Catalytic partial oxidation of higher hydrocarbon fuel components on Rh/Al2O3 coated honeycomb monoliths

Hartmann, Marco; Kaltschmitt, Torsten; Deutschmann, Olaf

doi:10.1016/j.cattod.2009.07.007

Cited by 32 publications

(42 citation statements)

References 24 publications

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“…For fuels with high aromatic content, we expect a rising coking tendency, which could contribute to the decreasing hydrogen molar fraction with increasing aromatic content. In general, this is confirmed for other alkanes or aromatic compounds in CPOX, which was reported by other groups [27,41].…”

Section: Influence Of Aromatic and Sulfur Contentsupporting

confidence: 76%

“…Due to this enhanced stability of the C-C-bonding, dodecane is more reactive towards CPOX compared to 1,2,4-trimethylbenzene and is therefore consumed at a higher rate. This is supported by various experiments with different hydrocarbon structure [27,41]. Additionally, slower decomposition of the formed hydrocarbons and the fuel in the absence of oxygen due to coke formation in the reforming zone is likely.…”

Section: Influence Of Aromatic and Sulfur Contentmentioning

confidence: 74%

“…Higher hydrocarbons have shown a tendency to form cracking products, which is mainly due to gas-phase reactions, occurring at high temperatures and fuel rich conditions [14,27,35,41]. In several studies on CPOX of higher hydrocarbons, the influence of gas-phase reactions is already unraveled on the product gas yield [22,[41][42][43].…”

Section: Formation Of By-products For Cpox Of Higher Hydrocarbonsmentioning

confidence: 99%

“…Nevertheless, a high syngas yield with low by-product formation and stable operation has been achieved for many different hydrocarbons and logistic fuels [1][2][3][4][5][24][25][26][27][28][29][30][31][32][33][34]. Still missing for sulfur-containing jet fuels are spatially-resolved concentration profiles, which are crucial for the understanding of the interplay between the main reactions and side reactions, e.g., cracking reactions, in dependence on the axial position.…”

Section: Introductionmentioning

confidence: 99%

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Spatial Concentration Profiles for the Catalytic Partial Oxidation of Jet Fuel Surrogates in a Rh/Al2O3 Coated Monolith

et al. 2016

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Abstract:The catalytic partial oxidation (CPOX) of several hydrocarbon mixtures, containing n-dodecane (DD), 1,2,4-trimethylbenzene (TMB), and benzothiophene (BT) as a sulfur compound was studied over a Rh/Al 2 O 3 honeycomb catalyst. The in-situ sampling technique SpaciPro was used in this study to investigate the complex reaction system which consisted of total and partial oxidation, steam reforming, and the water gas shift reaction. The mixtures of 83 vol % DD, 17 vol % TMB with and without addition of the sulfur compound BT, as well as the pure hydrocarbons were studied at a molar C/O-ratio of 0.75. The spatially resolved concentration and temperature profiles inside a central channel of the catalyst revealed three reaction zones: an oxidation zone, an oxy-reforming zone, and a reforming zone. Hydrogen formation starts in the oxy-reforming zone, not directly at the catalyst inlet, contrary to methane CPOX on Rh. In the reforming zone, in which steam reforming is the predominant reaction, even small amounts of sulfur (10 mg S in 1 kg fuel) block active sites.

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Section: Influence Of Aromatic and Sulfur Contentsupporting

confidence: 76%

Section: Influence Of Aromatic and Sulfur Contentmentioning

confidence: 74%

Section: Formation Of By-products For Cpox Of Higher Hydrocarbonsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spatial Concentration Profiles for the Catalytic Partial Oxidation of Jet Fuel Surrogates in a Rh/Al2O3 Coated Monolith

et al. 2016

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“…Due to the high temperature of approximately 1,000°C, some remaining fuel is pyrolyzed by gasphase reactions to form the coke precursors ethylene and propylene (Fig. 8), a relatively slow process that is kinetically controlled but presenting a threat for any downstream system such as fuel cell devices [94][95][96].…”

Section: Undesired Side Reactions In the Gas-phase: Catalytic Reformimentioning

confidence: 99%

Modeling of the Interactions Between Catalytic Surfaces and Gas-Phase

Deutschmann

2014

Catal Lett

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The catalytic surface interacts with the gasphase by a variety of chemical and physical processes. Hence, optimization of design and operation conditions of catalytic reactors do not only require the understanding of the catalytic reaction sequence but also its coupling with mass and heat transport and potential homogeneous reactions. The chemical, thermal, and mass-transport interactions between the catalytic surface and the gas-phase are discussed in terms of the individual and combined interactions. The state-of-the-art modelling of reactive flows and its coupling with the catalytic surface is summarized. The interactions are illustrated by a number of examples such as reforming of hydrocarbons, catalytic combustion, exhaust-gas after-treatment, each focusing on a special aspect of catalyst-gas interactions. The potentials and limitations of the numerical simulations will be discussed including experimental techniques for model validation.

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Catalytic Technology for Soot and Gaseous Pollution Control

Deutschmann

Konstandopoulos

2010

Handbook of Combustion

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In this chapter, stationary and automotive technologies for gaseous and particulate pollution abatement are discussed. Stationary pollution abatement technologies involve the reduction of NO x emissions from the exhaust gases of power plants, industrial boilers, and gas turbines, and are based on selective catalytic reduction (SCR) using ammonia. In automotive pollution control, internal combustion engines represent the major source for the emission of NO x , CO, and unburned hydrocarbons (HCs), whereas diesel engines contribute to the emission of soot and NO x . These gaseous pollutants can be minimized with primary measures, for example, modification of the combustion process, and with additional secondary measures (exhaust purification by catalysts). The most frequent type of catalytic converter in automobiles is the three‐way catalyst (TWC) in stoichiometric operated gasoline engines, which simultaneously converts NO x , CO, and HCs. NO x emissions from lean‐operated engines can be removed by urea‐SCR and NO x storage reduction catalysts (NSC). Catalytic CO oxidation is an essential reaction of the TWC and NSC, and is also applied in diesel engines using the diesel oxidation catalyst (DOC) that can oxidize gaseous HCs as well as HCs adsorbed onto soot particles. Diesel particulate filters (DPFs) are used to remove soot from diesel exhaust by filtration of the particles through the porous walls of the filter. The DPF application requires regeneration; that is, oxidation of the stored soot particles, which is accomplished by indirect (NO 2 ‐assisted) and direct (redox metal oxide‐based) catalytic oxidation of the accumulated soot particles in the DPF.

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Catalytic partial oxidation of higher hydrocarbon fuel components on Rh/Al2O3 coated honeycomb monoliths

Cited by 32 publications

References 24 publications

Spatial Concentration Profiles for the Catalytic Partial Oxidation of Jet Fuel Surrogates in a Rh/Al2O3 Coated Monolith

Spatial Concentration Profiles for the Catalytic Partial Oxidation of Jet Fuel Surrogates in a Rh/Al2O3 Coated Monolith

Modeling of the Interactions Between Catalytic Surfaces and Gas-Phase

Catalytic Technology for Soot and Gaseous Pollution Control

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