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- 저자 : Zahira Yaakob (검색결과 2 건)
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Manoj Pudukudy,Zahira Yaakob,Khaleeda Mhd Syahri,Qingming Jia,Shaoyun Shan 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.84 No.-
A set of Fe/ZrO2 catalysts were successfully synthesized by a facile urea-assisted solid-state combustionmethod, and their catalytic test was evaluated for the thermal decomposition of undiluted-biogas intohydrogen-rich syngas and multiwalled carbon nanotubes (MWCNTs). The as-prepared catalysts werecharacterized by X-Ray diffraction (XRD), Scanning and Transmission electron microscopy (SEM andTEM), Nitrogen-physisorption, X-ray photoelectron spectroscopy and Temperature programmedreduction analyses. The iron was found in the form of hematite and metallic-iron in the fresh andreduced catalysts respectively. A suitable metal-support interaction due to thefine surface dispersion ofiron species on ZrO2 was observed in the catalysts. The N2-physisorption analysis indicated the reducedsurface area of the catalysts after iron loading. However, it does not influence the catalytic efficiency sincethe metal amount and metal-support interaction was determined to play the main role. The Fe/ZrO2catalysts exhibited improved catalytic efficiency. With increasing the amount of iron and increasing thereaction temperature, the CH4 and CO2 conversions were increased significantly. A highest CH4 and CO2conversions of 92% and 89% respectively, with an H2/CO ratio of2.25 were obtained for the 50%Fe/ZrO2catalyst at 900 C. The enhanced catalytic performance could be attributed to thefine-surface dispersionof iron-nanocrystals on ZrO2. Moreover, the MWCNTs were characterized by XRD, SEM, TEM and Ramananalyses for their structural properties.
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M. Moniruzzaman,Nurina Anuar,Zahira Yaakob,A. K. M. Aminul Islam,J. M. Al-Khayri 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.5
Common fi g ( Ficus carica L.), an economically-important fruit species widely cultivated in the Mediterranean Basin, is gainingincreasing interest in the tropical and subtropical regions. A vast genetic diversity of common fi g is available; however,systematic studies of cultivar performance in a particular new environment are scarce. The objective of this study was toevaluate the performance of 17 common fi g cultivars grown under the Malaysian tropical climate. Evaluation was based on15 parameters relevant to fruit yield, fruit quality and pest susceptibility. The results showed variable performance amongthe cultivars tested; 10 cultivars performed well for orchard establishment. Cultivar ‘A134’ produced the highest fruit yieldper plant (3410 g) compared to the average yield of the cultivars studied (2500 g). Cultivars ‘Fen Chan Huang’ and ‘Wuhan’produced the highest number of fruits per plant, 119 and 82 fruits, respectively. Mealybug infestation and ostiole-end splittingare major limitations to fi g cultivation in Malaysia. Cultivar ‘Longue d’Aout’ was the most susceptible to mealybuginfestation; whereas cultivar ‘B110’ was the most resistant. Above 60% of the fruits of cvs. ‘Brunswick’ and ‘Qing Pi’ hadsplit ostiole; however, this was less than 20% in cvs. ‘Longue d’Aout’ and ‘Alma’. This study facilitates successful farmingof fi gs in Malaysia and provides insights for future development programs.
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