CO2 sequestration characteristics in the cementitious material based on gangue backfilling mining method
|نوع نگارش مقاله||
scopus – master journals – JCR
۴٫۲۷۶ در سال ۲۰۲۰
۲۶ در سال ۲۰۲۱
۰٫۹۰۱ در سال ۲۰۲۰
|شاخص Quartile (چارک)||
Q1 در سال ۲۰۲۰
خرید محصول توسط کلیه کارت های شتاب امکان پذیر است و بلافاصله پس از خرید، لینک دانلود محصول در اختیار شما قرار خواهد گرفت و هر گونه فروش در سایت های دیگر قابل پیگیری خواهد بود.
فهرست مطالب مقاله:
The increasing anthropogenic CO2 emission and global warming has challenged the China and other countries to seek new and better ways to meet the world’s increasing need for energy while reducing greenhouse gas emissions. The overall proposition of this research is to develop a brand-new CO2 physical and chemical sequestration method by using solid waste of coal mining and cementitious material which are widely used for goaf backfilling in coal mining. This research developed a new testing system (con- stant temperature pressurized reaction chamber (CTPRC)) to study the effects of different initial param- eters on mineral carbonation such as different initial water-binder ratio, initial sample porosity and initial carbon dioxide pressure. The experimental results show that the CO2 consumption ratio is ۱۵%,
۱۰% and 7% higher with relatively high initial water-binder ratio, initial sample porosity and initial
CO2 pressure within 48 h. In addition, some physical and chemical evidence was found through the elec- tron microscope scanning and XRD test to further explain the above test results. This proposed research will provide critical parameters for optimizing CO2 sequestration capacity in this cementitious backfilling material with forming agent.
|بخشی از متن مقاله:|
In the process of burning fossil energy such as coal, a large num- ber of greenhouse gases such as carbon dioxide are inevitably emitted, and the coal energy industry contributes to the majority of carbon dioxide atmospheric emissions. Based on the under- standing of current climate change, reducing the emission of greenhouse gases on a global scale and thus reducing the global greenhouse effect is the most critical work in current climate change mitigation actions. Therefore, technologies to reduce greenhouse gas levels in the atmosphere are crucial to climate change mitigation actions.
At present, there are several methods to control carbon dioxide emissions : the first method is to reduce carbon dioxide emis- sions by improving the energy efficiency, but the promotion of this measure is limited by various factors such as technological devel- opment level and economic development. Therefore, the effect of reducing carbon dioxide emissions by solely by improving energy efficiency will be very limited in the future. The second approach is to create low-carbon energy sources. At present, low-carbon
energy that can be utilized by human beings includes water energy, wind energy, solar energy, hydrogen, geothermal energy and so on. However, these low-carbon energy sources have their limitations, so they will be unable to replace traditional fossil energy in the energy structure in the coming decades. The third method is to improve the technology of comprehensive utilization and treatment of carbon dioxide . That is, to recover and sepa- rate the carbon dioxide generated in the energy industry through physical, chemical and biological technologies and turn it into a valuable industrial resource. However, depending on the current level of technology, the amount of carbon dioxide that can be com- prehensively utilized is minimal. Compared with the enormous global carbon dioxide emissions, this method can only reduce car- bon dioxide emissions to a certain extent and cannot effectively reduce the total amount of carbon dioxide emitted into the atmo- sphere . The fourth method is exploited by the ocean to dispose of carbon dioxide. In principle, this method can store a large amount of carbon dioxide, but the process of ocean storage of car- bon dioxide is prolonged, and the factors affecting ocean storage of carbon dioxide are incredibly complex, and the current technology level cannot be achieved. The fifth method is to utilize under- ground space such as unrecoverable coal seams, abandoned mines, and abandoned oil (gas) fields to store carbon dioxide geologically
. Studies have shown that the global underground area available for storing carbon dioxide is about 7.0 ۱۰۷ square kilometers, can accommodate carbon dioxide is about 1.0 ۱۰۱۴–۲٫۰ ۱۰۱۴ tons . Moreover, the technical level required for the implementation of this storage method is not superior, the storage cost is low, and the implementation is relatively easy. Therefore, this method will be the most convenient and effective method to address carbon dioxide.
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