The embodiment of the invention discloses a high-
silicon composite
molecular sieve adsorbent for removing VOCs and a preparation method thereof. The preparation method comprises the following steps: mixing an aluminum source I, an alkali source I and H2O, adding the mixture into a
silicon source I, and carrying out ultrasonic aging treatment to obtain a Y-type
molecular sieve guiding agent; mixingH2O, an alkali source II and an aluminum source II, adding n-
butylamine and a
silicon source II, carrying out a
crystallization reaction under the
microwave condition to obtain ZSM-5 crystallizationturbid liquid; adding a Y-type
molecular sieve guiding agent, an aluminum source III and H2O into the ZSM-5
crystallization turbid liquid, adjusting the pH value to 12-12.5, performing hydrothermal
crystallization treatment under a
microwave condition, performing
filtration and
water washing after crystallization is completed to obtain a
filter cake, and performing pulping treatment on the filtercake to obtain an
emulsion; carrying out acid
pickling on the
emulsion, and then sequentially carrying out filtering, washing,
drying and hydrothermal
roasting treatment to obtain high-silicon composite molecular
sieve powder; stirring the prepared
powder with glass fibers, silica
sol and H2O at a high speed to obtain mixed
slurry, performing vacuum degassing, and performing spray molding to obtain the high-silicon composite molecular
sieve adsorbent.