CARBON DIOXIDE CAPTURE AND CONVERSION METHODS AND SYSTEMS

문헌번호

EP 3484817 A1 (2019.05.22)

출원번호

2017-742510 (2017.07.12)

출원인

The University Court of The University of Aberdeen

발명자

IMBABI, Mohammed Salah-Eldin | GLASSER, Fredrik

Current IPC

(Main)

C01B-032/60

우선권번호

GB 2016012102 (2016.07.12)

요약

The present invention provides a method of mineralisation of carbon dioxide. The method comprises forming an alkaline aqueous solution containing carbonate anions by dissolving the carbon dioxide and an alkali such as ammonia in water. Next, the method comprises mixing the alkaline aqueous solution with a water source (such as a connate/formation brine or produced water or industrial waste waters or re-constituted mineral-bearing waters) containing magnesium and calcium cations. A first product (e.g. PCC) containing calcium cations and carbonate anions is precipitated in a first precipitation step at a first pH (e.g. around pH7.5) and then a second product (e.g. nesquehonite (NQ) a type of PMC) containing magnesium cations and carbonate anions is precipitated in a second precipitation step at a second, higher pH e.g. around pH 9.5.

대표청구항

1. A method of mineralisation of carbon dioxide, the method comprising:forming an alkaline aqueous solution containing carbonate anions by dissolving the carbon dioxide and an alkali in water;mixing the alkaline aqueous solution with a water source containing magnesium and calcium cations;selectively precipitating a first product containing calcium cations and carbonate anions in a first precipitation step at a first pH; andthen selectively precipitating a second product containing magnesium cations and carbonate anions in a second precipitation step at a second pH, wherein the second pH is higher than the first pH.

WIPS 패밀리

EP3484817A1 | GB2016012102 | WOWO2018-011567A1