Approach to Steady State in Completely Mixed Flow Reactors
| Autor: | James N. Jensen |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Environmental Engineering
Steady state Order of reaction Chemistry Hydraulics Environmental engineering Continuous stirred-tank reactor Mechanics Residence time (fluid dynamics) Kinetic energy Control volume law.invention Mixed flow law Environmental Chemistry General Environmental Science Civil and Structural Engineering |
| Zdroj: | Journal of Environmental Engineering. 127:13-18 |
| ISSN: | 1943-7870 0733-9372 |
| Popis: | Environmental engineers frequently employ the assumption that steady-state conditions are approximated after three hydraulic residence times. In this paper, the conditions under which this assumption is valid are elucidated. For well-mixed systems, the time to approach steady state depends on the kinetic order of removal mechanisms, the initial pollutant concentration in the control volume (=C0), and the kinetic rate constant. The assumption of three hydraulic residence times to steady state was found to be conservative if C0 = 0. However, if C0 equals the influent concentration, then more than three hydraulic residence times may be required to approach steady-state conditions with some zero-order reactions. |
| Databáze: | OpenAIRE |
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