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<p><a href="page.php?w=syngas">syngas</a>, pyrolysis gas has a high percentage of heavy tar fractions, which condense at relatively high temperatures, preventing its direct use in gas burners and internal combustion engines. </p>

<p>The process is used heavily in the <a href="page.php?w=chemical_industry">chemical industry</a>, for example, to produce <a href="page.php?w=ethylene">ethylene</a>, many forms of <a href="page.php?w=carbon">carbon</a>, and other chemicals from petroleum, coal, and even wood, or to produce <a href="page.php?w=coke_%28fuel%29">coke</a></p><p>
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