A double-wall reactor for hydrothermal oxidation with supercritical water flow across the inner porous tube

Supercritical water oxidation: A technical review

“…This element can be made of a sintered metal (stainless steel 136 or Ni-alloy 132,137 ) or a ceramic element, such as porous alumina. 138,139 The main characteristics of these reactors are summarized in Table 3.…”

Salt deposition problems in supercritical water oxidation

“…These solids exist in the form of sand, clay and rust, hardly sticking to reactor surfaces compared with nascent salt particles, so they are not responsible for scaling or plugging [16], and are defined as insoluble salts. Correspondingly, soluble salts refer to the salts that exhibit a high solubility in water at the ambient temperature, but undergo a dramatic decrease in the solubility when the temperature is heated to supercritical conditions, due to their small dielectric constants in SCW [20]. These salts seem to be much stickier, and are prone to adhere to the hot surface of the reactor.…”

“…5) has attracted much attention in the recent decade due to its 22 good performance in overcoming salt deposition and corrosion [65,103,104]. This reactor consists of a pressure-bearing wall and a porous transpiring wall, forming an annular mezzanine between these two walls [20,96,104,[114][115][116][117][118][119]. The porous wall is manufactured by sintered metal or ceramic, or several thin metal sheets or platelets that are bonded together, allowing heated transpiring water to pass through it.…”

A double wall reactor for supercritical water oxidation: Experimental results on corrosive sulfur mustard simulant oxidation

“…In order to overcome this problem a number of reactor design have been developed so far [1,[11][12][13][14][15][16][17]. However, it was reported that the reactor can age including corrosion of the core tip and coaxial tubes when exposed to acidic conditions [11][12][13].…”