کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6528366 | 1419835 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Conceptual design of a CO2 capture and utilisation process based on calcium and magnesium rich brines
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Carbon capture and utilisation processes, CCU, are those processes aiming to produce usable products from CO2-based materials. Although there are a large number of CCU alternatives, only a few are able to propose routes for the massive production of marketable CO2 based products with a negative or neutral carbon footprint in the long term. In this work, a conceptual design of a process aimed to produce a cementitious construction material, based on magnesium carbonate trihydrate, also known as nesquehonite, is discussed and experimentally tested. Desalination brines are proposed as the source of aqueous magnesium. However, these brines contain a non-negligible amount of calcium, which interferes in the development of cementitious properties from nesquehonite. In order to avoid this interference, a multi-stage precipitation is proposed, where calcium carbonate precipitates in a first stage, and pure nesquehonite can be obtained in a second stage. A thermodynamic model, based on empirical observations from the precipitation system, is proposed and the technical feasibility of three process alternatives are evaluated against the outcomes from the model. The preferred alternative, from the technical and economic point of view, is to conduct a full absorption of CO2 as aqueous carbonate, which is then split in two streams for both precipitation stages. The advantage of this alternative is the applicability to different types of brines, the probably faster and more economic absorption stage, and the easier control of the reaction conditions, as pH and temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of CO2 Utilization - Volume 27, October 2018, Pages 161-169
Journal: Journal of CO2 Utilization - Volume 27, October 2018, Pages 161-169
نویسندگان
Jose-Luis Galvez-Martos, Ammar Elhoweris, Jennie Morrison, Yousef Al-horr,