globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.jcou.2016.11.012
Scopus ID: 2-s2.0-85003881270
Process simulation of mineral carbonation of phosphogypsum with ammonia under increased CO2 pressure
Author: Bao W.; Zhao H.; Li H.; Li S.; Lin W.
Source Publication: Journal of CO2 Utilization
ISSN: 22129820
Publishing Year: 2017
Volume: 17
pages begin: 125
pages end: 136
Language: 英语
Keyword: Ammonia ; Carbon dioxide ; Mineral carbonation ; Phosphogypsum ; Process simulation
Scopus Keyword: Ammonia ; Carbon ; Carbon dioxide ; Computer software ; Energy utilization ; Fertilizers ; Gypsum ; Minerals ; Reaction kinetics ; Reaction rates ; Sensitivity analysis ; Water absorption ; Aspen plus process simulations ; Fertilizer production ; Large-scale applications ; Low energy consumption ; Mineral carbonation ; Phosphogypsum ; Process simulations ; Value-added chemicals ; Carbonation
English Abstract: The mineral carbonation of phosphogypsum offers many advantages in sequestering CO2, solving the pollution problem of phosphogypsum stacking, and manufacturing high value-added chemical products with low energy consumption and cost. Using the Aspen Plus process simulation software, this work simulates a novel process for the mineral carbonation of phosphogypsum with ammonia under increased CO2 pressure. This process is divided into five sections, namely, pre-carbonation, enhanced carbonation, flash separation, gas phase absorption, and (NH4)2SO4 fertilizer production. With its large-scale application, this new process allows the sensitivity analysis of many operation conditions, identifies the optimal conditions for reducing the ammonia and energy consumption of (NH4)2SO4 fertilizer production, and achieves a high carbonation conversion with a fast reaction rate. The optimal conditions (6 bar enhanced carbonation pressure, 1 bar flash pressure, 38 °C ammonia absorption solution temperature, 1.05 ammonia excess ratio, 1.024 CO2 excess ratio, and 0.94 mass ratio of water to gypsum) yield the highest carbonation conversion, ammonia utilization ratio, and enhanced carbonation temperature of 99.9%, 95.2%, and 138.5 °C, respectively, all of which can help achieve a fast carbonation reaction rate. © 2016 Elsevier Ltd. All rights reserved.
Funding Project: National Natural Science Foundation of China
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Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Bao W.,Zhao H.,Li H.,et al. Process simulation of mineral carbonation of phosphogypsum with ammonia under increased CO2 pressure[J]. Journal of CO2 Utilization,2017-01-01,17
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