The H2 is separated and recycled to {HEAD ~ the alcohol synthesis zone} as {TAIL ~ a second source} of H2 
The H2 is separated and recycled to { HEAD ~ the alcohol synthesis zone } as { TAIL ~ a second source } of H2
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH