Characterization of coke deposited on Pt/alumina catalyst during reforming of liquid hydrocarbons

Shamsi, Abolghasem; Baltrus, John P.; Spivey, James J.

doi:10.1016/j.apcata.2005.07.002

Cited by 129 publications

(70 citation statements)

References 31 publications

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“…In comparison to Rh, Al 2 O 3 supported Pt catalysts have shown higher tendency to coke formation. Shamsi et al, 2005 [48] examined the use of Pt/Al 2 O 3 catalyst in ATR of tetradecane, decalin, and methylnaphthalene as model hydrocarbons. They reported that type of hydrocarbons affects the amount of coke deposited on the catalyst, with decalin showing the least amount in comparison to the other two.…”

Section: Al 2 O 3 Supported Catalystmentioning

confidence: 99%

Recent Advances in Hydrogen Production Via Autothermal Reforming Process (ATR): A Review of Patents and Research Articles

Nahar¹,

Dupont²

2013

CHENG

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Abstract:This review examines recent patents and research articles in autothermal reforming (ATR) of fossil fuels like gasoline, diesel, JP-8 along with renewable fuels such as methanol, ethanol, glycerol, butanol, bio-oils and biodiesel into H 2 gas. The focus of the research was the recent developments in terms of ATR reformer design, ATR fuel processors, reformer start up, and reforming catalysts to determine the opportunities for R&D in this area. The production of H 2 by ATR of fossil fuels has been widely investigated; several catalytic studies based on various noble and non-precious metals like Rh and Ni are available, restricting new investigations. In contrast, H 2 production from bio feedstock like bio-oils, biodiesel, ethanol, and butanol are very recent and offer considerable room for further investigation..

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Section: Al 2 O 3 Supported Catalystmentioning

confidence: 99%

Recent Advances in Hydrogen Production Via Autothermal Reforming Process (ATR): A Review of Patents and Research Articles

Nahar¹,

Dupont²

2013

CHENG

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“…[23][24][25][26] The main feature of this organic matter is its high reactivity towards oxidation as seen in temperatureprogrammed oxidation experiments. 23,25,26 Soluble coke contains more hydrogen than the insoluble one. As usual, solvents are not effective in removing insoluble coke.…”

Section: Removal Of Soluble Cokementioning

confidence: 99%

“…Removal of soluble coke (more hydrogenated) reduces risk of ignition of insoluble coke. 23,25,26 The presence of soluble coke and foulant elements (over the catalyst surface) may favor local flashing zones, thus forming refractory compounds. 2,28 Component interaction may occur on overheating.…”

Section: Removal Of Insoluble Cokementioning

confidence: 99%

The importance of pre-treatment of spent hydrotreating catalysts on metals recovery

et al. 2011

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Recebido em 25/1/10; aceito em 2/6/10; publicado na web em 17/9/10 This work describes a three-step pre-treatment route for processing spent commercial NiMo/Al 2 O 3 catalysts. Extraction of soluble coke with n-hexane and/or leaching of foulant elements with oxalic acid were performed before burning insoluble coke under air. Oxidized catalysts were leached with 9 mol L -1 sulfuric acid. Iron was the only foulant element partially leached by oxalic acid. The amount of insoluble matter in sulfuric acid was drastically reduced when iron and/or soluble coke were previously removed. Losses of active phase metals (Ni, Mo) during leaching with oxalic acid were compensated by the increase of their recovery in the sulfuric acid leachate.

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“…It shows that it is not possible to limit the coke formation by limiting the temperature because this one is too low to be interesting for the cooling application. Thus, some additives (such as tetralin or decalin [24], [65]) may be used to decrease the coke formation. It would also be necessary to study the influence of the Reynolds number of the flow to see if a higher flow speed can limit the coke production but this would interact with the related residence time.…”

Section: Titanium Reactorsmentioning

confidence: 99%

Characterisation of coking activity during supercritical hydrocarbon pyrolysis

Gascoin¹,

Gillard²,

Bernard³

et al. 2008

Fuel Processing Technology

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The active cooling of the Supersonic Combustion Ramjet engine, for hypersonic flight purpose, is ensured thanks to fuel, n-dodecane for the present study. The endothermic fuel pyrolysis, starting above 800 K, could generate an unwanted coke formation. Experimental tests up to 1125 K and between 1 MPa and 6 MPa have been performed on the hydrocarbon fuel pyrolysis to evaluate the coking activity. 316L stainless steel, low carbon steel and titanium reactors have been considered. A witness of the coke formation, based on its thermal insulation and pressure loss effects, has been found. A correlation between methane production and coke deposit was found. The coke has been studied with Scanning Electron Microscope (SEM), Energy Dispersion Spectroscopy (EDS), X-ray diffractometer and Fourier Transform Infrared (FTIR) spectroscopy. The porosity, the density and the permeability of the coke have been estimated.

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Characterization of coke deposited on Pt/alumina catalyst during reforming of liquid hydrocarbons

Cited by 129 publications

References 31 publications

Recent Advances in Hydrogen Production Via Autothermal Reforming Process (ATR): A Review of Patents and Research Articles

Recent Advances in Hydrogen Production Via Autothermal Reforming Process (ATR): A Review of Patents and Research Articles

The importance of pre-treatment of spent hydrotreating catalysts on metals recovery

Characterisation of coking activity during supercritical hydrocarbon pyrolysis

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