| Abstrakt: |
Gasification is considered to be one of the most promising uses for biomass. The biosyngas is unique such that it can be catalytically converted into Fischer–Tropsch (FT) oils or other chemical products. However, in thermo-chemical biomass conversion processes, especially gasification, the tar content and its composition is a major subject. Nitrogen-containing tar compounds can strongly affect the performance of cobalt and iron catalysts and may cause irreversible deactivation of FT catalysts. Therefore, the analysis of nitrogen-containing tar compounds in biosyngas plays an important role. Adsorption efficiency of pyridine, pyrrole, aniline, benzonitrile, quinoline, and indole on the amino phase adsorbent (APA) and on the activated coconut charcoal (ACC) were analyzed. Aniline, benzonitrile, quinoline, and indole get almost completely adsorbed on APA with any amount of tested compounds, with any volume of air drawn through and different air temperatures. Pyridine and pyrrole are also almost completely adsorbed on APA with any temperature of the tube and with any volume of air drawn through, but only with the small mass of injected compound. The total sum of the pyridine and pyrrole adsorbed on both sorbents, when a comparably dominant mass of compounds is injected, allows for the assessment of the entire amount of these compounds in synthesis gas. The research has proven that use of a standard sampling device (500 mg of APA + 100 mg of ACC) allows for assessing nitrogen-containing tar compounds in synthesis gas. [ABSTRACT FROM AUTHOR] |
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