CO rich synthesis gas production

A chemical reactor for carrying out reforming of a first feed stream comprising a hydrocarbon gas and steam, said chemical reactor comprising:

• a shell comprising a heat source;
• and
• a reformer tube having a first end and a second end arranged to house catalyst material, said reformer tube being placed within the shell and being arranged to be heated by said heat source, said reformer tube comprising a first inlet for feeding said first feed stream into a first reforming reaction zone of said reformer tube,
• wherein said reformer tube comprises a feed conduct arranged to conduct a second feed stream in heat exchange contact with said catalyst material housed within said reformer tube and allow said second feed stream into a second reforming reaction zone of said reformer tube, said second reforming reaction zone being positioned downstream of said first reforming reaction zone,
• wherein said feed conduct is configured so that said second feed stream is only in contact with catalyst material in said second reforming reaction zone,
• wherein said feed conduct comprises a first part arranged for conducting said second feed stream in heat exchange contact with catalyst material housed within said reformer tube, and a second part arranged for inletting said second feed stream into said second reforming reaction zone of said reformer tube, and
• wherein said second part comprises second inlet(s) at more than one point along a longitudinal axis of said reformer tube and/or a frit material extending along at least a part of the longitudinal axis for letting said second feed stream be released into said second reforming reaction zone along at least a part of the longitudinal axis of the reformer tube housing said feed conduct.