Selective Adsorption of Different Flavors by Waste Porcelain Powder/Glass Composite Porous Ceramics

doi:10.16552/j.cnki.issn1001-1625.2025.0840

Abstract

Abstract:

By adjusting the ratio of waste porcelain powder and glass powder， porous ceramics with different porosities were sintered at a series of temperatures gradients from 910 ℃ to 990 ℃. Porous ceramics with different porosities were used as adsorbents to evaluate their adsorption/desorption performance for six flavors. The retained components within the porous ceramics were elucidated， and a release model for these flavors from the porous ceramics was established. The results indicate that the porous ceramics with 40% porosity exhibits the highest specific surface area， reaching 2.33×10⁶ mm²/g， along with the greatest adsorption capacity （223.98~301.82 mg/g） and the shortest adsorption time （2.68~9.90 s） for all six flavors. The dense pore network of the high porosity porous ceramics effectively shortens the diffusion path of the flavors， facilitating a faster adsorption rate. In the flavor release experiments， the release rate of the three alcohol-soluble flavors approach 100%， whereas those of three water-soluble flavors all remain below 70%. The main retained components of the three water-soluble flavors in the porous ceramics are DL-glyceraldehyde， L-lactic acid， and 5-hydroxymethylfurfural， respectively. These retained components contain two types of polar functional groups from among hydroxyl group （—OH）， aldehyde group （—CHO）， and carboxyl group （—COOH）， and they form a strong hydrogen-bonding network with the hydroxyl group on the surface of porous ceramics， which enhances the adsorption efficacy of the porous ceramics towards them.

Key words: porous ceramics, flavor, porosity, release rate, polar group, hydrogen bond

CLC Number:

TM285

ZENG Yingzi, DENG Tengfei. Selective Adsorption of Different Flavors by Waste Porcelain Powder/Glass Composite Porous Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(2): 613-624.

Figures/Tables 17

References 23

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Material	Mass fraction/%
Material	SiO₂	Al₂O₃	K₂O	Na₂O	MgO	CaO	Fe₂O₃	LOI	Other
Waste porcelain powder	69.90	22.73	2.96	1.22	0.60	0.81	0.32	0.74	0.72
Glass powder	58.27	5.25	0.36	11.26	3.92	13.08	0.72	4.54	2.60

Material	Mass fraction/%
Material	SiO₂	Al₂O₃	K₂O	Na₂O	MgO	CaO	Fe₂O₃	LOI	Other
Waste porcelain powder	69.90	22.73	2.96	1.22	0.60	0.81	0.32	0.74	0.72
Glass powder	58.27	5.25	0.36	11.26	3.92	13.08	0.72	4.54	2.60

Flavor No.	Solubility	Formula composition
B1	Water-soluble	Glucose， pure water， lactic acid， sodium dehydroacetate
B2		Tobacco extract， jujube tincture， lactic acid， fig extract， jujube net oil， citric acid， fenugreek extract， tomato extract， propylene glycol， pure water
B3		Raisin fruit reactants， blackberry extract， chicory root extract， rye extract， propylene glycol， pure water
C1	Alcohol-soluble	Maotai-flavor liquor， furanone， alcohol， propylene glycol， purified water
C2		Alfalfa distillation， Peru flow extract， mint flow extract， clove stem flow extract， alcohol， propylene glycol
C3		Tobacco extract， damascenone， citral， myrrh oil， lemon oil， sweet fennel oil， vanilla extract， tamarind extract， fenugreek tincture， alcohol

Flavor No.	Solubility	Formula composition
B1	Water-soluble	Glucose， pure water， lactic acid， sodium dehydroacetate
B2		Tobacco extract， jujube tincture， lactic acid， fig extract， jujube net oil， citric acid， fenugreek extract， tomato extract， propylene glycol， pure water
B3		Raisin fruit reactants， blackberry extract， chicory root extract， rye extract， propylene glycol， pure water
C1	Alcohol-soluble	Maotai-flavor liquor， furanone， alcohol， propylene glycol， purified water
C2		Alfalfa distillation， Peru flow extract， mint flow extract， clove stem flow extract， alcohol， propylene glycol
C3		Tobacco extract， damascenone， citral， myrrh oil， lemon oil， sweet fennel oil， vanilla extract， tamarind extract， fenugreek tincture， alcohol

Porosity/%	Specific surface area/（mm²·g^-1）	Average pore size/nm
10	3.03×10⁵	742
20	7.42×10⁵	643
30	1.19×10⁶	637
40	2.33×10⁶	464