Abstract Tar formation is a significant issue during biomass gasification. Catalytic removal of tars with the use of nickel catalyst allows to obtain high conversion rate but coke formation on catalysts surface lead to its deactivation. Toluene decomposition as a tar imitator was studied in gliding discharge plasma-catalytic system with the use of 5%, 10% and 15% by weight Ni and NiO catalyst on Al2O3 (α-Al2O3) and Peshiney (γ-Al2O3) carrier in gas composition similar to the gas after biomass pyrolysis. The optimal concentration of nickel was identified to be 10% by weight on Al2O3. It was stable in all studied initial toluene concentrations, discharge power while C7H8 conversion rate remained high – up to 82%. During the process, nickel catalysts were deactivated by sooth formation on the surface. On catalysts surface, toluene decomposition products were identified including benzyl alcohol and 3-hexen-2-one.

中文翻译：

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用于焦油去除的耦合等离子体催化系统中的镍催化剂

摘要 焦油的形成是生物质气化过程中的一个重要问题。使用镍催化剂催化去除焦油可以获得高转化率，但在催化剂表面形成焦炭会导致其失活。在气体中的 Al2O3 (α-Al2O3) 和 Peshiney (γ-Al2O3) 载体上使用 5%、10% 和 15% 重量的 Ni 和 NiO 催化剂在滑动放电等离子体催化系统中研究了甲苯作为焦油模拟剂的分解成分类似于生物质热解后的气体。镍的最佳浓度被确定为在 Al2O3 上按重量计 10%。它在所有研究的初始甲苯浓度、放电功率中都很稳定，而 C7H8 转化率仍然很高——高达 82%。在此过程中，镍催化剂通过在表面上形成光滑而失活。在催化剂表面，