Data from a low-density polyethylene production process. There are 14 process variables and 5 quality variables (last 5 columns).
Data source
Simulated data.
Two tubular reactors are connected in series. More details about the dataset can be found in this journal publication.
The first 50 observations are from common-cause (normal) operation, while the last 4 show a process fault developing: the impurity level in the ethylene feed in both zones is increasing.
Tin: inlet temperature to zone 1 of the reactor [K]
Tmax1: maximum temperature along zone 1 [K]
Tout1: outlet temperature from zone 1 [K]
Tmax2: maximum temperature along zone 2 [K]
Tout2: outlet temperature from zone 2 [K]
Tcin1: temperature of inlet coolant to zone [K]
Tcin2: temperature of inlet coolant to zone 2 [K]
z1: percentage along zone 1 where Tmax1 occurs [%]
z2: percentage along zone 2 where Tmax2 occurs [%]
Fi1: flow rate of initiators to zone 1 [g/s]
Fi2: flow rate of initiators to zone 2 [g/s]
Fs1: flow rate of solvent to zone 1 [% of ethylene]
Fs2: flow rate of solvent to zone 2 [% of ethylene]
Press: pressure in the reactor [atm]
Conv: quality variable: cumulative conversion
Mn: quality variable: number average molecular weight
Mw: quality variable: weight average molecular weight
LCB: quality variable: long chain branching per 1000 C atoms
SCB: quality variable: short chain branching per 1000 C atoms