Corncob Lab Report

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3.1 Biomass characterization. The characteristics of corncob was shown in Table 1. The proximate analysis result showed that the volatile matter of corncob as 82.87 wt% which be exhibiting to the main mass loss in the pyrolysis process. The ultimate analysis result shown to the chemical components of corncob, high content of aliphatic hydrocarbon compounds was indicated by high of the H/C molar ratio and low amount of polar compounds was presented by low value of the O/C molar ratio. The HHV of corncob was rather low (17.71 MJ kg-1) when compared with a fossil fuel as coal (24.00 MJ kg-1).14
Table 1 Characterization of biomass samples.

3.2 The effect of pyrolytic temperature. The result of yield and composition of bio-char from corncob in the
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SEM micrograph of bio-char product at a holding time of 1 hr (A) and 2 hr (B)
3.5 Energy consumption ratio and energy recovery of the production. The energy consumption ration (ECR) and Energy Recovery were selected for evaluated the effectiveness of bio-char production. The ECR was defined by Minowa and co worker25 that was the following;
ECR = [WCpw (T – Ti)+(1 – W)Cps(T – Ti)]/ [HcharYchar], where Hchar and Ychar are the heating values and the yields of the bio-char, respectively; W is the moisture content; T and Ti are the reaction and initial temperatures, respectively; Cpw and Cps are average specific heats of water and the dry solids, respectively. Dividing the energy required to heat the raw material up to reaction temperature by the available energy of the bio-char that is produced which could obtain to the ECR. The net energy production should be required to the ECR is lower than one, then the overall energy contained to produce the bio-char is higher than the energy consumption in the produced fuel.13 Energy recovery of bio-char production was forecast by the proportion of the energy carried by bio-char produced with the energy contained in corncob14 that was the

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