis antibodies in urine patients as a promising diagnostic maker

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Asian Pacific Journal of Tropical Medicine 2011年第10期4卷 773-777页

作者： Salma Medani elhag Eshtiyag Abdalla Abdelkareem Ashraf Siddig Yousif Ehab ahmed Frah ahmed Babiker Mohamed Department of Vector and Biomedical Studies Tropical Medicine Research InstituteNational Centre for ResearchKhartoumSudan Department of Immunology and Biotechnology Tropical Medicine Research InstituteNational Centre for ResearchKhartoumSudan National Centre for Research Ministry of Science and TechnologyKhartoumSudan

Objective:To determine secreted antischistosoma antibodies in urine and to discern the epidemiological situation of schistosomiasis in the agricultural field labourers’camps city in the Gezira State-central ***:Total of 66 urine and 66 serum paired samples were collected from those who confirmed parasitologically positive and negative with schistosomiasis from the two *** were tested using ELBA technique to measure and compare the immunoglobulin G(IgG) levels in serum and urine samples of schistosomiasis ***: The overall prevalence of *** and *** was 53.8%and 15.4%,while the intensity were(2.04 GMEC) and(0.9 GMEC) *** relative percentage of positive IgG individulas in urine was 92.40%where as 96.97%in *** no significant difference between the IgG levels in serum and urine samples was ***:This study shows that the detection of secreted IgG antibodies in urine can substitute serum for diagnosis of schistosomiasis.

关键词： Circulating antibodies Schistosomiasis Immunoglobulin G ELISA

助剂对甲烷干重整 Ni/γ-Al_2O_3催化剂性能的影响(英文)

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催化学报 2011年第10期32卷 1604-1609页

作者： ahmed S.A.AL-FATESH Anis H.FAKEEHA ahmed E.abasaeed Chemical Engineering Department College of EngineeringKing Saud UniversityP.O.Box 800Riyadh 1142Saudi Arabia

The Ni catalysts supported on γ-Al2O3 were synthesized by an impregnation *** catalytic performance in methane dry reforming was *** reforming reactions were carried out in a microreactor using a CO2:CH4 feed ratio of 1:1,a F/W = 2640 ml/(h·g),reaction temperatures between 500-850 ?C,and at atmospheric *** influence of Ca,Ce,and Zr promoters on catalyst stability,coke deposition,and the H2/CO ratio were also *** were analyzed using an online gas chromatograph equipped with a thermal conductivity *** spent and fresh catalysts were characterized by scanning electron microscopy and thermogravimetric *** was found that 3%Ni/γ-Al2O3 promoted with 0.15% Ce and 0.05% Ca gave the best performance and resulted in less coke *** highest CH4 and CO2 conversion activities were found to be 94.1% and 98.3% at 850 ?C,*** tests were carried out for 130 h and this provided a H2 yield of 91%.Moreover,the amount of formed carbon was negligible and did not increase to more than 1.5 wt%.

关键词：稳定性合成气焦碳合成方法

沸石负载Ni催化剂在甲烷干重整中的稳定性(英文)

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催化学报 2013年第4期34卷 764-768页

作者： Anis H. FAKEEHA Wasim U. KHAN ahmed S. AL‐FATESH ahmed E. abasaeed Chemical Engineering Department College of Engineering King Saud University

Ni/γ-Al2O3 , Ni/Y-zeolite, and Ni/H-ZSM-5 catalysts were prepared using the incipient wetness impregnation method. Their catalytic performance in dry reforming of methane was studied. The fresh and used catalysts and deposited carbon were characterized using H2 temperature-programmed reduction, temperature-programmed oxidation, N2 adsorption-desorption, X-ray diffraction, and thermogravimetric analysis. The H-ZSM-5-supported Ni catalyst proved to be more stable than the other two catalysts, as it had the lowest carbon deposition.

关键词： Carbon dioxide Dry reforming Methane Nickel catalyst H‐ZSM‐5 zeolite Carbon deposition

Effect of Sr loading on oxydehydrogenation of propane to propylene over Al_2O_3-supported V-Mo catalysts

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Journal of Energy Chemistry 2013年第5期22卷 778-782页

作者： Meilana Dharma Putra Saeed M.Al-Zahrani ahmed E.abasaeed Department of Chemical Engineering College of Engineering King Saud University

Incorporation of strontium into V-Mo alumina-supported catalyst enhanced its performance (increased conversion and selectivity,decreased reducibility and improved stability) in propane oxydehydrogenation to propylene.12.5% Sr loading was shown to be the optimum content to the V-Mo *** results were supported by various characterization techniques,namely,BET,XRD,SEM,FTIR and TPD.

关键词： oxydehydrogenation strontium vanadium-molybdenum oxides catalysts propane propylene loading

Role of La_2_O3 as Promoter and Support in Ni/γ-Al_2O_3 Catalysts for Dry Reforming of Methane

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Chinese Journal of Chemical Engineering 2014年第1期22卷 28-37页

作者： ahmed S.Al-Fatesh Muhammad A.Naeem Anis H.Fakeeha ahmed E.abasaeed Chemical Engineering Department College of Engineering King Saud University

The nature of support and type of active metal affect catalytic performance. In this work, the effect of using La203 as promoter and support for Ni/γ-A1203 catalysts in dry reforming of methane was investigated. The reforming reactions were carried out at atmosphenc pressure in the temperature range of 500-2700℃. The activity and stability of the catalyst, carbon formation, and syngas （H2/CO） ratio were determined. Various techniques were applied for characterization of both fresh and used catalysts. Addition of La2O3 to the catalyst matrix improved the dispersion of Ni and adsorption of CO2, thus its activity and stability enhanced.

关键词： CO2 methane reforming.Ni/γ-A12O3 La2O3 carbon deposition H2/CO

Protective Immunity of Attenuated Salmonella Typhimurium Co-Expressing Eimeria Tenella MIC2 and SO7 Genes

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Protective Immunity of Attenuated Salmonella Typhimurium Co-...

Immunogenic Characterizations of Eimeria Acervulina Csz1 Gene Expressed in Attenuated Salmonella Typhimurium

12th International Congress of Protozoology

作者： ahmed Bashar elhag School of Veterinary Sciences University of Nyala Sudan

＜正＞Micronemes are secretary organelles of the invasive stages of all apicomplexan parasites, and their proteins are crucial for parasite motility, adhesion and invasion to the host cell. The two twin bodies in apicomplexan sporozoites, those fuse shortly after invasion of the host cell and gradually disintegrates during the process of shizogany so as some of them to be carried by every first-stage merozoite, are known as the refractile bodies. Although the function of these bodies is not known yet, strong evidence

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Immunogenic Characterizations of Eimeria Acervulina Csz1 Gen...

Protective Effect on Eimeria parasites Infection of EnMIC2 and cSZ1 genes Administered Orally via Attenuated Salmonella typhimutium

12th International Congress of Protozoology

作者： ahmed Bashar elhag School of Veterinary Sciences Nyala University Sudan

＜正＞The ORF of an Eimeria acervulina （GD strain） the surface antigen gene, cSZ1 was amplified by PCR and ligated to plasmid pYA3342 to construct a recombinant plasmid pYA3342-cSZ1. Then this recombinant plasmid was transformed to Escherichia coll X6212. The positive recombinant plasmid identified by endonuclease digestion and PCR was electroporated into attenuated S. typhimurium X4550. The recombinart cSZ1 was expressed in Salmonella induced with 1 mM IPTG The recombinant cSZ1

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Protective Effect on Eimeria parasites Infection of EnMIC2 a...