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- 저자 : Muhammad Yasin Naz (검색결과 2 건)
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Irshad Ahmad,Shazia Shukrullah,Muhammad Yasin Naz,Sami Ullah,Mohammed Ali Assiri 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-
Photocatalysis has emerged as a promising technology for solving global environmental and energy challenges. The selectivity of low-cost, non-toxic and thermochemically stable materials for photocatalyticapplications is crucial to meet the industrial standards. Despite of owing unique layered structure, distinctelectronic band structure and tunable optical properties, the bismuth oxyhalides BiOX (X = Cl, Brand I) photocatalytic materials suffer from rapid recombination of charge carriers and limited lightabsorption issues. These limitations restrict the photocatalytic efficiency and industrial applications ofBiOX materials. The focus of this critical review is to discuss recent developments in the design and modificationof existing and new BiOX materials for getting optimum photocatalytic response from thesematerials. The key elements of the review are BiOX synthesis methods, BiOX driven water splitting, singleand double stage hydrogen evolution systems, degradation of organic pollutants and trends of boostingthe photocatalytic efficiency of the BiOX materials. Finally, this insight discusses the existing issues andfuture perspectives of BiOX photocatalysts.
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Hydrodynamics of multi-sized particles in stable regime of a swirling bed
Chin Swee Miin,Shaharin Anwar Sulaiman,Vijay Raj Raghavan,Morgan Raymond Heikal,Muhammad Yasin Naz 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.11
Using particle imaging velocimetry (PIV), we observed particle motion within the stable operating regime of a swirling fluidized bed with an annular blade distributor. This paper presents velocity profiles of particle flow in an effort to determine effects from blade angle, particle size and shape and bed weight on characteristics of a swirling fluidized bed. Generally, particle velocity increased with airflow rate and shallow bed height, but decreased with bed weight. A 3o increase in blade angle reduced particle velocity by approximately 18%. In addition, particle shape, size and bed weight affected various characteristics of the swirling regime. Swirling began soon after incipience in the form of a supra-linear curve, which is the characteristic of a swirling regime. The relationship between particle and gas velocities enabled us to predict heat and mass transfer rates between gas and particles.
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