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Catalytic Oxidation 389

Example 4

Outline the step-by-step procedure for the determination of catalytic incineration design
variables, destruction efficiency, and related operational parameters for a permit review.
Solution
1. Based on the required DE, specify the appropriate ranges for T and T and select the
ci co
value for SV from Table 4.
T (minimum) = 600ºF
ci
T (minimum) = 1000ºF
co
T (maximum) = 1200ºF
co
SV = h −1
2. In a permit review, determine if the reported value for T , T , and SV are appropriate
ci co
to achieve the required DE. Compare the applicant’s values with the values in Table
4 and check if the following hold:
T (applicant) ≥ 600ºF
ci
1200ºF ≥ T (applicant) ≥ 1000ºF
co
SV (applicant) ≤ SV (Table 4)
If the reported values are appropriate, proceed with the calculations. Otherwise, the appli-
cant’s design is considered unacceptable. The reviewer may then wish to use the values in
Table 4.

Example 5

A catalytic incinerator (oxidizer) is to be used for treating a HAP emission stream docu-
mented in Table 1. Determine the following:
1. Destruction efficiency, DE
2. Temperature at the catalyst bed inlet, T
ci
3. Temperature at the catalyst bed outlet, T
co
4. Space velocity SV (assuming a precious metal catalyst is to be used)
Solution
The required destruction efficiency is 95%; therefore, the following hold:
T (minimum) = 600ºF
ci
T (minimum) = 1000ºF
co
T (maximum) = 1200ºF
co
SV = 30000 h −1 (assume precious metal catalyst)
Example 6

Outline the step-by-step procedure recommended by the US EPA for the determination of
the supplementary fuel requirements of a catalytic incinerator (oxidizer) treating dilute
emission streams that require no additional combustion air.
Solution
1. Use the following equation to determine if T = 600ºF from Table 4 is sufficient to
ci
ensure an adequate overall reaction rate without damaging the catalyst (i.e., check if
T falls in the interval 1000–1200ºF):
co