As expected, the data on the mass yield indicated a decreasing trend at higher temperatures and longer holding times because of more intense activation (or gasification) reactions.
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Optimization of Physical Activation Process by CO<sub>2</sub> for Activated Carbon Preparation from Honduras Mahogany Pod Husk.
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The sentences
Similarly, the texture characteristics also indicated an increasing trend with the residence time extending from 0 min to 30 min but slightly decreased as the time was extended to 60 min.