Structured powders for carbon dioxide capture
A structured powder for capturing CO 2 from a gas stream includes an agglomerated powder, wherein magnesium hydroxide is 5 wt % to 90 wt % of the powder, and particles of the powder have a mean diameter of 1 micron to 40 microns. The structured powder has a mean largest dimension of 1 mm to 250 mm and an internal porosity of 10 vol % to 50 vol %.
1 . A structured powder comprising:
an agglomerated powder, wherein magnesium hydroxide is 5 wt % to 90 wt % of the agglomerated powder, and powder particles of the agglomerated powder have a mean diameter of 1 micron to 40 microns and a surface area of 0.5×10 6 m 2 /m 3 to 5×10 6 m 2 /m 3 ;
wherein the structured powder has a mean largest dimension size of 1 mm to 250 mm and an internal porosity of 10 vol % to 50 vol %.
2 . The structured powder of claim 1 , wherein the agglomerated powder is 95 wt % to 100 wt % of the structured powder.
3 . The structured powder of claim 1 , wherein added binders are 0 wt % to 1 wt % of the structured powder.
4 . The structured powder of claim 1 , wherein the structured powder has a moisture content of 0 wt % to 15 wt %.
5 . The structured powder of claim 1 , wherein the agglomerated powder comprises one or more minerals, the one or more minerals comprising Mg(OH) 2 , CaSiO 3 , Mg 3 Si 2 O 5 (OH) 4 , Mg 10 Fe 2 (CO 3 )(OH) 24 ·2H 2 O, Mg 6 Fe 3 (OH) 16 (CO 3 )(H 2 O) 4 , Ca(OH) 2 , Fe(OH) 2 , Mn(OH) 2 , Sr(OH) 2 , Ba(OH) 2 , CaO, MgO, SrO, BaO, Ca 2 SiO 4 , Ca 3 SiO 5 , Ca 3 Si 2 O 7 , Ca 7 MgSi 4 O 16 , Ca 3 MgSi 2 O 8 , Ca 2 MgSi 2 O 7 , CaMgSi 2 O 6 , CaFeSiO 4 , Mg 2 SiO 4 , MgSiO 3 , Ca 2 Fe 2 O 5 , Ca 3 Al 2 O 6 , Ca 12 Al 14 O 33 , CaAl 4 O 7 , CaAl 12 O 19 , MgFe 2 O 4 , Ca 2 Al 2 SiO 7 , or a combination thereof.
6 . The structured powder of claim 5 , wherein the one or more minerals comprise brucite.
7 . The structured powder of claim 1 , wherein magnesium hydroxide is 15 wt % to 70 wt % of the agglomerated powder.
8 . The structured powder of claim 1 , wherein the powder particles of the agglomerated powder have a mean diameter of 4 microns to 6 microns, a d 80 diameter of 1 microns to 10 microns, and a d 99 diameter of 5 micron to 20 microns.
9 . The structured powder of claim 1 , wherein the powder particles of the agglomerated powder have a surface area of 0.5×10 6 m 2 /m 3 to 5×10 6 m 2 /m 3 , a Sauter mean diameter (D[3,2]) of 2 microns to 4 microns and a De Brouckere mean diameter (D[4,3]) of 2 microns to 5 microns.
10 . The structured powder of claim 1 , wherein the structured powder is a pellet having a spherical shape and having a mean diameter of 1 mm to 30 mm.
11 . The structured powder of claim 1 , wherein the structured powder has an internal porosity of 20 vol % to 40 vol %, and wherein the structured powder comprises pores homogeneously distributed throughout.
12 . The structured powder of claim 1 , wherein the structured powder has a compressive strength of 50 kPa to 500 kPa.
13 . The structured powder of claim 1 , wherein the powder particles of the agglomerated powder have a Sauter mean diameter (D[3,2]) of 0.5 microns to 10 microns.
14 . The structured powder of claim 1 , wherein the powder particles of the agglomerated powder have a De Brouckere mean diameter (D[4,3]) of 0.5 microns to 10 microns.
15 . The structured powder of claim 1 , wherein the powder particles of the agglomerated powder have a Sauter mean diameter (D[3,2]) of 0.5 microns to 10 microns and a De Brouckere mean diameter (D[4,3]) of 0.5 microns to 10 microns.
16 . The structured powder of claim 1 , wherein the powder particles of the agglomerated powder have a Sauter mean diameter (D[3,2]) of 2 microns to 4 microns, and a De Brouckere mean diameter (D[4,3]) of 2 microns to 5 microns.
17 . A method of making a plurality of bodies of the structured powder of claim 1 , the method comprising:
adding a powder to an agglomerator;
adding water to the powder, wherein the agglomerator forms precursor structured powder bodies comprising the powder and the water; and
aging the precursor structured powder bodies to evaporate residual water therefrom and to form the structured powder bodies.
18 . A structured powder comprising:
an agglomerated powder, wherein magnesium hydroxide is 5 wt % to 90 wt % of the agglomerated powder, powder particles of the agglomerated powder have a mean diameter of 1 micron to 40 microns and a surface area of 5×10 4 m 2 /m 3 to 5×10 7 m 2 /m 3 , and the powder particles of the agglomerated powder have a Sauter mean diameter (D[3,2]) of 0.5 microns to 10 microns;
wherein the structured powder has a mean largest dimension size of 1 mm to 250 mm and an internal porosity of 10 vol % to 50 vol %.
19 . A structured powder comprising:
an agglomerated powder, wherein magnesium hydroxide is 5 wt % to 90 wt % of the agglomerated powder, powder particles of the agglomerated powder have a mean diameter of 1 micron to 40 microns and a surface area of 5×10 4 m 2 /m 3 to 5×10 7 m 2 /m 3 , and the powder particles of the agglomerated powder have a De Brouckere mean diameter (D[4,3]) of 0.5 microns to 10 microns;
wherein the structured powder has a mean largest dimension size of 1 mm to 250 mm and an internal porosity of 10 vol % to 50 vol %.