Purification device and purification method of isopentane

The invention provides a purification device and a purification method of isopentane. The isopentane purification device comprises an adsorption system, a gasification device, a temperature control device and a gas collection device. Isopentane mixed gas obtained by gasification of the gasification device flows through the adsorption system, impurities are adsorbed by molecular sieves filled in the adsorption tower, and finally high-purity isopentane is obtained. When the adsorption system stops adsorption, the adsorption system is subjected to desorption treatment, so that the molecular sieve in the adsorption system is activated to facilitate subsequent re-adsorption. The purification device has the advantages of simple structure, low cost and low energy consumption. Proper adsorption temperature and adsorption pressure are controlled in the adsorption and purification process, and molecular sieves with different pore diameters are filled in the first adsorption tower, the second adsorption tower and the th