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LDPE

Description: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
Data shape:54 rows and 19 columns
Usage restrictions:None
Contact person:Kevin Dunn
Contact details:datasets@connectmv.com
Added here on:12 January 2011 13:27
Last updated:31 May 2011 13:16

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Tags for this dataset

multivariate outliers monitoring
(c) Kevin Dunn, learnche.org