[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-199395-105":59,"doc-detail-199395-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","a-model-study-of-formaldehyde-formation-under-reducing-conditions","A Model Study of Formaldehyde formation Under Reducing Conditions","","Formaldehyde (HCHO) serves as an important precursor for atmospheric organic molecule formation on early Earth and may have been produced by photochemical reactions. This study examines atmospheric formation of HCHO in the Archean under reducing conditions using a 1D photochemical model. PATMO includes 56 chemical species and 412 reactions, simulating the atmosphere from the surface to 100 km across 100 years while accounting for solar attenuation and photodissociation rates. Photochemical HCHO concentrations are estimated at 0.0002–0.017 ppm, with a maximum near 61 km altitude linked to peak H2O levels in the Archean atmosphere.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/a-model-study-of-formaldehyde-formation-under-reducing-conditions/199395/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/a-model-study-of-formaldehyde-formation-under-reducing-conditions/199395.png","ImageObject",300,407,{"name":92,"@type":93},"Himbo","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-17","2026-09-04",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",12,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What is the purpose of the study on formaldehyde formation?","Question",{"text":113,"@type":114},"The study investigates how formaldehyde (HCHO) could form in the Archean atmosphere under reducing conditions using a 1D photochemical model.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What model is used to simulate the Archean atmosphere?",{"text":118,"@type":114},"The PATMO model is used, containing 56 chemical species and 412 chemical reactions that simulate atmospheric conditions from the surface to 100 km over 100 years.",{"name":120,"@type":111,"acceptedAnswer":121},"What concentration range of photochemical HCHO is found, and where is the maximum located?",{"text":122,"@type":114},"Photochemical HCHO concentrations range from 0.0002 to 0.017 ppm, with the maximum occurring at about 61 km altitude, corresponding to peak H2O levels.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},199395,1788505861,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":8,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":130,"read_time":81,"preview_page_count":4},687197100911,"https://ap-avatar.wpscdn.com/avatar/a000239b6f1da00475?x-image-process=image/resize,m_fixed,w_180,h_180&k=1785132997149421697","PR 0149  \nA Model Study of Formaldehyde formation Under Reducing Conditions  \n*Tran Thi Ngoc Trieu 1 , Fuyutsuki Seba 1（ 1Faculty of Science and Technology, Sophia University)  \nFormaldehyde (HCHO) was a significant precursor for forming atmospheric organic molecules in the early Earth. And HCHO could have been produced by photochemical reactions [1] . Besides, the atmosphere in the Archean era was reducing with less sunlight intensity than the present atmosphere. To understand the evolution of our Earth, in this study, we investigated the atmospheric formation of HCHO in the Archean using a 1D photochemical model. The model named PATMO[2] consists of 56 chemical species and 412 chemical reactions which simulated the atmosphere from surface to 100 km in 100 years. This model considered the attenuation of sunlight and the photodissociation reaction rate over time which helps estimate the photochemical HCHO concentration in the Archean. The results show that photochemical HCHO in Archean atmosphere ranging from 0.0002 to 0.017 ppm. The maximum HCHO concentration occurred at an altitude of 61 km corresponding to the maximum level of H2O in the Archean atmosphere.  \nReferences  \n[1] Pinto et al., Science 210,183-185(1980) . DOI:10.1126/science.210.4466.183 .  \n[2] Danielache et al., Geochemical journal 57-2, 42-58 (2023). DOI:10.2343/geochemj.GJ23004 .","cbCaibe9fYBy8Rps","https://ap.wps.com/l/cbCaibe9fYBy8Rps","pdf",111306,"English","# Introduction\n## Modeling approach\n## Results and implications\n# References","[{\"question\":\"What is the purpose of the study on formaldehyde formation?\",\"answer\":\"The study investigates how formaldehyde (HCHO) could form in the Archean atmosphere under reducing conditions using a 1D photochemical model.\"},{\"question\":\"What model is used to simulate the Archean atmosphere?\",\"answer\":\"The PATMO model is used, containing 56 chemical species and 412 chemical reactions that simulate atmospheric conditions from the surface to 100 km over 100 years.\"},{\"question\":\"What concentration range of photochemical HCHO is found, and where is the maximum located?\",\"answer\":\"Photochemical HCHO concentrations range from 0.0002 to 0.017 ppm, with the maximum occurring at about 61 km altitude, corresponding to peak H2O levels.\"}]","A Model Study of Formaldehyde formation Under Reducing Conditions | PDF"]