Piecewise Planar Surface Models from Sampled Data

1991 ◽  
pp. 667-680 ◽  
Author(s):  
David A. Southard
Keyword(s):  
Sampled Data ◽  
Planar Surface ◽  
Surface Models

Elemental chlorine-free bleaching of North American hardwood kraft pulps: Evaluation of oxidant-reinforced extraction variables on overall bleaching optimization

TAPPI Journal ◽  
2013 ◽  
Vol 12 (10) ◽  
pp. 33-41 ◽  
Author(s):  
BRIAN N. BROGDON
Keyword(s):  
Response Surface ◽  
Chlorine Dioxide ◽  
North American ◽  
Yield Loss ◽  
Alkaline Extraction ◽  
Kraft Pulps ◽  
Pulp Bleaching ◽  
Response Surface Models ◽  
Elemental Chlorine ◽  
Surface Models

This investigation evaluates how higher reaction temperatures or oxidant reinforcement of caustic extraction affects chlorine dioxide consumption during elemental chlorine-free bleaching of North American hardwood pulps. Bleaching data from the published literature were used to develop statistical response surface models for chlorine dioxide delignification and brightening sequences for a variety of hardwood pulps. The effects of higher (EO) temperature and of peroxide reinforcement were estimated from observations reported in the literature. The addition of peroxide to an (EO) stage roughly displaces 0.6 to 1.2 kg chlorine dioxide per kilogram peroxide used in elemental chlorine-free (ECF) bleach sequences. Increasing the (EO) temperature by Δ20°C (e.g., 70°C to 90°C) lowers the overall chlorine dioxide demand by 0.4 to 1.5 kg. Unlike what is observed for ECF softwood bleaching, the presented findings suggest that hot oxidant-reinforced extraction stages result in somewhat higher bleaching costs when compared to milder alkaline extraction stages for hardwoods. The substitution of an (EOP) in place of (EO) resulted in small changes to the overall bleaching cost. The models employed in this study did not take into account pulp bleaching shrinkage (yield loss), to simplify the calculations.

QUANTIFYING THE EFFECTS OF FUEL COMPOSITIONS AND PROCESS VARIABLES ON PLANAR SURFACE AREA AND SPRAY NONUNIFORMITY VIA COMBINED MIXTURE-PROCESS DESIGN OF EXPERIMENT

2017 ◽  
Vol 27 (8) ◽  
pp. 707-722 ◽  
Author(s):  
Longfei Chen ◽  
Liuyang Feng ◽  
Zhixin Liu ◽  
Guangze Li ◽  
Yanfei Li ◽  
...  
Keyword(s):  
Surface Area ◽  
Design Of Experiment ◽  
Process Design ◽  
Process Variables ◽  
Planar Surface

Bank-to-Turn Utilizing Sampled Data Non-Linear Control

1986 ◽  
Author(s):  
D. Caughlin ◽  
T. Bullock
Keyword(s):  
Linear Control ◽  
Sampled Data ◽  
Non Linear
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