Effects of Oxygen Element and Oxygen-Containing Functional Groups on Surface Wettability of Coal Dust with Various Metamorphic Degrees Based on XPS Experiment

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/jamc/volume-2015/467242/figures/467242.fig.002a.svgz" name="467242.fig.002a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Beizao lignite</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/jamc/volume-2015/467242/figures/467242.fig.002b.svgz" name="467242.fig.002b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Yushuwan gas coal</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/jamc/volume-2015/467242/figures/467242.fig.002c.svgz" name="467242.fig.002c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Xinjulong fat coal</td></tr><tr class="fig-image" id="d"><td><object data="https://static-preview.hindawi.com/articles/jamc/volume-2015/467242/figures/467242.fig.002d.svgz" name="467242.fig.002d" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(d) </b>Yangquan anthracite</td></tr></table>

<div>XPS peak chart of coal samples with different metamorphic grades.</div>

Journal of Analytical Methods in Chemistry

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Figure 2

Figure 2: Effects of Oxygen Element and Oxygen-Containing Functional Groups on Surface Wettability of Coal Dust with Various Metamorphic Degrees Based on XPS Experiment 

Figure 2 | Effects of Oxygen Element and Oxygen-Containing Functional Groups on Surface Wettability of Coal Dust with Various Metamorphic Degrees Based on XPS Experiment 