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Synthesis of tetrahedrally coordinated coo for higher alcohol synthesis directly from syngas

Frontiers of Chemical Science and Engineering 2024年第8期18卷 99-109页

作者： Zhuoshi Li Han Yang Xiaofeng Pei Jiahui Li Jing Lv Shouying Huang Yue Wang Xinbin Ma Key Laboratory for Green Chemical Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Higher alcohol synthesis directly from syngas is highly desirable as one of the efficient non-petroleum energy conversion ***0–Co^(O)catalysts showed great potential for this reaction,but the alcohol selectivity still needs to be improved and the crystal structure effect of Co^(O)on catalytic behaviors lacks ***,a series of tetrahedrally coordinated Co^(O)polymorphs were prepared by a thermal decomposition method,which consisted of wurtzite coo and zinc blende coo with varied *** diluting with SiO_(2),the catalyst showed excellent performance for higher alcohol synthesis with ROH selectivity of 45.8%and higher alcohol distribution of 84.1 wt%under the CO conversion of 38.0%.With increasing the content of wurtzite coo,the Co^(0)/Co^(2+)ratio gradually increased in the spent catalysts,while the proportion of highly active hexagonal close packed cobalt in Co^(0)decreased,leading to first decreased then increased CO ***,the higher content of zinc blende coo in fresh catalyst facilitated the retention of more Co^(2+)sites in spent catalysts,promoting the ROH selectivity but slightly decreasing the distribution of higher *** catalyst with 40%wurtzite coo obtained the optimal performance with a space time yield toward higher alcohols of 7.9 mmol·gcat^(-1)·h^(-1).

关键词： higher alcohol synthesis CO hydrogenation wurtzite coo zinc blende coo hexagonal-closest-packed Co

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