Maximum air required per kg of fuel for complete combustion can be given by (considering mass fraction being C, H, O, and S of respective constituent)
1
\({1\over 21}{[{8\over 3}C+8({H}-{O\over 8})+S]}\;\)
2
\({1\over 23}{[{8\over 3}C+8({H}-{O\over 8})+S]}\;\)
3
\({1\over 23}{[8C+8({H}-{O\over 8})+S]}\;\)
4
None of the above