Process flow diagram, PFD is given in Figure $2\mathrm{.}1$ displays other alternative for DME

production. The process starts with feed preparation with preheater and heat exchanger for the

reactor and two separation towers. Production method is catalytic dehydration of methanol over

an acid zeolite catalyst. A packed bed reactor $($R$-101)$ which is filled with solid catalyst

particles is used to produce DME. The process uses one heat exchanger network $($E$-102)$ and

$3$ auxiliary heat exchangers $($E$-101,$ E$-103$ and E$109).$

Figure $2\mathrm{.}1$: Process flow diagram of Dimethyl Ether production.

Table $2\mathrm{.}1$: Stream summary for streams of heat exchangers.

$($a$)$ Determine all the specific heat capacity value $(k\frac{J}{K}g.C)$ for all hot and cold streams.

$($b$)$ Verify if the above network $($Figure $2\mathrm{.}1)$ has minimum utility requirement th $T_{\text{m}\text{i}\text{n}}=20$

C$?$

$($c$)$ If not, explain and provide a solution to achieve minimum utility requiremes