Autothermal reforming ethanol

Oxidative Steam Reforming (OSR) / Autothermal Reforming of Ethanol... 

Oxidative steam reforming/autothermal reforming of ethanol... 

Fig. 11 Free energy changes in the oxidative steam reforming/autothermal reforming of ethanol, acetaldehyde and methane.

Kinetics. Being a relatively new approach for the production of H2 from ethanol, work on the kinetics of the OSR/autothermal reforming of ethanol has been very limited in the literature. Kinetic studies would be very helpful to understand the rate determining step and activation energies of this complex reaction. 

Table 7 References on oxidative steam reforming (OSR) and autothermal reforming of ethanol for hydrogen production... 

Scheme 6 Proposed reaction pathway for the oxidative steam reforming/ autothermal reforming of ethanol. The dehydration into ethylene intermediate followed by ethylene reforming are not shown. 

This review analyzed the chemistry involved, thermodynamics, catalysts used, reaction pathways and mechanisms of various reforming techniques reported for the conversion of ethanol into H2-rich gas. The known reforming processes are broadly classified into three categories, namely steam reforming of ethanol (SRE), partial oxidation of ethanol (POE) and oxidative steam reforming (OSR)/autothermal reforming of ethanol. All these reactions are thermodynamically favorable even at lower temperatures, above 200 °C. 

Figure 2.29. H2 and CO selectivities in the oxidative steam reforming/autothermal reforming of ethanol over selected catalysts. Data reported at complete conversion of ethanol and obtained using 02/EtOH = 0.36, H20/EtOH = 2.28, and P = I atm and calculated by including CH4 (solid lines) and excluding CH4 (broken lines) in the calculations. Catalysts (a) Pd/ZnO, (b) NiRh/Ce02, (c) Ru/A1203,...

Ru impregnated y-Al203 catalyst was washcoated on cordierite monolith/ceramic forms and pellets. Among them, the Ru supported on ceramic foams exhibited better performance in the autothermal reforming of ethanol probably due to smaller pore size and higher tortuosity of the support. 

F. Gallucd, M. Van Sint Annaland and J. A. M. Kuipers, Pure hydrogen production via autothermal reforming of ethanol in a fluidized bed membrane reactor A simulation study, Int. J. Hydrogen Energy, 2010,35, 1659-1668. 

Figure 7.6 Schematic of the fluidized bed membrane reactor for autothermal reforming of ethanol. Same concept as for methane as feed gas, (Source after Ref [79])...

It is under development for various fuels such as methanol, ethanol, LPG and gasoline. The complete fuel processor was composed of a catalytic autothermal reformer reactor, a heat exchanger for cooling the reformate downstream of the CAR,... 

Membrane reactors for autothermal reforming of methane, methanol, and ethanol... 

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