Catalyst separation system

Wherein a synthesis gas mainly composed of carbon monoxide gas and hydrogen gas, a reaction vessel for synthesis of hydrocarbons by a chemical reaction with the catalyst slurry comprising suspended solid catalyst particles in a liquid, and said hydrocarbon a filter for separating the catalyst slurry, the catalyst separation system comprising a gas-liquid separator, the that the liquid hydrocarbon is separated into a gaseous hydrocarbon and liquid hydrocarbon that is flowing out of the filter.