Abstract: An apparatus (110) for heating a feedstock is proposed. The apparatus (110) comprises a plurality of electrically conductive pipelines (114) for accommodating the feedstock. The pipelines (114) are arranged so as to enable parallel feedstock flow. The apparatus (110) includes at least one power source and/or voltage source (126) set up to supply an electrical current to the pipelines (114) which heats the pipelines (114) by Joule heat which arises as the electrical current passes through conductive pipe material, in order to heat the feedstock. Each of the pipelines (110) has a first end (116) and a second end (118). At least one electrical insulator (132) is disposed at the first end (116) and the second end (118) such that the respective pipeline (114) and at least one supplying pipeline (120) and at least one discharging pipeline (122) are galvanically isolated from one another. The individual pipelines (114) are electrically interconnected in a series connection.

Abstract: An apparatus for carrying out a chemical reaction in a process fluid includes a reactor comprising one or more reaction tubes which have a number of electrically heatable tube segments which are connected to one another by an electrically conductive star bridge, and at least one power source configured to provide a multiphase alternating current with N phases to N phase lines at a predetermined voltage. N is an integer greater than or equal to 2. For each of the at least one power source, a number of power connections is provided, each of which is connected to at least one of the tube segments and to one of the phase lines of the power source. In the at least one power source, a star point is formed at which the phase lines of the power source are connected, wherein the star point is not connected to a ground connection.

Abstract: An apparatus for carrying out a chemical reaction in a process fluid includes a reactor comprising one or more reaction tubes which have a number of electrically heatable tube segments which are connected to one another by an electrically conductive star bridge, and at least one power source configured to provide a multiphase alternating current with N phases to N phase lines at a predetermined voltage. N is an integer greater than or equal to 2. For each of the at least one power source, a number of power connections is provided, each of which is connected to at least one of the tube segments and to one of the phase lines of the power source. In the at least one power source, a star point is formed at which the phase lines of the power source are connected, wherein the star point is not connected to a ground connection.