A carbonaceous waste recycling apparatus configured to convert carbonaceous waste to a hydrocarbon pyrolysis product, the apparatus comprising a reactor system for pyrolysis of a carbonaceous feed material, the reactor system comprising a fluidised bed reactor (301, 302; 401; 501; 801; 901) and at least one injector (317; 405; 505; 602; 702; 802a, 802b, 802c; 902a, 902b; 1001) for supplying fluid into the fluidised bed reactor, wherein: the at least one injector comprises an internal flow passage (412; 512; 605; 705; 805a, 805b, 805c; 905a, 905b; 1121) extending from an inlet (406; 506; 606; 706; 806a, 806b, 806c; 906a, 906b; 1002) to an outlet (407; 507; 607; 707; 807a, 807b, 807c; 907a, 907b; 1003), the at least one injector having a first section (408a; 508a; 608a; 708a; 808a, 808b, 808c; 908a; 1004a) including the inlet and a first portion of the internal flow passage, and a second section (408b; 508b; 608b; 708b; 809a, 809b, 809c; 909a; 1004b) including the outlet and a second portion of the internal flow passage; the at least one injector additionally comprises a temperature regulator for controlling fluid temperature in at least the second section of the injector, wherein the temperature regulator comprises a cooling jacket (409; 509; 603; 703; 810a, 810b, 810c; 910a, 910b; 1005) configured to receive a cooling fluid, and wherein the cooling jacket extends along and surrounds the second portion of the internal flow passage; the fluidised bed reactor contains a fluidised bed zone (303, 304; 402; 502; 804; 904) configured to accommodate a fluidised bed when the reactor system is in use; and the second section of the at least one injector is located inside the reactor, characterised in that said second section of the at least one injector extends into the fluidised bed zone so that the outlet of the injector is positioned in the fluidised bed zone; and in that the reactor and the at least one injector are configured so that the second section of the at least one injector extends a distance of from Y/8 to Y/2 into the fluidised bed zone, where Y is the diameter of the fluidised bed zone measured in the plane of the outlet, and/or wherein the reactor and the at least one injector are configured so that the outlet of the at least one injector is positioned at a distance of from Z/8 to Z/2 from the bottom of the fluidised bed zone, wherein Z is the height of the fluidised bed zone. the at least one injector comprises an internal flow passage (412; 512; 605; 705; 805a, 805b, 805c; 905a, 905b; 1121) extending from an inlet (406; 506; 606; 706; 806a, 806b, 806c; 906a, 906b; 1002) to an outlet (407; 507; 607; 707; 807a, 807b, 807c; 907a, 907b; 1003), the at least one injector having a first section (408a; 508a; 608a; 708a; 808a, 808b, 808c; 908a; 1004a) including the inlet and a first portion of the internal flow passage, and a second section (408b; 508b; 608b; 708b; 809a, 809b, 809c; 909a; 1004b) including the outlet and a second portion of the internal flow passage; the at least one injector additionally comprises a temperature regulator for controlling fluid temperature in at least the second section of the injector, wherein the temperature regulator comprises a cooling jacket (409; 509; 603; 703; 810a, 810b, 810c; 910a, 910b; 1005) configured to receive a cooling fluid, and wherein the cooling jacket extends along and surrounds the second portion of the internal flow passage; the fluidised bed reactor contains a fluidised bed zone (303, 304; 402; 502; 804; 904) configured to accommodate a fluidised bed when the reactor system is in use; and the second section of the at least one injector is located inside the reactor, characterised in that said second section of the at least one injector extends into the fluidised bed zone so that the outlet of the injector is positioned in the fluidised bed zone; and in that the reactor and the at least one injector are configured so that the second section of the at least one injector extends a distance of from Y/8 to Y/2 into the fluidised bed zone, where Y is the diameter of the fluidised bed zone measured in the plane of the outlet, and/or wherein the reactor and the at least one injector are configured so that the outlet of the at least one injector is positioned at a distance of from Z/8 to Z/2 from the bottom of the fluidised bed zone, wherein Z is the height of the fluidised bed zone.