用高纯度和高白度磷石膏制备石膏用于 CO2 矿化封存。

Preparation of gypsum with high purity and whiteness from phosphogypsum for CO mineral sequestration.

机构信息

School of Chemical Safety, North China Institute of Science and Technology, Langfang, 065201, China.

出版信息

Sci Rep. 2023 Mar 13;13(1):4156. doi: 10.1038/s41598-023-28251-6.

DOI:10.1038/s41598-023-28251-6

PMID:36914695

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10011531/

Abstract

Phosphogypsum (PG) is a solid waste product generated during wet-process phosphoric acid production. Various impurities considerably reduce the purity, whiteness, and application range of PG. This article analyzes the physical properties of PG in detail and systematically examines the content and distribution of impurities. Based on the obtained results, a simple process for the efficient removal of almost all impurities in the PG is proposed. The purity and whiteness of the purified gypsum (CaSO) significantly increased to 99% and 92%, respectively. The migration of impurities and the material balance of this process were then analyzed. Most importantly, the purified gypsum showed high CO sequestration efficiency for CO mineral sequestration, through which a high value-added CaCO product was obtained.

摘要

磷石膏（PG）是湿法磷酸生产过程中产生的一种固体废弃物。各种杂质大大降低了 PG 的纯度、白度和应用范围。本文详细分析了 PG 的物理性质，并系统地研究了杂质的含量和分布。基于所得结果，提出了一种简单的工艺，可有效去除 PG 中的几乎所有杂质。提纯石膏（CaSO）的纯度和白度分别显著提高到 99%和 92%。然后分析了杂质的迁移和该过程的物料平衡。最重要的是，提纯石膏对 CO 矿化具有高的 CO 捕集效率，通过该方法得到了高附加值的 CaCO 产品。