Synthesis of Alumina Nanofibers and Composites

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PRODUCTION OF BIODIESEL FROM WASTE COOKING OIL (WCO) VIA HETEROGENEOUS CATALYSIS USING CHICKEN AND FISH BONE AS CATALYST

Due to rapid depletion of fossil fuel reserves as well as the environmental problem concerns, biodiesel has attracted the people globally on present of it. In this study, heterogeneous catalyst derived from chicken and fish bones were employed in transesterification reaction of waste cooking oil for biodiesel production. Besides, physicochemical properties of the synthesized catalyst will be studied using various techniques such Brunauer, Emmet, and Teller (BET) surface area analysis, Fourier Transform Infrared, and Scanning Electron Microscope. From analysis conducted, biodiesel yield obtained with the presence of chicken bone catalyst with highest value is 90.00% with methanol to oil ratio 30.00 wt.%, catalyst to oil ratio 4.00 wt.% and four hours of reaction time, respectively. On the other hand, hybrid ratio of chicken bone with fish bone 90.00 wt.% of chicken bone mixed with 10.00 wt% of fish bone obtained the highest biodiesel yield of 88.09% with methanol to oil ratio of 30.00 wt.%, catalyst to oil ratio of 4.00 wt.% at four hours of reaction time. From the calorific value test, the highest calorific value is measured from hybrid chicken bone and fish bone biodiesel consist of 70.00 wt.% of chicken bone mixed with 30.00 wt% of fish bone ratio with 38.337 MJ/Kg. Hence, from the study of different researches and experiment conducted, production of biodiesel using chicken and fish bone waste-derived catalyst has a bright future to promote green technology that can help to sustain environment for future generation. Keywords

Design and development of domestic cyclone dust collector system using TRIZ and CCD method

In conventional vacuum cleaners, filter media or filter bags are used to physically separate dust and debris from flowing air streams. However, in such systems, the vacuum cleaner's efficiency diminishes over time as more debris is accumulated on the filter surface. In this study, a two-stage cyclone dust collector system was proposed, which can be attached to existing vacuum cleaners. The system was designed and developed using the integrated Theory of Inventive Problem Solving (TRIZ) and Classical Cyclone Design (CCD) method. The TRIZ method was implemented during the idea generation stage, where specific design solution strategies were reviewed. Theoretical analysis of the selected design was carried out using Classical Cyclone Design (CCD) method. Finally, a full-scale working prototype of the cyclone dust collector was fabricated for evaluation. Based on results, the cyclone dust collector system provides more than 99% fractional efficiency and 96% overall collection efficiency for particles with an average diameter of over 50 μm. The pressure drops and airflow inside the cyclone dust collector were also analysed. The results suggest that the proposed cyclone dust collector system would provide better filtration efficiency and less maintenance compared to the conventional system