5 ways to get propane?

1) Propane is derived from propene, while nickel is used as a catalyst: C3H6 + H2 = C3H8;
2) It is also possible to contain propane from foul gas: 3CO + 7H2 = C3H8 + 3H2O;
3) Propane is supported by the hydrogenation of coal: 3C + 4H2 = C3H8;
4) Another method for producing propane from chloroethane, for this, the ethane chain is extended with one carbon atom, in the presence of chloroethane, the Würz reaction is used: CH3-CH2Cl + CH3Cl + 2 Na = 2NaCl + CH3-CH2-CH3 (propane);
5) Propane is also obtained from methane, but the reaction must be carried out in several stages: CH4 + Cl2 = CH3Cl + HCl
2CH3Cl +2 Na = CH3-CH3 + 2NaCl
CH3-CH3 + Cl2 = CH3-CH2Cl + HCl
CH3Cl + CH3-CH2Cl + 2Na = CH3-CH2-CH3 (propane) + 2NaCl