Browsing by Author "Birhan, Gebregziabher"
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Item The Assessment of Peanut shell and Chat stem as Alternative Energy Source for Cement Industries(AAU, 2018-10) Birhan, Gebregziabher; Shimelis, Kebede (PhD)Cement industries are one of the major energy-intensive industries and heavy polluting process. To reduce the energy cost and environmental impact, cement producers are currently using alternative fuels. This study analyzed the assessment of peanut shell and chat stem as alternative energy source for cement industries. The main objective of this study was to carbonized mixed of a peanut shell and chat stem. The parameters of carbonization process, which affect the calorific value such as temperature (350, 450 and, 450 o C), time (60, 90 and 120min) and mixing ratio (25, 50 and 75%) were optimized via Central Composite Design (CCD). All the necessary analysis that included physiochemical characteristics of peanut shell and chat stem, mixed carbonized and mixed carbonized pellet, then the results were compared with commercial coal. In addition, thermogravimetric analysis were examined the thermal property of peanut shell and chat stem. Based on the result, the optimal conditions were (temperature at 450 o C, time for 60min and mixed ratio 75%) with a maximum calorific value of 6552.6 Cal/g. However, the energy content of sample was comparable with coal, but it needs pellet for suitable storage, handling, transporting. Then the optimum mixed carbonized pellet with 10% of molasses, the calorie develop to 6838.19cal/g. The optimum mixed carbonized pellet showed a decrease in moisture content (2.87%), volatile content (30.75%), Hydrogen (2.95%) and Oxygen (26.19%) while the fixed carbon (57.57%), and carbon (70.86%) increased considerably. Therefore, in this study shows that the mixed carbonized pellet has potential replaced coal as an alternative energy source for cement production due to their calorific value at optimum carbonation condition.