A General Route of Using Lignite Depolymerized Derivatives for Catalyst Construction: Insights into the Effects of the Derivative Structures and Solvents.

For the Cu-based catalyst, the activity of the catalysts prepared using different phenyl carboxylic acids and fatty acids was also different ( Figure 8 ), but the changing trends of the activity were different from Zr-based catalysts. The activity of the Cu-based catalysts showed first an increasing and then a decreasing trend with the increasing number of carboxyl groups in phenyl carboxylic acids, with Cu-1,2-BDA giving the best performance.

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