From fixed-bed residue hydrogenation units to fluidized-bed residue hydrogenation units, Wobo has established hydrogen recovery systems. Starting with the first MTO unit’s methanol tail gas recovery to the largest methanol unit’s tail gas recovery, and from coal-to-liquid processes to CO purification, Wobo has built multiple large-scale hydrogen recovery and purification units in the refining, coal chemical, and new energy industries, accumulating extensive engineering experience.