Detailed parametric investigation of dry gasification oxy-combustion power cycle using ASPEN Plus simulations

Abstract

Dry gasification oxy-combustion (DGOC) power cycle is a novel, zero-emission power production scheme. This work presents the detailed parametric study of various process performance variables namely gasifier temperature, gasifier pressure, fraction of recycle gas from combustor, molar gasification agents ratio, different type of sorbents on the process performance measured in term of product gas quality and quantity, total heat generated for power production and sulfur removal efficiency using the ASPEN Plus simulator. Various sorbents namely CaCO3, Fe2O3, MnO, CuO are considered for this study. Results shows that different sorbents posses different behavior. Temperature has significant affect on the DGOC performance. Fe2O3 is not a suggested sorbent in DGOC. CuO appears to be good sorbent in terms of temperature in the gasifier required or energy input required to the gasifier, and sulfur removal efficiency. MnO appears to be good sorbent in terms of syngas quality and total heat generated which was used to produce power by DGOC cycle.