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Capstone

Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Phone: (818) 734-5300 • Fax: (818) 734-5320 • Web: www.microturbine.com

Technical Reference

Capstone MicroTurbineTM Systems Emissions

Summary

Capstone MicroTurbineTM systems are inherently clean and can meet some of the strictest emissions standards in the world. This technical reference is to provide customers with information that may be requested by local air permitting organizations or to compare air quality impacts of different technologies for a specific project. The preferred units of measure are “output based”; meaning that the quantity of a particular exhaust emission is reported relative to the useable output of the microturbine – typically in pounds per megawatt hour for electrical generating equipment. This technical reference also provides volumetric measurements in parts per million and milligrams per normal cubic meter. A conversion between several common units is also provided.

Maximum Exhaust Emissions at ISO Conditions

Table 1 below summarizes the exhaust emissions at full power and ISO conditions for different Capstone microturbine models. Note that the fuel can have a significant impact on certain emissions. For example landfill and digester gas can be made up of a wide variety of fuel elements and impurities, and typically contains some percentage of carbon dioxide (CO2). This CO2 dilutes the fuel, makes complete combustion more difficult, and results in higher carbon monoxide emissions (CO) than for pipeline-quality natural gas.

Table 1. Emission for Different Capstone Microturbine Models in [lb/MWhe]

Model

Fuel

NOx

CO

VOC (5)

C30 NG

Natural Gas (1)

0.64

1.8

0.23

CR30 MBTU

Landfill Gas (2)

0.64

22.0

1.00

CR30 MBTU

Digester Gas (3)

0.64

11.0

1.00

C30 Liquid

Diesel #2 (4)

2.60

0.41

0.23

C65 NG Standard

Natural Gas (1)

0.46

1.25

0.10

C65 NG Low NOx

Natural Gas (1)

0.17

1.30

0.10

C65 NG CARB

Natural Gas (1)

0.17

0.24

0.05

CR65 Landfill

Landfill Gas (2)

0.46

4.0

0.10

CR65 Digester

Digester Gas (3)

0.46

4.0

0.10

C200 NG

Natural Gas (1)

0.40

1.10

0.10

C200 NG CARB

Natural Gas (1)

0.14

0.20

0.04

CR200 Digester

Digester Gas (3)

0.40

3.6

0.10

Notes:

(1) Emissions for standard natural gas at 1,000 BTU/scf (HHV) or 39.4 MJ/m3 (HHV)

(2) Emissions for surrogate gas containing 42% natural gas, 39% CO2, and 19% Nitrogen (3) Emissions for surrogate gas containing 63% natural gas and 37% CO2

(4) Emissions for Diesel #2 according to ASTM D975-07b

(5) Expressed as Methane

410065 Rev. B (April 2008)

Page 1 of 6

Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.

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