A catalyst tower 40 R high and 18 n in diameter is packed willl I-in-dinmctcr spheres. Oas
enters the top of the bcd nt n tcmpcmture of 450 oF nnd leaves nt thc saine tcmlnmature The
pressure at the bouom of the catalyst bcu is 30301b//fn'abs. The bcd porosity is 0.40. ir the gas has
a average prospcrities similar to propane and thc time ofcontact wased on now in Urc void space)
between the gas and thc catalyst is 8 s, wiat is the inlet pressure?