Methanol autothermal

Hydrogen production by methanol autothermal reforming with high conductivity honeycomb supports... 

Researchers at the Chinese Academy of Sciences are developing a scalable methanol autothermal reforming (ATR) reactor. The microchannel reactor will be composed of multiple reactor chips (Figure 21). with each chip able to process enough methanol for approximately 100 We hydrogen. Both aluminum and stainless steel were evaluated for use as the chip... 

H., Hydrogen generation by methanol autothermal reforming in microchannel reactors, in Proceedings of the AIChE Spring Meeting (30 March - 3 April 2003), AIChE, New Orleans, 2003. 

Chen, G., Yuan, Q., Li, S., MicroChannel reactor for methanol autothermal reforming, Chin.J. Catal. 2002, 23, 22-23. 

Ouzounidou, M., Ipsakis, D., Voutetakis, S., Papadopoulou, S., Seferhs, P. (2009). A combined methanol autothermal steam reforming and PEM fuel cell pilot plant unit experimental and simulation studies. Energy, 34, 1733—1743. 

Figure 7.2 Product composition for methanol autothermal reforming as determined in a Microlith reactor prepared by Lyubovsld et al. [190] O/C ratio 0.58 S/C ratio 2 feed inlet temperature 100°C.

These investigations document the problem of hot spot formation in monoUthic reactors. The temperature of methanol autothermal reforming should not exceed 350 °C to minimise carbon monoxide formation. 

MPa (300—400 psig), using a Ni-based catalyst. Temperatures up to 1000°C and pressures up to 3.79 MPa (550 psia) are used in an autothermal-type reformer, or secondary reformer, when the hydrogen is used for ammonia, or in some cases methanol, production. 

Autothermal reactor for methanol synthesis using a numerical search technique... 

There are reaetions where the heat of reaetion ean be employed to preheat the feed when an exothermie reaetion is operated at a high temperature (e.g., ammonia N2 + SHj o 2NH3 or methanol CO + 2H2 o CH3OH synthesis, water-gas shift reaetion CO -1- H2O o H2 -1-CO2). These proeesses may be performed in fixed-bed reaetors with an external heat exehanger. The exehanger is primarily used to transfer the heat of reaetion from the effluent to the feed stream. The eombina-tion of the heat transfer-reaetion system is elassified as autothermal. These reaetors are self-suffieient in energy however, a high temperature is required for the reaetion to proeeed at a reasonable rate. 

ATR(l) [Autothermal reforming] A process for making CO-enriched syngas. It combines partial oxidation with adiabatic steam-reforming. Developed in the late 1950s for ammonia and methanol synthesis. Further developed in the 1990s by Haldor Topsoe. 

OSR) rather than autothermal reforming.23-26 The OSR concept has been reported for the first time in the reforming of methanol for H2 production27,28 and this methodology has been widely employed by others for the reforming of methanol and... 

The design of novel autothermal reactors and catalysts holds promises for efficient reforming of oxygenates such as methanol and ethanol. However, up to now, only limited studies have appeared in the literature. 

EXPERT AUTOTHERM. Development of 75 kW methanol reformer for working with 75 kW PEMs integrated in automobile vehicle. 

Commercial formaldehyde (formalin) 37% formaldehyde 10% methanol, 53% w/w water. 8750 longtons Vapour-phase autothermal catalytic oxidation of methanol. 

Autothermal Methanol Reforming 1 [AMR 1] Micro Structured Autothermal Methanol Reformer... 

Autothermal Methanol Reforming 2 [AMR 2] Micro Structured String Reactor for Autothermal Methanol Reforming... 

Figure 2.16 Methanol conversion as a function of temperature hydrogen selectivity vs. methanol conversion for autothermal methanol reforming [39] (by courtesy of ACS).

Integrated Autothermal Methanol Fuel Processor (Ballard)... 

Schuessler et al. [85] of XCELLSiS (later BALLARD) presented an integrated methanol fuel processor system based on autothermal reforming, which coupled fuel/water evaporation with exothermic preferential oxidation (PrOx) of carbon monoxide. The reactor technology was based, in contrast to most other approaches, on a sintering technique. 

Chen et al. [36] performed a comparison of micro structured steel and aluminum plates with a conventional monolith by varying the GHSV. Full conversion could be maintained for autothermal methanol reforming in the micro structures up to a GHSV of 40 000h 1, whereas conversion dropped to 80% at 20 000h 1 at the monolith. Even at 186 000 h, still 95% conversion could be achieved in the stainless-steel micro reactor. No significant performance differences were observed between the steel and aluminum plates. 

Schuessler et al. [85] applied sintering of copper and aluminum powder to form micro structured plates for an integrated autothermal methanol reformer (see Section 2.7.2). The powders were compressed before sintering at a pressure of 1000 bar. Sintering of copper is performed at temperatures between 500 and 700 °C, which allows for the bonding of the plates in a second sintering step (see the next section). 

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