Energy and Environmental Analysis (EEA) of a 100 tpd waste jute pyrolysis plant: Parametric Sensitivity of Energy Return on Energy Investment (EROEI) and CO2 Avoidance (ACO2)
The results of Aspen Plus® modelling of a simulated 100 tpd pyrolysis plant of jute waste have been used to perform its EEA. The ASPEN model using the combination of sequential primary and secondary pyrolysis reactions, has been validated by the comparison with the results of a lab scale (100 g/h) pyrolyzer. This has been further extended for the assessment of energy generation and CO2 emission footprints of a 100 tpd integrated pyrolysis unit utilizing pyro-gas and a fraction (f) of pyro-char for supplying energy of drying and pyrolysis, the rest fraction of pyro-char for the deposition in an agricultural field for the reduction of N2O emission from N-fertilizer and pyro-oil for energy generation in an oil-based power plant. The CO2 emission caused due to transportation of pyro-oil and pyro-char to the power plant and agricultural field respectively has also been accounted. The response surface methodology has been followed for the sensitivity analysis of energy return on energy investment (EROEI) and CO2 avoidance (ACO2) with respect to pyrolysis temperature, T and fraction of char deposited in agricultural field. While the maximum value of EROEI of 79.9 % has been obtained at T=900oC and f = 0.2, the maximum value of (ACO2) of 1081 g/KWh has been obtained at T=589.4oC and f = 0.2495. At the conditions of maximum EROEI and (ACO2) the values of the latter and the former are 1050 g/KWh and 79% respectively.
Energy Analysis, Environmental Analysis, Parametric Sensitivity, Energy Return on Energy Investment, CO2 Avoidance.