NOVELTY - The system comprises a first reactor, which is a gasifier having a first catalyst for converting methane to carbon monoxide, and a second reactor (2) that is fluidly connected to the first reactor and has a second catalyst for converting carbon dioxide to carbon monoxide and methane to carbon monoxide. The first reactor is configured as a fluidized bed. The second reactor is configured as a fixed bed. A ratio of hydrogen to carbon monoxide in the synthesis gas produced in the second reactor is 1.9-2.1. The methane concentration in the synthesis gas is less than 4%.    USE - The system is useful for converting biomass to synthesis gas (claimed) such as carbon monoxide and hydrogen.    ADVANTAGE - The system allows rapid conversion of the biomass to synthesis gas with high conversion efficiency.    DETAILED DESCRIPTION - The system comprises a first reactor, which is a gasifier having a first catalyst for converting methane to carbon monoxide, and a second reactor (2) that is fluidly connected to the first reactor and has a second catalyst for converting carbon dioxide to carbon monoxide and methane to carbon monoxide. The first reactor is configured as a fluidized bed. The second reactor is configured as a fixed bed. A ratio of hydrogen to carbon monoxide in the synthesis gas produced in the second reactor is 1.9-2.1. The methane concentration in the synthesis gas is less than 4%. The carbon dioxide exiting the second reactor is recycled to the first reactor. The second catalyst catalyzes reactions including carbon dioxide is added with hydrogen to obtain water and carbon monoxide and the methane is added with water to obtain carbon monoxide and hydrogen. The system further comprises a separator for removing water from gas produced in the first reactor before feeding that gas to the second reactor. The gas fed into the second contains less than 10% of water. An INDEPENDENT CLAIM is included for a method for converting biomass to synthesis gas.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of reactors.    Second reactor (2)    Dry reformer (4)    Condenser (6)    Streams. (8, 10, 12, 14)