$20.$If for the above reaction, $1kW$ of power is used as parasitic or auxiliary power. Please calculate the $C{O}_2$ emission due to import of the power if the importedcpower emits $0\mathrm{.}2kg$ of $C\frac{O_2}{k}Wh.$

$21.$What is the scope $1$ and scope $2$ emission when $1kW$ is purchased from outside?

$22.$cSteam methane reformation is also utilized to manufacture Di$-$methyl ether

$(DME-C{H}_{3}OC{H}_3)$ using the following equation.

$C{H}_4+H_{2}OCO+3H_2$

$2CO+4H_{2}C{H}_3-O-C{H}_3+H_{2}O$

Calculate how much DME can be produced per kg of methane.

$23.C{O}_2$ conversion is attracting a lot of attention. One easiest way is to convert $C{O}_2$to methanol using the following reaction.

$C{O}_2+3H_{2}C{H}_{3}OH+H_2$

a$.$ Calculate how much hydrogen is needed to produce $1kg$ of methanol.

b$.$ Calculate how much hydrogen is needed to convert $1kg$ of $C{O}_2.$

c$.$ And in case of $\text{'}b\text{'},$ how much methanol is generated.

$24.C{O}_2$ is also converted to methane or syngas, using hydrogen.

Case $1$: Conversion to methane

$C{O}_2+4H_{2}C{H}_4+2H_{2}O$

a$.$ Calculate how much hydrogen is needed to produce $1kg$ of methane.

b$.$ Calculate how much hydrogen is needed to convert $1kg$ of $C{O}_2.$

c$.$ And in case of $\text{'}b\text{'},$ how much methane is generated.

Case $2$: Conversion to syngas $($reverse water gas shift reaction$)$

$C{O}_2+H_{2}OCO+H_2$

a$.$ Calculate how much water is needed to produce $1kg$ of syngas.

b$.$ Calculate how much water is needed to convert $1$ kg of CO$2.$

c$.$ And in case of $$b$,$ how much syngas is generated.