Devices are provided for introducing separately reactants to within {HEAD ~ the tubes} of the reactor and coolant to the channels defined between adjacent tubes of {TAIL ~ the bundle} 
Devices are provided for introducing separately reactants to within { HEAD ~ the tubes } of the reactor and coolant to the channels defined between adjacent tubes of { TAIL ~ the bundle }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL