Matlab code used:

% Given:

% dX/dL = eta*RNH3*A/2*FN2

% Known parameters

eta = 11.7727

RNH3 = 56791.1128

FN2 = 135.43

X = 97

% Function used

func = @(A,L) eta*RNH3*A/2*FN2

A = 0

n = 1

L = func(A)

while abs(A-L)>0.0001

A = L

n = n+1

L = func(A)

end

I can't seem to iterate this code to determine the Area of the reactor (A) required at 97% conversion(X).