A novel hybrid process for production of cyclohexanone oxime and high temperature hydrogen production using solar energy

Abstract

In the presented study, an integrated novel process for cyclohexanone oxime and power production by utilizing solar dish collectors and high temperature hydrogen production systems (water decay) is studied. This process is comprised from solar dish collectors, Cu-Cl thermochemical cycle, direct H2O2 production cycle, cyclohexanone oxime and organic Rankine cycle. In the thermochemical process, 2208 kg/h of oxygen and 278.5 kg/h of hydrogen are generated that 139.4 kg/h of hydrogen is the net generated hydrogen. Moreover, this system generates 9429.8 kW of power that 2419 kW of power is employed in Cu-Cl cycle, 808.8 kW is consumed in hydrogen peroxide production cycle and the rest, which is 6202 kW is the net produced power. This process for 6305.9 kg/h cyclohexanone produces 8504.3 kg/h cyclohexanone oxime. The cyclohexanone ammoximation also generates 1238 kW heat. Furthermore, a sensitivity analysis is performed to investigate the effect of some performance parameters on various design indicators. It can be comprehended that the increment of operating wall temperature leads to decrement of solar collector energy efficiency. On the other hand, increment of geometric concentration ratio results in higher collector thermal efficiency. By using more solar dishes, the generated cyclohexanone oxime, hydrogen and hydrogen peroxide molar flow rates rises 40.5%. 43.5% and 37.8%, respectively. Moreover, the organic Rankine cycle and total system’s efficiency increases 38.1% and 43.3%, respectively by increase in number of solar dishes.