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Firstly, a chemical model of n-heptane\/toluene is established, and the coupling, reduction, and simulation processes are carried out in chemical kinetic software with the IDT as the target parameter. Secondly, a constant volume combustion chamber (CVCC) visualization platform is built by incorporating a high-speed camera system and different working conditions are set in the CO2 volume fraction range (40%-70%) at 3.0\u2009MPa and 850\u2009K for an autoignition experiment. Thirdly, experiment and simulation results are discussed in air, 60% CO2\/40% O2, 50% CO2\/50% O2, and 40% CO2\/60% O2 atmospheres, including the IDT, CO2 effects, temperature sensitivity, and OH radical rate of production (ROP). The results show that the CDE model well predicts the 70% n-heptane\/30% toluene IDT under the CO2\/O2 atmosphere and the average error in 60% CO2\/40% O2 atmosphere is 5.29%. Besides, when the CO2 volume fraction increases from 40% to 60%, the CO2 thermal effect plays a leading role in the IDT prolongation and the OH radical ROP peak of R4 (O+H2O\u27f62OH) decreases by 180%.<\/jats:p>","DOI":"10.1155\/2022\/4334317","type":"journal-article","created":{"date-parts":[[2022,4,29]],"date-time":"2022-04-29T15:20:12Z","timestamp":1651245612000},"page":"1-17","source":"Crossref","is-referenced-by-count":0,"title":["Effects of High-Concentration CO2 on Ignition Delay Time of 70% n-Heptane\/30% Toluene Mixtures"],"prefix":"10.1155","volume":"2022","author":[{"given":"Shengzhuo","family":"Yao","sequence":"first","affiliation":[{"name":"Beijing Engineering Research Center of Monitoring for Construction Safety, Beijing University of Civil Engineering and Architecture, Beijing 100044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuewei","family":"Zhang","sequence":"additional","affiliation":[{"name":"Beijing Engineering Research Center of Monitoring for Construction Safety, Beijing University of Civil Engineering and Architecture, Beijing 100044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7610-7707","authenticated-orcid":true,"given":"Yongfeng","family":"Liu","sequence":"additional","affiliation":[{"name":"Beijing Engineering Research Center of Monitoring for Construction Safety, Beijing University of Civil Engineering and Architecture, Beijing 100044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3931-4301","authenticated-orcid":true,"given":"Guijun","family":"Bi","sequence":"additional","affiliation":[{"name":"Singapore Institute of Manufacturing Technology (SIMTech), 73 Nanyang Drive, 637662, Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lu","family":"Zhang","sequence":"additional","affiliation":[{"name":"Beijing Engineering Research Center of Monitoring for Construction Safety, Beijing University of Civil Engineering and Architecture, Beijing 100044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ping","family":"Wei","sequence":"additional","affiliation":[{"name":"School of Civil Engineering and Survey, Beijing Polytechnic College, Beijing 100042, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jinou","family":"Song","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hua","family":"Sun","sequence":"additional","affiliation":[{"name":"School of Humanities, Beijing University of Civil Engineering and Architecture, Beijing 100044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"doi-asserted-by":"publisher","key":"1","DOI":"10.1016\/j.enpol.2019.111006"},{"doi-asserted-by":"publisher","key":"2","DOI":"10.1038\/s41893-019-0323-1"},{"doi-asserted-by":"publisher","key":"3","DOI":"10.1016\/j.jobe.2020.101714"},{"author":"P. 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