International Scholarly Research Notices

Research Article

Gasification Coupled Chemical Looping Combustion of Coal: A Thermodynamic Process Design Study

Comparison of net energy obtainable from direct combustion and gasification coupled CLC of coal.


Case	C3	C1	C5	B5	B3	B2	C2	B1	C4	B4

HCCT (°C)	650	500	700	750	700	650	600	600	650	700
Air required (moles)	3.76	3.76	3.76	3.76	3.76	3.76	3.76	3.76	3.76	3.76
Preheating of coal (kJ)	10.06	7.09	11.11	12.19	11.11	10.06	9.04	9.04	10.06	11.11
Energy to heat air (kJ)	90.20	67.69	97.80	105.45	97.80	90.20	82.65	82.65	90.25	97.80
Reaction enthalpy from direct combustion (kJ)	−394.44	−394.11	−394.54	−394.65	−394.54	−394.44	−394.33	−394.33	−394.44	−394.54
Energy to cool N₂(kJ)	−69.95	−52.60	−75.81	−81.71	−75.81	−69.95	−64.13	−64.13	−69.95	−75.81
Energy to cool CO₂(kJ)	−29.56	−21.78	−32.22	−34.91	−32.22	−29.56	−26.93	−26.93	−29.56	−32.22
Net energy from direct combustion (kJ)	−393.68	−393.71	−393.66	−393.63	−393.66	−393.68	−393.69	−393.69	−393.68	−393.66
Net energy from gasification coupled CLC process (kJ)	−390.16	−389.07	−388.46	−388.43	−388.35	−388.34	−388.24	−388.17	−388.16	−388.02

Energy Difference(kJ)	3.52	4.64	5.20	5.20	5.31	5.34	5.46	5.53	5.52	5.64