Table 4
Technological parameters of alkylation system performance.
| Parameter | Mode |
||||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| Butane–butylene fraction composition | |||||||
| Density of 20 °C, g/sm3 | 0.58 | 0.58 | 0.58 | 0.58 | 0.58 | 0.58 | 0.58 |
| Methane, wt.% | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Ethane, wt.% | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Ethylene, wt.% | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| C2, wt.% | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Propane, wt.% | 0.65 | 0.56 | 0.79 | 0.60 | 0.39 | 0.80 | 0.30 |
| Propylene, wt.% | 0.06 | 0.07 | 0.08 | 0.23 | 0.04 | 0.10 | 0.03 |
| Propane + propylene, wt.% | 0.71 | 0.63 | 0.87 | 0.83 | 0.43 | 0.90 | 0.33 |
| Isobutane, wt.% | 40.11 | 39.74 | 41.21 | 38.68 | 42.50 | 44.87 | 43.67 |
| n-Butane, wt.% | 8.44 | 8.41 | 8.60 | 7.53 | 7.97 | 8.07 | 8.41 |
| Butylene, wt.% | 16.17 | 15.49 | 15.87 | 15.01 | 16.28 | 16.76 | 15.79 |
| i-Butylene, wt.% | 7.71 | 8.08 | 6.51 | 11.58 | 6.04 | 2.34 | 5.71 |
| Trans-butylene, wt.% | 16.43 | 16.74 | 16.33 | 14.97 | 16.46 | 16.69 | 15.96 |
| Cis-butylene, wt.% | 9.87 | 10.58 | 10.04 | 8.74 | 9.88 | 9.92 | 9.80 |
| Butadiene-1,3, wt.% | 0.37 | 0.33 | 0.37 | 0.29 | 0.33 | 0.33 | 0.30 |
| ∑butylenes, wt.% | 50.18 | 50.89 | 48.75 | 50.30 | 48.66 | 45.71 | 47.26 |
| Isopentane, wt.% | 0.00 | 0.00 | 0.01 | 1.15 | 0.00 | 0.00 | 0.00 |
| n-Pentane, wt.% | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| ∑C6+, wt.% | 0.19 | 0.00 | 0.19 | 1.22 | 0.10 | 0.12 | 0.03 |
| ∑C5+, wt.% | 0.19 | 0.00 | 0.20 | 2.37 | 0.10 | 0.12 | 0.03 |
| H2S + RSH, wt.% | 0.0007 | 0.0005 | 0.0003 | 0.0002 | 0.0003 | 0.0002 | 0.0002 |
| Technological parameters | |||||||
| Alkenes flowrate, m3/h | 34.98 | 36.20 | 39.62 | 33.18 | 40.76 | 24.45 | 42.43 |
| Circulating isobutane flowrate, m3/h | 125.62 | 120.00 | 116.96 | 115.45 | 112.55 | 108.03 | 119.09 |
| Coolant flowrate to contactor 1, m3/h | 31.97 | 30.97 | 32.48 | 31.97 | 36.99 | 31.95 | 24.99 |
| Coolant flowrate to contactor 2, m3/h | 37.03 | 32.01 | 32.50 | 34.98 | 30.96 | 24.21 | 40.49 |
| Coolant flowrate to contactor 3, m3/h | 31.75 | 35.26 | 38.31 | 27.82 | 38.96 | 17.90 | 40.47 |
| Coolant flowrate to contactor 4, m3/h | 31.76 | 35.27 | 38.33 | 27.84 | 38.97 | 17.88 | 37.05 |
| Inlet temperature in contactor 1, °C | −2.80 | 3.80 | 4.49 | −7.32 | −2.34 | −3.58 | 1.41 |
| Inlet temperature in contactor 2, °C | 5.62 | 5.81 | 6.40 | 4.70 | 4.34 | 2.90 | 1.90 |
| Inlet temperature in contactor 3, °C | 6.27 | 5.22 | 5.64 | 4.98 | 3.86 | 2.54 | −2.49 |
| Inlet temperature in contactor 4, °C | 5.34 | 4.65 | 6.17 | 4.46 | 5.03 | 3.26 | −0.91 |
| Fresh acid flowrate to circuit 1, m3/h | 3.83 | 3.50 | 4.75 | 3.02 | 5.17 | 3.50 | 5.33 |
| Fresh acid flowrate to circuit 2, m3/h | 2.50 | 2.21 | 2.94 | 2.03 | 3.30 | 2.20 | 3.49 |