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通过高温裂解酚醛树脂制备气体分离用炭膜——裂解温度及臭氧后处理的作用分析(英文)

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新型炭材料 2013年第1期28卷 39-46页

作者： Mohammad Mahdyarfar Toraj Mohammadi ali mohajeri Gas Research Division Research Institute of Petroleum IndustryWest Blvd.Azadi Sport ComplexTehranIran Research Center for Membrane Separation Processes Chemical Engineering DepartmentIran University of Science and Technology (IUST)NarmakTehranIran

炭膜可以通过各种前驱体,如酚醛树脂的高温裂解方法制备。该过程中,裂解条件对炭膜的性质有较大影响。研究不同裂解温度及臭氧后处理对炭膜的孔隙率及气体吸附行为的影响。结果表明,当裂解温度升高(由500℃提高到800℃),炭膜的平均孔径... 详细信息

炭膜可以通过各种前驱体,如酚醛树脂的高温裂解方法制备。该过程中,裂解条件对炭膜的性质有较大影响。研究不同裂解温度及臭氧后处理对炭膜的孔隙率及气体吸附行为的影响。结果表明,当裂解温度升高(由500℃提高到800℃),炭膜的平均孔径减小,孔体积与气体吸附能力先增大后减小。在800℃下,炭膜表现出分子筛的分离性能。臭氧后处理过程使炭膜孔径增大,气体吸附效率及动态吸附选择性降低,弱化了炭膜的分离性能。

关键词：碳分子筛酚醛树脂炭膜气体分离臭氧

支撑炭膜制备过程中的缺陷形成与避免(英文)

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新型炭材料 2013年第5期28卷 369-377页

作者： Mohammad Mahdyarfar Toraj Mohammadi ali mohajeri Research center for membrane separation processes Chemical engineering departmentIran university of science and technology (IUST) Gas research division Research institute of petroleum industryWest Blvd. Azadi Sport Complex

以酚醛树脂为前驱体在多孔石墨上制备了支撑炭膜。以树脂溶液涂覆支撑物表面,然后干燥、固化和炭化。涂膜-炭化的第一次循环不能有效地减小炭膜的缺陷。采用多次涂层、低冷却速率、低温和短时炭化(500℃,10 min),可同时降低一定程度的... 详细信息

以酚醛树脂为前驱体在多孔石墨上制备了支撑炭膜。以树脂溶液涂覆支撑物表面,然后干燥、固化和炭化。涂膜-炭化的第一次循环不能有效地减小炭膜的缺陷。采用多次涂层、低冷却速率、低温和短时炭化(500℃,10 min),可同时降低一定程度的缺陷。因此炭膜的选择性能显著提高。

关键词：气体分离炭膜酚酸树脂缺馅形成缺馅避免

费托合成反应中纳米铁催化剂上La和Ba助剂的协同效应(英文)

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催化学报 2012年第7期33卷 1119-1124页

作者： Yahya ZAMANI Mehdi BAKAVOLI Mohamad RAHIMIZADEH ali mohajeri Seyed Mohamad SEYEDI Department of Chemistry Ferdowsi University of MashhadAzadi SquareMashhad91735-48974Iran Research Institute of Petroleum Industry(RIPI) National Iranian Oil Company West Blvd. Near Azadi Sports Complex P.O.BOX 14665-137TehranIran

Effect of promoters such as Barium and Lanthanum has been investigated on the conventional nanostructured iron catalyst in Fischer-Tropsch synthesis (FTS). The nanosized iron-based catalysts were prepared by a microemulsion method with the general formulation of 100Fe/4Cu, 100Fe/4Cu/2La, 100Fe/4Cu/ 1La/1Ba, and 100Fe/4Cu/2Ba. The phase, structure, and morphology of the catalysts were characterized by X-ray diffraction, N2 adsorption, transmission electron microscopy, temperature-programmed desorption of CO2, and temperature- programmed reduction. The results indicated that the addition of promoters could improve the activity of Fe catalysts for FTS and WGS (water-gas shift reaction) and lower the gas fraction at the outlet. In addition, both Ba- and La-promoted Fe catalysts exhibit the highest activity due to the synergetic effect.

关键词：纳米结构铁催化剂协同作用 Ba 合成透射电子显微镜水煤气变换反应 Fe催化剂

姜黄根提取物对甲氨蝶吟诱导的肠损伤及氧化应激的保护作用(英文)

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中国天然药物 2013年第5期11卷 477-483页

作者： Adel Rezaei Moghadam Daryoush mohajeri ali Namvaran-Abbas-Abad Hamed Manafi Delavar Shahi Mohammad Mazani Young Researchers Club Ardabil BranchIslamic Azad University Faculty of Veterinary Medicine Tabriz BranchIslamic Azad University Department of Pathobiology Faculty of Veterinary MedicineTabriz BranchIslamic Azad University Young Researchers and Elite Club Tabriz BranchIslamic Azad University Department of Biochemistry Ardabil University of Medical Science

AIM:The most important side effect of methotrexate(MTX)is *** purpose of this study was to evaluate the effect of turmeric extract on intestinal damage and oxidative stress in rats receiving ***:Experiments were performed on male Wistar albino rats divided into six *** group received normal saline orally,the second group received turmeric extract(100 mg·kg-1)orally for 30 days,the third group received turmeric extract(200 mg·kg)orally for 30 days,the fourth group received a single dose of methotrexate(20 mg·kg)*** day 30,the fifth group received turmeric extract(100 mg·kg)orally for 30 days and a single dose of methotrexate(20 mg·kg)*** day 30,and the sixth group received turmeric extract(200 mg·kg)orally for 30days and single dose of methotrexate(20 mg·kg)*** day *** days after methotrexate injection,animals were anesthetized,blood samples were taken to determine total antioxidant status(TAS)and jejunum samples were taken for glutathione peroxidase(GPx),superoxidase dismutase(SOD),catalase(CAT),aldehyde malondialdehyde(MDA),and histopathological ***: Microscopic evaluation from intestinal tissues of the MTX treated group,showed severe villus shortening and blunting,inflammatory cell infiltration and hemorrhage in lamina propria,along with epithlial cell *** of SOD,GSH-Px and CAT decreased in the MTX received group,but increased significantly(P<0.05)in the turmeric+MTX *** increased lipid peroxidation,however,turmeric decreased peroxidation significantly(P<0.05).CONCLUSION:These results suggest that turmeric extract may protect the small intestine of rats from methotrexate-induced *** effects could result from its antioxidant properties.

关键词： Turmeric Methotrexate Intestinal damage Oxidative stress

Interactive Optimization of Impressive Parameters Middling in Biological Leaching

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Journal of Chemistry and Chemical Engineering 2011年第4期5卷 336-347页

作者： Sirous Nazari Perchestan Mohammad Soleimani alireza Najafi Aidin Sadeh Sinaki Fahimeh Nemati Morteza mohajeri Amiri ali Navabzade Kamran Jafari Mohammad Taghi Moazed Islamic Azad University Ahvaz 6349-68875 Iran Department of Chemical and Petroleum Engineering Sharif University of Technology Tehran 11365-11155 Iran Chemical and Petroleum Engineering School Shiraz University Shiraz 71345 Iran Islamic Azad University Omidiyeh Branch 63731-93719 Iran Islamic Azad University North Tehran Branch 16679-34783Iran Islamic Azad University Karaj Branch 31485-313 Iran

In this study, single and interactive effect of three parameters, pH, ferrous and pulp concentration has been investigated by a 2^3 full factorial CCRD （central composite rotatable design） composed of eight factorial points, six central and six axial points. Initially, ＂none＂ mode from transformation subsection was chosen as the default choice for both responses, i.e. %recovery and gram of recovered zinc. Box-Cox plots give the best Lambda for each response （y^Lambda= f （A, B, C .....）） which occur at 1.91 and 2.16 for %recovey and gram of recovered zinc, respectively. A linear （y^1.91 = f （linear）） and a quadratic （y^2. 16= f （quadratic）） equation were suggested by software as the model for %recovery and gram of recovered zinc, respectively. Analysis of variance （ANOVA） for both models shows a high coefficient of determination （R^2）. In order to optimize and find the best conditions under which three parameters occur appropriately, optimization was done numerically. Desirability plots indicate properly that the best conditions occur at pH = 1.46, ferrous = 6.67 g/L, %pulp = 7.1 （%w/v）, %recovery = 86.5, gram of recovered zinc = 0.63 g and desirability = 0.777. Finally, PRP （progressive route of the process） analysis donates us a proper insight of what is happening during these 30 days. PRP analysis categorizes flasks in two parts, 1- flasks worth economically, 2- flasks with one-time-usable feed materials.

关键词： Central composite rotatable design (CCRD) response surface methodology (RSM) impressive bioleaching parameters optimization progressive route of the process analysis.