Hello JulianBianchi , I think you are "correct" and "incorrect" at the same time. There's a Johnson Mathey Hydrogen purificator system, which was recently confirmed in a NASA paper (link below) to produce anomalous heat and transmutations. AFAIK this was never used by Fleischmann and Pons, but used in 1989 by the same authors of the recent report as a way to verify the claims of Fleischmann and Pons, but they considered it a failure as they were trying to see neutrons (which they did not) but they did see Anomalous heat.
The "incorrect" part is that can is asking for a system that produces a flame only with catalytic effect and not with arcing. I know that H can be "burnt" by a catalytic system without flame or arc, and this has been shown, but is not even close to be a "torch" and is a surface phenomena that can produce heat and glow but not a flame.
https://sci-hub.se/https://www…abs/pii/S0360319920333462 (recent Fralick et al publication of anomalous heat and transmutations).
but they considered it a failure because they did not seen neutrons.
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Cold fusion does not generate neutron because it is a softer fusion than plasma laser fusions.
FPE is not the cold fusion it is just D Loading inside Pd. And without D2 no coolant in the bath, In case that Pd temperature was so high, FPE can create the excited state of 4He to cause neutron.