A reaction unit for catalytic conversion of a hydrocarbon or hydrocarbon containing feedstock to a petrochemical mixture, the reaction unit comprising: a housing comprising a bottom port arranged on a bottom of the housing and configured to provide fluidization gas into the housing , a feeding pipe passing through a top of the housing , and a top port arranged on a side of the housing near the top of the housing and configured to allow a product within the housing to be removed from the reaction unit ; a fluid bed distributor plate located at a bottom of the housing ; an emulsifying device coupled to a first end of the feeding pipe and configured to provide dispersed oil droplets inside a continuous water phase to the feeding pipe ; a fluidization valve arranged in the bottom port and configured to control an amount of fluidization gas entering the housing ; a feedstock valve arranged in the feeding pipe and configured to control an amount of feedstock emulsion from the emulsifying device into the feeding pipe ; a effluent gas valve arranged in the top port and configured to control an amount of effluent gas exiting the housing ; a controller , which is coupled to the fluidization valve , the feedstock valve , and the effluent gas valve and which is configured to control heat generated from burning coke in the housing by independently controlling the fluidization valve , the feedstock valve , and the effluent gas valve ; a regeneration zone and a stripping zone located above the fluid bed distributor plate , in which catalytic particles are housed; a reaction zone located above the stripping zone ; and a condensation zone located above the reaction zone , in which a petrochemical product fluid is condensed. a housing comprising a bottom port arranged on a bottom of the housing and configured to provide fluidization gas into the housing , a feeding pipe passing through a top of the housing , and a top port arranged on a side of the housing near the top of the housing and configured to allow a product within the housing to be removed from the reaction unit ; a fluid bed distributor plate located at a bottom of the housing ; an emulsifying device coupled to a first end of the feeding pipe and configured to provide dispersed oil droplets inside a continuous water phase to the feeding pipe ; a fluidization valve arranged in the bottom port and configured to control an amount of fluidization gas entering the housing ; a feedstock valve arranged in the feeding pipe and configured to control an amount of feedstock emulsion from the emulsifying device into the feeding pipe ; a effluent gas valve arranged in the top port and configured to control an amount of effluent gas exiting the housing ; a controller , which is coupled to the fluidization valve , the feedstock valve , and the effluent gas valve and which is configured to control heat generated from burning coke in the housing by independently controlling the fluidization valve , the feedstock valve , and the effluent gas valve ; a regeneration zone and a stripping zone located above the fluid bed distributor plate , in which catalytic particles are housed; a reaction zone located above the stripping zone ; and a condensation zone located above the reaction zone , in which a petrochemical product fluid is condensed. <EOS>