Fluid reactor device and method for operating a fluid reactor device

A fluid reactor device, in particular a fluid purification device, comprising:

• a heat-transfer bed comprising heat storage material, wherein the heat storage material is configured to heat fluid flowing through the heat storage material such that the fluid heats up and reacts while flowing through the heat storage material;
• a first plenum fluidly coupled to a first opening of the heat-transfer bed;
• a second plenum fluidly coupled to a second opening of the heat-transfer bed;
• and
• a heat blocking element arranged in the first plenum,
• wherein the first plenum and the second plenum are configured to alternatingly supply the fluid to the heat-transfer bed such that the fluid heats up and reacts while flowing through the heat storage material,
• wherein, during a time period in which one of the first plenum and the second plenum is supplying the fluid to the heat-transfer bed, the other one of the first plenum and the second plenum is draining the reacted fluid from the heat-transfer bed,
• wherein the heat blocking element is spaced apart from the heat-transfer bed and is spaced apart from a housing of the first plenum, and
• wherein the heat blocking element extends beyond the first opening and is configured to limit heat emission from the heat storage material into the first plenum.