Abstract
This study presents a semi-conductor metal oxide gas sensor system for the online flue gas monitoring during oak wood drying. Oak wood flakes and solid oak wood were heated on laboratory scale. The emissions were analyzed by gas chromatography–mass spectrometry and monitored by a semi-conductor metal oxide gas sensor setup. The calibrated sensor system was able to detect different drying and degradation stages of the oak wood flakes by online monitoring acetic acid and furans/methoxyphenols at 25–240 °C. The system also allowed a monitoring of acetic acid emission from solid wood at 75 °C. This sensor application has the potential to online monitor the flue gas of oak lumber drying and optimize the drying process.
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