Osipovs Sergejs
Department of Chemistry, Daugavpils University, Vienibas 13, 5401, Daugavpils, Latvia.
Anal Bioanal Chem. 2008 Jun;391(4):1409-17. doi: 10.1007/s00216-007-1809-7. Epub 2007 Dec 27.
Biomass tar mainly consists of stable aromatic compounds such as benzene and polyaromatic hydrocarbons, benzene being the biggest tar component in real biomass gasification gas. For the analysis of individual tar compounds, the solid-phase adsorption method was chosen. According to this method, tar samples are collected on a column with an amino-phase sorbent. With a high benzene concentration in biomass tar, some of the benzene will not be collected on the amino-phase sorbent. To get over this situation, we have installed another column with activated charcoal which is intended for collection of volatile organic compounds, including benzene, after the column with the amino-phase sorbent. The study of maximal adsorption amounts of various compounds on both adsorbents while testing different sampling volumes led to the conclusion that benzene is a limiting compound. The research proved that the use of two sorbents (500 mg + 100 mg) connected in series allows for assessment of tar in synthesis gas with a tar concentration up to 30-40 g m(-3), which corresponds to the requirements of most gasifiers.
生物质焦油主要由稳定的芳香族化合物组成，如苯和多环芳烃，苯是实际生物质气化气中最大的焦油成分。对于单个焦油化合物的分析，选择了固相吸附法。根据该方法，焦油样品收集在装有氨基相吸附剂的柱上。由于生物质焦油中苯的浓度较高，部分苯不会被氨基相吸附剂收集。为克服这种情况，我们在装有氨基相吸附剂的柱之后安装了另一根装有活性炭的柱，用于收集包括苯在内的挥发性有机化合物。在测试不同采样体积时，对两种吸附剂上各种化合物的最大吸附量进行研究得出结论：苯是一种受限化合物。研究证明，串联使用两种吸附剂（500毫克 + 100毫克）能够评估合成气中焦油浓度高达30 - 40克/立方米的焦油，这符合大多数气化炉的要求。
