There are currently many approaches in the literature to achieve this but they usually require high operating pressures, especially for the hydrocracking step to selectively produce the target fuel.
Yes, the conversion of plastics to liquid fuels is technically feasible at atmospheric pressure. The process involves pyrolysis, which is a thermochemical decomposition of organic material at elevated temperatures in the absence of oxygen. The process can be carried out using a range of different reactor designs, depending on the type of plastic being processed. The resulting liquid fuels can then be used as fuel for vehicles or for other applications. The process is also economically feasible, with some researchers estimating that the cost of producing one gallon of fuel from plastic is comparable to the cost of one gallon of regular gasoline.