Design a fluidized bed gasifier. the product gas consist of h 12 m3/min, ch,4 m3/min, co-15 m'/min, co2 (stoichiometric basis) and unreacted air (stoichiometric basis). the gasifier considered as a cylindrical cross section reactor. the actual air-to-fuel ratio should be 30% of the stoichiometric requirements while 70% exit along with the product gas as unreacted. the ultimate analysis of biomass used for process is as follows: c 51.7%; h 7.2%; o-40.53%. the gasification rate is 3 gj/hr-m2, while, 1250 kg of biomass is used for every hour [density of air 1.2 kg/m: density of co, 1.98 kg/m: heating value of biomass 18 mj/kg] [mw: с 12. h 1,0-16, n-14, s-32] a. write empirical chemical formula of fuel. b. write balanced stoichiometric equation. c. calculate air-to-fuel ratio. d. calculate the superficial velocity. total gas production rate area energy rate velocity gasification rate area 319 pm eng9