Effect of zinc-containing nanopowders on the catalytic intermediate pyrolysis of buckwheat straw by using TGA-FTIR method
2020
Lazdovica, Kristine | Kampars, Valdis | Grabis, Jānis
Pyrolysis of buckwheat straw with or without catalysts was investigated using the TGA-FTIR method to determine the influence of zinc-containing nanopowders (ZnO, 1.5 % Er₂O₃/ZnO, 2 % Ag/ZnO, ZnWO₄, ZnAl₂O₄, and Mn-Zn ferrite) on the distribution of pyrolysis products. The presence of ZnWO₄, ZnAl₂O₄, and Mn-Zn ferrite exhibited the highest bio-oil yields, whereas the highest non-condensable gas yield and the lowest bio-oil yield was obtained with the addition of 2 % Ag/ZnO catalyst. According to the obtained results, ZnWO₄ promoted the production of oxygen-containing compounds while the presence of 2 % Ag/ZnO presented the highest amounts of hydrocarbons. The 2 % Ag/ZnO shows a greater effect on the production of monocyclic aromatic hydrocarbons but ZnWO₄ inhibits the formation of these compounds. The amounts of olefins slightly increased in the presence of ZnWO₄ while the ZnO significantly reduced the formation of olefins.
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