$\begin{array}{1 1} oxidation\;of\;CH_4\;by \;steam\;at \;900^{\circ} \\ \text{reduction of HCHO using } LiAlH_4 \\ \text{reaction HCHO with a solution of NaOH} \\ \text{reduction of CO using} H_2 \;and\; Zn_0-cr_2O_3 \end{array} $
