Grams Jacek, Ryczkowski Robert, Chałupka Karolina, Sobczak Izabela, Rzeźnicka Izabela, Przybysz Kamila
Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
Adam Mickiewicz University, Faculty of Chemistry, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland.
Materials (Basel). 2019 Nov 19;12(22):3792. doi: 10.3390/ma12223792.
The main objective of this work was to evaluate an impact of a support on the efficiency of nickel catalysts in the high-temperature conversion of lignocellulosic biomass to hydrogen-rich gas. The most important parameters influencing catalytic performance of the catalysts were identified. The properties of three materials (ZSM-5, ZrO, and MCF (mesostructured cellular foam)) used as a support differing in surface acidity, surface area, pore structure, ability to interact with an active phase, and resistance to coking, have been studied. The results revealed that Ni/MCF, characterized by large pore size and pore volume, low acidity, small NiO crystallites size, and moderate interaction with the active phase, is the most efficient among studied catalysts, while an application of Ni on ZSM-5 support with high-acidity was not beneficial. The results suggest that structure of the support, in particular larger pore size and a better contact between an active phase and reaction intermediates, play an important role in the formation of gaseous products during thermal decomposition of lignocellulosic feedstock. On the other hand, high acidity of the support did not increase the formation of large amounts of hydrogen-rich gaseous products.
这项工作的主要目的是评估载体对镍催化剂在木质纤维素生物质高温转化为富氢气体过程中效率的影响。确定了影响催化剂催化性能的最重要参数。研究了用作载体的三种材料（ZSM-5、ZrO和MCF（介孔泡沫））的性能，它们在表面酸度、表面积、孔结构、与活性相相互作用的能力以及抗结焦性方面存在差异。结果表明，Ni/MCF具有大孔径和孔体积、低酸度、小氧化镍微晶尺寸以及与活性相适度相互作用的特点，在所研究的催化剂中效率最高，而将镍应用于高酸度的ZSM-5载体上并无益处。结果表明，载体结构，特别是较大的孔径以及活性相与反应中间体之间更好的接触，在木质纤维素原料热分解过程中气态产物的形成中起着重要作用。另一方面，载体的高酸度并没有增加大量富氢气态产物的形成。
