NOVELTY - Recovering ethylene and hydrogen involves carrying out compression boost by refinery dry gas through a stage of compression, post-secondary compression, the pressure increased to 2-3.6 MPa; absorbing cold oil in the boosted refinery dry gas for cooling, and then fed into the absorber; two-stage pressure swing adsorption steps of non-condensable gas discharged from the top of the absorption column; carrying out desorption; taking the top of the desorption column and recovered carbon-enriched component into the crude distillation tower, to obtain a high-purity ethylene fractionator.    USE - For recovering ethylene and hydrogen (claimed).    ADVANTAGE - The method provides ethylene having high purity i.e. more than 99%; and provides hydrogen having yield of 90-95%, and ethylene having yield of 92-98%; and has low cost, and low energy consumption operation.    DETAILED DESCRIPTION - Recovering ethylene and hydrogen by air-cooled oil refinery dry absorption, and combination of pressure swing adsorption method involves carrying out compression boost by refinery dry gas through a stage of compression, post-secondary compression, the pressure increased to 2-3.6 MPa; absorbing cold oil in the boosted refinery dry gas for cooling, and then fed into the absorber, discharging at the top of the absorption column a methane-rich, hydrogen, and nitrogen, non-condensable gases, absorbing the bottom of the absorption tower Two out of carbon and carbon by at least two components; two-stage pressure swing adsorption steps of non-condensable gas discharged from the top of the absorption column at 2-3.6 MPa pressure, and at 30-40 degrees C, from the bottom section of the hydrogen pressure swing adsorption tower into the crude extract from on the bottom by a bed packed with the adsorbent, discharging the adsorbed methane, nitrogen, and part of the hydrogen desorption process of the step-down by the reverse out from the adsorbent from the pressure swing adsorption period the crude bottoms hydrogen, pressurized feed fuel or feedstock gas pipeline network, not a lot of adsorbent and a small amount of methane, hydrogen, nitrogen and carbon from the crude extract hydrogen pressure swing adsorption overhead into the bottom Sec-poly(sulfonyl azide) (PSA) hydrogen purification, self-bottom-loaded through an adsorbent bed, a small amount of methane adsorbed, nitrogen and carbon and the second step-down procedure by reversing the above components desorbed from the adsorbent out two-stage pressure swing adsorption purification of hydrogen gas from the lower discharge tower blowdown or pressurized fuel into the gas pipeline network; hydrogen adsorbent is not discharged from the top, as a product of hydrogen; carrying out desorption by absorbing bottom of the absorption tower in the carbon by at least two components, into desorption tower, the top of the desorption column is recovered, and carbon-enriched component directly into the crude distillation tower bottom desorbers renewable oil or propane-based adsorbent return absorber recycle; taking the top of the desorption column and recovered carbon-enriched component into the crude distillation tower, the top of the crude distillation column effluent ethylene to ethylene can be further purified to obtain a high-purity ethylene fractionator the bottom of the crude distillation column effluent rich in ethane and carbon components.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart of a method of recovering ethylene and hydrogen by air-cooled oil refinery dry absorption, and combination of pressure swing adsorption method. Drawing includes non-English language text.