Reactor

A reactor for causing a reaction of a raw material fluid by a heat exchange between the raw material fluid and a heat medium to generate a product, the reactor comprising:

• a main reactor core including a main reaction flow channel through which the raw material fluid flows and causes the reaction of the raw material fluid, and a main temperature control flow channel through which the heat medium flows along a flow direction of the raw material fluid flowing in the main reaction flow channel;
• and
• a pre-reactor core including a pre-reaction flow channel of which an outlet side connects with an inlet side of the main reaction flow channel and through which the raw material fluid flows, and a pre-temperature control flow channel of which an inlet side connects with an outlet side of the main reaction flow channel and through which the product serving as the heat medium flows along a flow direction of the raw material fluid flowing in the pre-reaction flow channel;
• wherein
• the main reactor core includes:
• main reactor structures each provided with the main reaction flow channel;
• and
• main temperature control structures alternately stacked on the main reactor structures and each provided with the main temperature control flow channel;
• the pre-reactor core includes:
• pre-reactor structures each provided with the pre-reaction flow channel;
• and
• pre-temperature control structures alternately stacked on the pre-reactor structures and each provided with the pre-temperature control flow channel;
• and
• the outlet side of the pre-reaction flow channel is directly connected to the inlet side of the main reaction flow channel.