Page 225 - Materials Chemistry, Second Edition

208 Practical Design Calculations for Groundwater and Soil Remediation

(b) The hydrogen content in the soil containing 1,500 mg/kg xylenes
(C H ) =
8
10
Mass of H in one mole of xylenes
1,500 ×
MW of xylenes
110×
= 1,500 × = 0.014%
(128 110)×+ ×

(c) The heating value (using Equation 5.47):

 Btu 
(
(
Heating value in  = 145.4 0.136)+ 620 0.014) = 28.5

 lb 
Example 5.31: Estimate the Combustion Temperature
A waste stream contains 20% by weight of carbon, 2% of oxygen, 1% of
hydrogen, and 0.1% of sulfur. Estimate the combustion temperature with no
auxiliary fuel and 85% excess air.

Solution:
(a) The heating value (using Equation 5.47):

 Btu   2 
(
Heating value in lb   = 145.4 20)+ 620 1−  + 41(0.1)



8 

= 3,377
(b) The combustion temperature (using Equation 5.48) =
3,377
T = 60 +
1 85% (7.5 10) 3,377 ] )
(0.325)[1 ( + ) × − 4 (
×
+
°
= 1,828 F

5.7.3 Regulatory Requirements for Incineration of Hazardous Waste

Emissions from hazardous waste combustors are regulated under two stat-
utory authorities: Resource Conservation and Recovery Act (RCRA) and
Clean Air Act (CAA). The maximum achievable control technology (MACT)