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Full-Text Articles in Engineering

Simulations Of Non-Stationary Reactors For The Catalytic Conversion Of Methane To Synthesis Gas, Krzysztof Gosiewski Jan 2001

Simulations Of Non-Stationary Reactors For The Catalytic Conversion Of Methane To Synthesis Gas, Krzysztof Gosiewski

Krzysztof Gosiewski

Mathematical simulation results are compared for several types of reactors for the conversion of methane to synthesis gas via catalytic partial oxidation of methane coupled with the simultaneous steam reforming. The simulations concerned reactors operating under non-stationary conditions, i.e. at a continuous, forced unsteady state. Both reverse-flowreactors with pelletized and monolith catalyst were simulated, and those with the pelletized catalyst, operating under conditions of feed composition cycling. The simulation results were compared with data for similar reactors operating at steady state. The basic process parameters compared include the conversion of methane and oxygen and the selectivities of the products (CO …


Characterisation Of Non-Condensable Sulphur Containing Gases From Kraft Pulp Mills (2), João F. Gomes Jan 2001

Characterisation Of Non-Condensable Sulphur Containing Gases From Kraft Pulp Mills (2), João F. Gomes

João F Gomes

This paper describes work performed on the sampling and analysis of non-condensable gases (NCG) emitted from diffuse sources of a Portuguese Kraft pulp mill, which is the background information for a NCG collection, treatment and disposal system. The variability found in the composition of the gaseous compounds showed the existence of gaseous streams other than typical total reduced sulphur (TRS) compounds as usually described. From the measured TRS concentrations and the gas flow rate from each source it was possible to calculate the emission flow rate, E, of each source. These emission flow rates were then divided into 3 categories …