Table 6: Cost-benefit comparison for LH recovery, NI Plan A and NI Plan B process.

 Process Name Costs of process consumption
 /(106 RMB×a-1)
 Products sales/(106 RMB×a-1) After-tax products sales
 /(106 RMB×a-1)
After-tax net profit
 /(106RMB×a-1)
 Fuel cost  Electric energy cost  NG product  LPG product
 LH recovery  10.268  34.334  2727.65  182.980  2823.31  2080.95
 NI(plan A)  3.943  13.542  3048.192  /  2956.75  2202.41
 NI(plan B)  2.048  7.034  3048.192  /  2956.75  2209.30