https://pubs.acs.org/doi/10.1021/jacs.1c10153
Photochemistry of HOSO2 and SO3 and Implications for the Production of Sulfuric Acid Javier Carmona-García, Tarek Trabelsi, Antonio Francés-Monerris, Carlos A. Cuevas, Alfonso Saiz-Lopez, Daniel Roca-Sanjuán, and Joseph S. Francisco *Abstract* Sulfur trioxide (SO3) and the hydroxysulfonyl radical (HOSO2) are two key intermediates in the production of sulfuric acid (H2SO4) on Earth’s atmosphere, one of the major components of acid rain. Here, the photochemical properties of these species are determined by means of high-level quantum chemical methodologies, and the potential impact of their light-induced reactivity is assessed within the context of the conventional acid rain generation mechanism. Results reveal that the photodissociation of HOSO2 occurs primarily in the stratosphere through the ejection of hydroxyl radicals (•OH) and sulfur dioxide (SO2). This may decrease the production rate of H2SO4 in atmospheric regions with low O2 concentration. In contrast, the photostability of SO3 under stratospheric conditions suggests that its removal efficiency, still poorly understood, is key to assess the H2SO4 formation in the upper atmosphere. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/geoengineering/CAKSzgpZOuNevsCieR4TO_TR6eL4reyYDmGFbORy%2Bn00CTup_LA%40mail.gmail.com.
