CAS Number: 7446-11-9
Sulfur trioxide
Sulfur trioxide is a chemical compound that has potential applications in different fields. One of its main uses is in the production of sulfuric acid, which is one of the most widely used industrial chemicals. Sulfur trioxide is reacted with water to produce sulfuric acid, which has applications in different industries such as fertilizers, detergents, and batteries. In addition to its use in the production of sulfuric acid, Sulfur trioxide can also be used as a catalyst in different chemical reactions. It is known for its ability to promote various chemical reactions such as the conversion of alcohols to aldehydes and the synthesis of different types of esters. Furthermore, it can be used as a dehydrating agent in the production of different chemicals such as nitrates and phosphates.
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References
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A review on sulfur trioxide (SO3) removal from coal combustion process: Research progress challenges and suggestions
This review article by Lian, Kong, Wang, and Liu provides a comprehensive overview of sulfur trioxide (SO?) removal technologies from coal combustion processes, addressing the growing environmental and health concerns associated with excessive SO? emissions, which can form colored smoke, cause equipment corrosion and blockage, and harm human health. The paper categorizes SO? control strategies into source control (e.g., regulating fuel, combustion conditions, and optimizing selective catalytic reduction (SCR) catalysts to reduce catalytic conversion of SO? to SO?), collaborative control using existing air pollution control devices such as dust collectors, wet flue gas desulfurization (WFGD), and wet electrostatic precipitators (WESP)—with WESP achieving up to 90% removal efficiency—and alkaline adsorbent injection (e.g., calcium-, magnesium-, or sodium-based adsorbents), which can achieve over 90% removal efficiency by optimizing the adsorbent-to-SO? molar ratio. The authors also compare the applicability and limitations of each technology, highlight challenges such as adverse effects on combustion processes and high operational costs, and provide research suggestions for future development, making this review a valuable reference for designing and advancing SO? control technologies in coal-fired power plants.
DOI: 10.1016/j.seppur.2024.130190