The present application provides a kind of composite
geopolymer material and its preparation method and application, belong to
geopolymer material technical field.The present application provides
system initial
alkalinity with soluble salt ions with
papermaking black liquor ash, provides aluminum-
silicon precursor with
coal gangue powder, obtains rheological suitable
geopolymer slurry by
coupling control of proportioning, particle size and water-binder ratio and is shaped into sample blank;Then CO2-rich liquid is prepared by using composite amine solution to absorb
industrial furnace tail gas, the sample blank is soaked for a short time, the CO2-rich liquid is uniformly infiltrated into capillary hole, heated in low temperature and
high humidity environment, the CO2-rich liquid is slowly released CO2 in the board, and the gel network evolves synchronously, forms uniform and stable
carbonate microcrystal and dense pore wall, rapidly improves the surface density and dimensional stability, realizes the resourceization of CO2 and the closed-loop circulation of amine solution, the process does not need additional NaOH / water glass, the
corrosion and
safety risk are low, and it is suitable for continuous industrial production.