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The sections in this article are Introduction Theoretical Foundations of Gas Potentiometry Physico‐Chemical Measuring Principle Solid Electrolytes Resumé GOP Applications in Research and Industry Materials, Design, and Systems Sensor Materials GOP Designs Electrical Metrology Response Time Analysis and Characterization of Gaseous and Liquid Fuel Combustion In Situ Measurement On‐Line Measurement (Off‐Flame Gas Potentiometric Measurement) Analysis and Characterization of Solid Fuel Conversion Gas Potentiometric Measurements in Combustion and Gasification Chambers Burn‐Out Characteristics of Solid Fuels, Biofuels, and Waste Materials under Combustion and Gasification Conditions Gas Potentiometric Combustion and Gasification Analysis: Burn‐Out Characteristics and Fuel‐Specific Makrokinetic Parameters Modeling to Determine Fuel‐Specific Makrokinetic Parameters Resumé Applications with Potential for Development The Performance of a Velocity‐Oxygen Probe Measurement of Fluid Dynamics in a Fluidized‐Bed Reactor Feed Control in Solid Fuel Gasification O 2 Concentration Distribution in a Fluidized‐Bed Membrane Reactor Outlook Conclusions

This paper describes a novel analytical method that applies a gaspotentiometric oxygen probe (GOP) for characterizing gasification behavior of solid fuels. On the basis of GOP signals a developed gasification model enables the determination of fuel-specific properties, like effective reaction rate constant and overall activation energy. For its experimental validation two coal cokes were converted with four different gasification agents in a lab-scale fluidized-bed reactor. The results obtained will be discussed and compared with literature data. As this advantageous in situ measurement technique is fast, inexpensive, and easy to handle, it makes the GOP a predestined tool for monitoring and controlling gasification processes.

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