| |
Propylene carbonate (PC) |
Polypropylene carbonate (PPC) |
| Material intensity |
|
|
| Net stream of propylene oxide (PO), lb/hr |
13184.2 |
19166.4 |
| Mass of product, lb/hr |
23143.3 |
30224.2 |
| Net PO/Unit mass of product |
0.569 |
0.634 |
| Net PO/Unit mass of (PPC+PC) |
|
0.599 |
| Energy intensity |
|
|
| Total heating duty, Btu/hr |
+2.678×106 |
+2.927´107 |
| Total cooling duty, Btu/hr |
+1.582×107 |
+4.202´107 |
| Net duty (heating- cooling), Btu/hr |
-1.314×107 |
-1.257´107 |
| Net duty/Unit mass of product, Btu/lb |
- 567 |
-410 |
| Net duty/Unit mass of (PPC+PC), Btu/lb |
|
-390 |
| Total heating cost, $/hr |
40.9 |
231.7 |
| Total cooling cost, $/hr |
3.5 |
9.4 |
| Net cost (heating + cooling), $/hr |
44.5 |
241.1 |
| Net cost/Unit mass of product, $/lb |
1.920´10-3 |
7.978´10-3 |
| Net cost/Unit mass of (PPC+PC), $/lb |
|
7.542´10-3 |
| Environmental impact |
|
|
| Feed stream CO2, lb/hr |
-9976.8 |
-14523.2 |
| Utility CO2e, lb/hr |
+2587.8 |
+4172.6 |
| Net stream CO2, lb/hr |
-7389.0 |
-10350.6 |
| Net stream CO2/Unit mass of product |
-0.318 |
-0.342 |
| Net stream CO2/Unit mass of PPC+PC |
|
-0.323 |
