Abstract: A fuel tank venting system for an automotive vehicle comprising: a fuel tank comprising a vapor dome, a refueling pipe, a fuel vapor trap that is connected to the fuel tank by an inlet conduit, wherein the inlet conduit is connected with the fuel tank through an orifice which is permanently open, the orifice being arranged in the vapor dome of the fuel tank in a static condition and a normally closed shutter device that communicates with the atmosphere and that is connected to the fuel vapor trap by an outlet conduit, the normally closed shutter device comprising an electrically-actuated valve being closed when the electrically-actuated valve is de-energized, wherein the normally closed shutter device is configured to be open during vehicle refueling process and to be closed when the fuel in the fuel tank reaches a predetermined fill level and when the vehicle is in normal operation.

Abstract: A vapor emission control system for recovering hydrocarbon vapors displaced as vessels are loading consisting of two stages of carbon adsorption vapor recovery units. The first stage with two or more parallel carbon beds recovers the heavier C4-C6+ hydrocarbons on a first carbon bed which are then removed as a gas via vacuum and then converted into a liquid product via a vapor-to-liquid conversion unit. Lighter C2-C3 hydrocarbon vapor discharged from the first stage is recovered on two or more parallel carbon beds of the second stage. The vapor is then removed via vacuum as a concentrated gas for use as fuel or sent to a flare. The hydrocarbon lean first portion of the off-gas from each vacuum desorption is recycled to the other in-parallel carbon bed. The load and regeneration cycles alternate for the two carbon beds in each of the two stages based on an optimized time cycle.