The invention discloses an
ethylene absorbent and a preparation method thereof, belonging to the technical field of fruit, vegetable and flower fresh-keeping. The
ethylene absorbent is prepared by a carrier substance, a
metal promoter and a main reactant; the carrier substance is
active carbon, diatomite or
zeolite; the
metal promoter is cupric compound, manganous compound or molybdous compound; the weight of the
metal promotor is 1-5% of that of the carrier substance; the main reactant is the
divalent compound of
palladium; the weight of the main reactant is 0.3-5% of that of the carrier substance. The preparation method comprises the following steps: adding the acidified, filtered and dried carrier substance into the
aqueous solution of the metal promotor to obtain the mixture of the acidified carrier substance and the metal promotor, adding the
aqueous solution prepared by the main reactant into the above mixture, filtering and
drying the mixture of
aqueous solution and the above mixture to obtain the granular
ethylene absorbent. The invention is widely applied to fresh-keeping of various
respiration climacteric fruit, vegetables and flowers, and the ethylene absorbent of the invention is green, safe,
pollution-free and easy to regenerate; in addition, the
palladium compound in the ethylene absorbent can be recycled.