Roterende Deeltjes Scheider (RDS) voor reiniging van biomassa stookgassen
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An account is given of the patented technique of the rotational particle separator for separating solid and liquid particles of diameter 0.1 μm and larger from gases. Attention is focused on the working principle, fluid mechanical constraints, particle design, separation performance, power consumption, dimensions, filter cleaning and costs. Furthermore, an overview is given of current developments to introduce this technique in industrial dust removal, in electricity generation and in the consumer goods market. The article concludes with a summary of the feature which distinguish this technique from existing filtering methods.
To reduce sampling and sample separation time, a highly efficient method based on solid-phase adsorption (s.p.a.) on amino phase was designed. This method is suitable for intermittent trapping of tar compounds ranging from benzene to coronene prevailing in product gases from thermal decomposition of biomass at 700–1000°C. Using eluotropic elution, adsorbates are selectively desorbed into aromatic and phenolic fractions and then determined by gas chromatography with flame-ionization detection. The sampling step allows collection of one to three samples per minute, compared with one or two samples per hour using conventional cold trapping (c.t.) techniques, and correspondingly more information is obtained. As a result of this improvement, the progress of pyrolysis and gasification processes in terms of molecular distribution is easily followed. Furthermore, the method can be readily applied to establish cold-trap and filter performance and for industrial emission control. The usefulness of the method is compared with the cold-trapping techniques and the novel solid-phase micro extraction (s.p.m.e.) technique, not tested earlier for tar sampling.
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