One of the major obstacles for the application of biomass gasification systems is the relatively high tar content of the producer gas that can inhibit its use in engines or turbines or in further processes like methanation or conversion to other secondary fuels or chemicals. Moreover, tars are difficult to define and also because of the different attempts to do so remains the determination of its content challenging. Nowadays conventional wet chemical and other standard methods for the determination of tars are very time consuming and do not allow continuous online monitoring of the gas quality. Furthermore, the execution by different users can affect the results. One approach to avoid these disadvantages is an automatic system that monitors the tar concentration in the producer gas online during the gasification process.

Such an automatic system was developed at IFK in the past with the goal of commercialization and moreover better comparability of the results from tar measuring. To show its accuracy and advantages over standard methods, comparative measurements with the standard method DIN CEN/TS 15439 at an electrically heated lab scale gasifier at different settings have been performed at IFK over several hours. Then, the results of both measurement techniques were compared to each other. The results show a stable operation of the gasifier and therefore also the tar production and its fast detection with the online system. Furthermore, the comparison of the results from both measurement techniques shows good agreement. A satisfying validation of the online method could be conducted.

生物质气化系统应用的主要障碍之一是生产气的焦油含量较高，这会抑制其在发动机或涡轮机或其他过程（如甲烷化或转化为其他二次燃料或化学药品）中的使用。而且，焦油很难定义，并且由于这样做的尝试不同，仍然难以确定焦油的含量。如今，用于确定焦油的常规湿法化学方法和其他标准方法非常耗时，并且无法对气体质量进行连续的在线监控。此外，不同用户的执行可能会影响结果。避免这些缺点的一种方法是在气化过程中在线监控生产气中焦油浓度的自动系统。

IFK过去曾开发过这种自动系统，其目标是商业化，而且焦油测量结果的可比性更好。为了显示其与标准方法相比的准确性和优势，已在IFK上进行了数小时的在不同设置下的电加热实验室规模气化炉上使用标准方法DIN CEN / TS 15439进行的对比测量。然后，将两种测量技术的结果相互比较。结果表明气化炉运行稳定，因此焦油生产及其在线系统的快速检测也是如此。此外，两种测量技术的结果比较显示出很好的一致性。可以对在线方法进行令人满意的验证。