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Your search keyword '"Van Heiningen, Adriaan R. P."' showing total 22 results
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22 results on '"Van Heiningen, Adriaan R. P."'

15. Liquid hydrocarbon fuels from cellulosic feedstocks via thermal deoxygenation of levulinic acid and formic acid salt mixtures.

Author

Case, Paige A., van Heiningen, Adriaan R. P., and Wheeler, M. Clayton

Subjects
*LIQUID fuels, *HYDROCARBONS, *FEEDSTOCK, *DEOXYGENATION, *FORMIC acid, *MIXTURES, *SALT, *STOICHIOMETRY
Abstract

Formic acid is demonstrated as a hydrogen source in a solid reaction system by first stabilizing the acid as a calcium salt which then decomposes at temperatures of relevance in pyrolytic reactions. High yields of deoxygenated hydrocarbons are produced by thermal decomposition of formic and levulinic acid mixtures where the optimum feed stoichiometry is consistent with that of cellulose hydrolysis and dehydration. The method promises a high-yield, robust, low-pressure, non-catalytic route for converting biomass hydrolyzates to hydrocarbon mixtures which are similar to petroleum crude oils. [ABSTRACT FROM AUTHOR]

Published
2012
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20. A Mathematic Model for Direct Causticization of Na2CO3with TiO2in a Semi‐batch Reactor

Author

Zeng, Le and Van Heiningen, Adriaan R. P.

Abstract

A mathematic model was developed for direct causticization of sodium carbonate with titanium dioxide in a semi‐batch reactor. The model predictions of the titanate yield and pentatitanate yield showed a reasonable agreement with the experimental data from a pilot‐scale fluidized bed operating in semi‐batch mode. The rate constant of the present model was generally consistent with those obtained from the small‐scale batch experiments in the literature. A new rate constant considering carbonate conversion to pentatitanate was introduced. All the results provided support that the solid‐state direct causticization of sodium carbonate with titanium dioxide in a semi‐batch fluidized bed follows the shrinking‐core diffusion model.

Published
2002
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