Abstract: Production of biodiesel from Physic nut (Jatropha curcas L.) extraction creates agricultural waste. In this study, utilization of this waste was investigated as a potential source of energy while reducing the costly management and control of this waste which may otherwise result in land and water pollutions. The objectives of this work were to investigate the effects of catalysts and pyrolysis conditions, such as reactor temperature, and residence time, on catalytic pyrolysis of Physic nut waste by using a drop tube reactor. Particle size of raw material and temperature of the reactor were varied from 0.425-1 mm. and 600-900ºC, respectively while nitrogen carrier gas flow was kept at 2 L/min. The catalytic effect on liquid yields was identified by comparison with non-catalytic (NC) pyrolysis and char-catalytic (CC) pyrolysis. The distribution of gas, liquid and char with non-catalytic (NC) and char-catalytic (CC) were 50.20, 15.07, 34.73 wt% and 61.21, 18.73, 20.07 wt%, respectively at

• Publication Date: 09-Mar-2014
• DOI: 10.15224/978-1-63248-001-9-10
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Abstract: In this research, response surface methodology (RSM) was applied to model the effect of main operational variables including initial pH, initial nitrate concentration, applied current, electrode number and reaction time on the operation cost of nitrate removal by electrocoagulation. It was found that the initial pH, initial nitrate concentration and applied current are the most effective parameters on the model. According to the ANOVA (analysis of variance) results, the model presented high R2 value of 95% for operation cost, which indicates that the accuracy of the polynomial model is acceptable. It can be concluded that RSM is a powerful tool for simulation of operation cost in electrocoagulation process for nitrate removal.

• Publication Date: 09-Mar-2014
• DOI: 10.15224/978-1-63248-001-9-11
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