AQESHOW - Abstract

Air Quality Conference Agenda
Emissions Conference Agenda

Abstract Title: An Overview of a relatively simple method to determine the Biogenic versus Fossil Fuel Component of a Source Emission: BS ISO 13833
Abstract Type: Oral
Session Choice: Emission Monitoring
Presenter Name: Roger Brown
Company/Organisation: Oakwood Environmental
Country: United Kingdom

Abstract Information :

Increasingly the amount of biogenic versus fossil fuel is becoming important from a fiscal viewpoint. An overview of an eminently elegant and relatively simple method to determine the proportion of material arising from biogenic sources will be reviewed by determining the ratio of 14C to 12C in CO2. This is determined by obtaining a sample over a number of days and the resulting ratio of average 14CO2 to 12CO2 determined using AMS (Accelerator Mass Spectrometry). The talk will briefly cover:

  • representative sampling of CO2;
  • measurement of the sampled 14C;
  • calculation of the biogenic CO2 fraction in the stack gas emitted during the sampling period.
Procedures for collection of whole gas samples and absorption of CO2 in liquid and solid alkaline media are given. The biogenic fraction is determined using the measured 14C value. From the calculated biogenic CO2 fraction, the emitted amount of biogenic and fossil CO2 can be calculated. The author was a member of the ISO Committee which produced BS ISO 13833:2013 which describes the above method.

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