Agilent 990 Micro GC User Manual 135
10 Micro GC Biogas Analyzers
Checkout Information 136
Certificate of the Universal Gas Calibration Standard 140
The Biogas Analyzer Method 141
Biogas is a type of biofuel produced by the biological breakdown of organic material in an
anaerobic environment. The anaerobic digestion or fermentation process of biodegradable
materials such as manure, sewage, municipal waste, green waste, plant material, or crops
produces biogas. Biogas is composed of methane, carbon monoxide, hydrogen, carbon dioxide,
nitrogen, hydrogen sulfide, and oxygen. When methane, hydrogen, and carbon monoxide are
combusted or oxidized with oxygen, energy is produced that can be used as fuel.
The Agilent 990 Micro GC Biogas Analyzer is a factory-tuned analyzer specific for biogas analysis.
Two types of Biogas Analyzers are available: Agilent 990 Micro GC Biogas Analyzer and the
Agilent 990 Micro GC Biogas Analyzer Extended. The choice of configuration depends on the type
of biogas sample.
Biogas Analyzer
The Agilent 990 Micro GC Biogas Analyzer is used to analyze pure biogas including analysis of
permanent gases, hydrogen sulfide and hydrocarbons up to n-propane. This is a basic cabinet
equipped with a CP-Molsieve 5A channel and a CP-PoraPLOT U channel with dual carrier gas
option.
Biogas Analyzer Extended
The Agilent 990 Micro GC Biogas, Analyzer Extended, is used to analyze biogas mixed with other
hydrocarbon streams. The analysis consists of permanent gases, hydrogen sulfide and
hydrocarbons up to n-heptane. The Biogas Analyzer Extended is a basic cabinet and a channel
extension cabinet equipped with three channels: a CP-Molsieve 5A, a CP-PoraPLOT U channel and
a CP-Sil 5 CB channel with dual carrier gas option.
Before starting up the Analyzer make sure that correct carrier gases are connected for all
channels. Argon carrier gas is required for the CP-Molsieve channel and Helium for all other
channels. The required pressure for all carrier gases is 550 kPa ±10 kPa (80 psi ±1.5 psi).
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