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Showing 1 to 5 of 5 for “"COKE DEPOSITION"”.
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Impacts of Vanadium and Coke Deposition on CO2 Gasification of Nickel Catalysts Supported on Activated Carbon from Petroleum Coke
… carbon (AC) catalysts, produced from petroleum coke, were investigated at 700-900 °C using a thermogravimetric analyzer (TGA). The catalysts were coked by exposure to ethylene at 400-600 °C and/or impregnated with ~3.5 and 8.5 wt% vanadium, which is typically deposited during hydrodemetalization …
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Kinetic study of dry reforming of Methane with Ni over different supports and Pt/Al2O3
… by TEM, CHN, XRD, ICP, and XPS. Significant coke deposition was observed for Ni/Al2O3 and Pt/Al2O3. Ni/ZrO2 shows better stability with no significant change in morphology, no particle size change, and no visible coke deposition. Based on the experimental data, two theories were used for …
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Zeolite deactivation during hydrocarbon reactions: characterisation of coke precursors and acidity, product distribution
… and retention of heavy by-products, called coke, which causes catalyst deactivation. This deactivation is due to the poisoning of the acid sites and/or pore blockage. The formation of coke on hydrocarbon processing catalysts is of considerable technological and economic importance and a …
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Synthesis and characterisation of pillared clay catalysts for hydro-cracking of heavy liquid fuels
… cost effective. However, in practice excessive coke deposition took place leading to negative total conversion. This was probably due to a very low hydrogen pressure, unable to have any hydro cracking effect even under microwave irradiation. The decomposition of bio-oil under microwave …
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ΜΕΛΕΤΗ ΤΗΣ ΑΠΟΔΡΑΣΤΙΚΟΠΟΙΗΣΗΣ ΚΑΤΑΛΥΤΩΝ ΚΑΤΑ ΤΗΝ ΥΔΡΟΓΟΝΟΑΠΟΘΕΙΩΣΗ ΥΠΟΛΕΙΜΜΑΤΩΝΑΠΟΣΤΑΞΗΣ ΑΡΓΟΥ ΠΕΤΡΕΛΑΙΟΥ ΘΑΣΟΥ
… VERSUS CATALYST OPERATING TIME), CURVES OF COKE AND METAL (V, NI) DEPOSITS WITH RESPECT TO OPERATING TIME. THE NITROGEN ADSORPTION-CAPILLARY CONDENSATION AND THE MERCURY DOROSIMETRY TECHNIQUES WERE APPLIED TO DETERMINE PORE VOLUME DISTRIBUTIONS AND SPECIFIC SURFACE AREAS OFCATALYST SAMPLES …