Supercritical antisolvent precipitation of calcium acetate from eggshells

被引：13

作者：

Nobre, Luis C. S. ^{[1
,2
]}

Santos, Samuel ^{[3
]}

Palavra, Antonio M. F. ^{[1
,2
]}

Calvete, Mario J. F. ^{[4
]}

Nieto de Castro, Carlos A. ^{[1
,2
]}

Nobre, Beatriz P. ^{[1
,2
]}

机构：

[1] Univ Lisbon, Ctr Quim Estrutural, Inst Super Tecn, P-1049001 Lisbon, Portugal

[2] Univ Lisbon, Fac Ciencias, P-1049001 Lisbon, Portugal

[3] Univ Lisbon, Inst Super Tecn, CERENA, P-1049001 Lisbon, Portugal

[4] Univ Coimbra, Ctr Quim Coimbra, Dept Quim, Fac Ciencia & Tecnol, P-3004535 Coimbra, Portugal

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2020年 / 163卷

关键词：

Calcium acetate; Supercritical antisolvent precipitation; Eggshells micronization; Supercritical CO2; OXIDE; MICRONIZATION; NANOPARTICLES; PARTICLES; WASTE;

D O I：

10.1016/j.supflu.2020.104862

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The search for sustainable resources remains a matter of global interest. The presence of calcium in food waste may be a material to be valued. In this paper we show a new way of precipitating calcium acetate, produced from eggshells, using the supercritical antisolvent technique (SAS). It also presents the study of the precipitation efficiency as a function of the experimental conditions that affect the SAS results temperature, pressure, liquid solution concentration and injection flow. It was possible to obtain good results under almost all experimental conditions, highlighting a higher yield for 200 bar pressures and lower solution injection flows. The obtained particles have a rod-like appearance having different sizes depending on the operating conditions. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：6

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