Journal
FUEL PROCESSING TECHNOLOGY
Volume 189, Issue -, Pages 74-79Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fuproc.2019.03.001
Keywords
Activated carbon; Potassium; De-intercalation; Pore structure; Surface properties
Funding
- National Natural Science Foundation of China [21376046]
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In this study, the potassium formed during the activation of petroleum coke with KOH as activation agent was quantified, and three de-intercalation reagents (acetic acid, water vapor, methanol) with different flow and at different temperature were used to de-intercalate the potassium. It is suggested that the activation process yields almost the same amount potassium in the free state as that in the potassium-graphite intercalation compounds. The results also indicated that the introduction of acetic acid (250 degrees C, 0.4ml/min), water vapor (200 degrees C, 0.4ml/min), methanol (150 degrees C, 0.4ml/min) could furthest improve the porosity and decrease the microcrystalline size as well as increase graphite layer spacing d(002.) Moreover, the de-intercalation reagents could accelerate the formation of oxygen-containing groups on the surface of the activated carbons. Based on these results, the deintercalation mechanism has been proposed.
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