Hydrothermal burner

Fig. 1 Principles of the most outstanding SCWO reactor configurations a) tubular reactor developed at the university of Austin, Texas / /, commercialized by EWT, operated in Huntsville,Texas 111, capacity 5 gpm b) vessel reactor, MODAR Inc., Massachusetts /3/ c) transpiring wall reactor, Summit Research Corp., Santa Fe, New Mexico /4/ filmcooled coaxial hydrothermal burner developed at the ETH Zurich, Switzerland 15/...

The fourth type, the filmcooled coaxial hydrothermal burner 151 is under development at the ETH Zurich and, to our knowledge, it is operated experimentally with model substances at pilot scale level. 

Required Fuel Contents for Sewage Disposal by Means of Supercritical Wet Oxidation (SCWO) in a Pilot Plant Containing a Wall Cooled Hydrothermal Burner (WCHB)... 

SCWO bench-scale plant containing a Wall Cooled Hydrothermal Burner (WCHB)... 

La Roche, H. Lucas, M. Weber and Ch. Trepp, Rationale for the Filmcooled Coaxial Hydrothermal Burner", Briefing Book of the 1st International Symposium on Supercritical Water Oxidation, held on Amelia Island... 

SCWO reactors may be prone to rapid corrosion and plugging. Furthermore, the wall temperature is typically limited to about 900 K due to creep. To inhibit corrosion, prevent plugging, and overcome the temperature limit, the Wallcooled Hydrothermal Burner (WHB) is proposed as a generalized reactor concept. The WHB concept unifies several features of SCWO reactors which have been proposed in recent years. 

This concept was demonstrated at the Institute of Process Engineering and Cryogenics at ETH (Switzerland) during the last two years with the FilmCooled Hydrothermal Burner (FCHB). The FCHB operated at pressures of 25 MPa and temperatures up to 2000 K, cf. [1], Experiments and detailed analysis led to the basic design approach for SCWO reactors discussed herein which is based on wall boundary layer control and internal recirculation. 

Evolution of thinking about the importance of reactions between seawater and detrital clay minerals has come full circle in the past 35 years. Reverse weathering reactions were hypothesized in very early chemical equilibrium and mass balance (Mackenzie and Garrels, 1966) models of the oceans. Subsequent observations that marine clay minerals generally resemble those weathered from adjacent land and the discovery of hydrothermal circulation put these ideas on the back burner. Recent studies of silicate and aluminum diagenesis, however, have rekindled awareness of this process, and it is back in the minds of geochemists as a potentially important process for closing the marine mass balance of some element (see chapter 2). 

Ghanizadeh S, Bao X, Vaidhyanathan B, Burner J (2014) Synthesis of nano a-alumina powders using hydrothermal and precipitation routes a comparative study. Ceram Int 40 1311-1319... 

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