Abstract
Technologies for the management of various types of waste and the production of useful products from them are currently widely studied. Both carbon dioxide and calcium-rich waste from various production processes are problematic wastes that can be used to produce calcium carbonate. Therefore, the purpose of this paper is to provide an overview about the state of the development of processes that use these two wastes to obtain a valuable CaCO3 powder. The paper reviews the current research on the use of post-distillation liquid from the Solvay process, steelmaking slag, concrete, cement, and gypsum waste as well as some others industrial Ca-rich waste streams in the calcium carbonate precipitation process via carbonation route. This work is an attempt to collect the available information on the possibility of influencing the characteristics of the obtained calcium carbonate. It also indicates the possible limitations and implementation problems of the proposed technologies.
Highlights
Carbon dioxide is the main anthropogenic greenhouse gas [1]
Despite this fact, the projected global coal production continues to increase by around 3%, and the global carbon-related CO2 emissions from the energy sector will increase by 0.1% annually between 2015 and 2040 [4]
This paper presents the current state of knowledge regarding the reuse of waste gaseous CO2 and selected Ca-rich waste in the calcium carbonate precipitation process
Summary
The rapid economic growth resulted in an increase in energy demand and, an increase in the consumption of fuels, in particular fossil fuels such as oil, coal, and natural gas [2,3]. During their combustion, large amounts of CO2 are emitted into the atmosphere, which has an adverse effect on the environment and is the cause of global warming. Post-combustion technology is the simplest to implement and is mainly based on chemical absorption [9,13,14] This option is usually used as a modification to existing power plants. Due to the low CO2 content in flue gases (4% in the case of natural gas combustion, 7–14% in the case of coal combustion), it is relatively expensive to obtain a gas stream
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