4.1.3. Deposition on 100 kW reactor probes
A white and dust-like layer covered most of the area of the
probe. Layer thickness increased with the portion of RDF being
somewhat thinner when firing SAC/RDF blends than the
corresponding PC/RDF blends. When firing coals alone the layer was depleted from about 50- to 140- up from wind-side
remaining the clean probe. Maximum deposit thickness with
peak-shaped form was found at the wind-side (Fig. 6).
Cl deposition was strongly dependent on feedstock and
probe site (Fig. 7). Highest Cl concentrations in deposits were
produced when firing 40PC60RDF, i.e., the blend with largest
RDF portion. Cl deposition was strongest at 50- up from wind
position but was also strong at lee position. Decrease of probe
surface temperature from 500 to 420 -C tended to strengthen
somewhat Cl deposition. Cl deposition was weak (