Electrically heated reactor and a process for gas conversions using said reactor

A method of performing a gas conversion process at high temperatures, comprising

• introducing at least one gaseous reactant into a reactor configuration wherein the reactor configuration comprises
• at least one electrically heated furnace which defines a space, with at least one reactor tube placed within the furnace space and said reactor tube having an exit and entrance outside of the reactor furnace, and wherein said furnace is further provided with
• at least one electrical radiative heating element suitable for heating to high temperatures in the range of 400 to 1400° C., said heating element being located inside said furnace in such a way that the heating element is in no direct contact with the at least one reactor tube;
• and
• a number of inspection ports in the furnace wall such to be able to visually inspect the condition of the at least one reactor tube on all sides of said reactor tube during operation, the total number of inspection ports being sufficient to inspect all reactor tubes present in the furnace at their full length and circumference;
• and
• wherein the heating duty of the furnace is at least 3 MW;
• electrically heating at least one heating element to a temperature in the range of 400-1400° C., and
• performing the high temperature gas conversion while inspecting the reactor tube by means of sight on the reactor tube.