# stackloss {datasets}

### Description

Operational data of a plant for the oxidation of ammonia to nitric acid.

### Usage

stackloss stack.x stack.loss

### Details

“Obtained from 21 days of operation of a plant for the oxidation of ammonia (NH3) to nitric acid (HNO3). The nitric oxides produced are absorbed in a countercurrent absorption tower”. (Brownlee, cited by Dodge, slightly reformatted by MM.)

`Air Flow`

represents the rate of operation of the plant. `Water Temp`

is the temperature of cooling water circulated through coils in the absorption tower. `Acid Conc.`

is the concentration of the acid circulating, minus 50, times 10: that is, 89 corresponds to 58.9 per cent acid. `stack.loss`

(the dependent variable) is 10 times the percentage of the ingoing ammonia to the plant that escapes from the absorption column unabsorbed; that is, an (inverse) measure of the over-all efficiency of the plant.

### References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) *The New S Language*. Wadsworth & Brooks/Cole.

Dodge, Y. (1996) The guinea pig of multiple regression. In: *Robust Statistics, Data Analysis, and Computer Intensive Methods; In Honor of Peter Huber's 60th Birthday*, 1996, *Lecture Notes in Statistics* **109**, Springer-Verlag, New York.

Documentation reproduced from R 3.0.2. License: GPL-2.