Process for conversion of a feedstock comprising solid carbonaceous particles into at least a gaseous compound

A process for converting a feedstock comprising solid carbonaceous particles into at least one or more gaseous compounds, the process comprising:

• (a) supplying the feedstock at the bottom end of a vertically extending swirl chamber defined by a wall, a bottom and an upper end, the swirl chamber comprising a conical upper part with a decreasing diameter in upward direction, wherein the wall of the conical upper part of the swirl chamber has a first angle with the vertical;
• at least one tangential inlet at the bottom of the swirl chamber;
• and an outlet at the upper end of the swirl chamber
• (b) supplying an inert carrier gas tangentially to the swirl chamber through the at least one tangential inlet, forming a layer of solid carbonaceous feedstock particles on the wall of the conical upper part of the swirl chamber,
• (c) converting at least part of the solid carbonaceous feedstock into at least one of more gaseous compounds in the swirl chamber at elevated temperature, wherein the converting takes place in the layer of solid carbonaceous feedstock particles, and
• (d) discharging a stream comprising the one or more gaseous compounds via the outlet,
• wherein the process is pyrolysis of the solid carbonaceous particles, and
• wherein the heat for pyrolysis process is provided by heating the wall of the swirl chamber, by supplying heated feedstock to the swirl chamber, by supplying heated carrier gas to the swirl chamber, or combinations thereof, with the proviso that no particulate heat source in the form of heated catalyst particles or heated inert particles is supplied to the swirl chamber.