Advances in CO2 Conversion and Utilization by Yun Hang Hu

By Yun Hang Hu

content material: CONTENTS; PREFACE; 1. SYNTHESIS AND CHARACTERIZATION OF FERRITE fabrics FOR THERMOCHEMICAL CO2 SPLITTING utilizing targeted solar power; ANDREA AMBROSINI, ERIC N. COKER, MARK A. RODRIGUEZ, STEPHANIE LIVERS, LINDSEY R. EVANS, JAMES E. MILLER, AND ELLEN B. STECHEL; 2. PHOTOCATALYTIC aid OF CO2 utilizing H2 AS REDUCTANT OVER sturdy BASE PHOTOCATALYSTS; KENTARO TERAMURA AND TSUNEHIRO TANAKA; three. CO2 SPLITTING through THE sunlight THERMOCHEMICAL CYCLE in accordance with ZN/ZNO REDOX REACTIONS; PETER G. LOUTZENHISER, ANTON MEIER, DANIEL GSTOEHL, AND ALDO STEINFELD; four. HYDROTHERMAL CONVERSION OF CO2 INTO VALUE-ADDED items: a possible expertise for making improvements to worldwide CARBON CYCLE; FANGMING JIN, ZHIBAO HUO, XU ZENG, AND HEIJI ENOMOTO; five. ELECTROCATALYTIC aid OF CO2 TO SMALL natural MOLECULE FUELS ON steel CATALYSTS; WENZHEN LI; 6. CO2 CHEMISTRY AT NANKAI crew: CATALYTIC CONVERSION OF CO2 INTO VALUE-ADDED chemical compounds; LIANG-NIAN HE, ZHEN-ZHEN YANG, AN-HUA LIU, AND JIAN GAO; 7. OXIDATIVE DEHYDROGENATION OF ETHANE TO AND

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30% dissociation is theoretically obtained above 2700 K. Further complications arise from the need to separate the product gases at these high temperatures in order to avoid recombination upon cooling. The operating temperature can be reduced and the separation problem bypassed by making use of thermochemical cycles. ; ACS Symposium Series; American Chemical Society: Washington, DC, 2010. ch003 dissociation of ZnO(s) and 2) the non-solar exothermal reduction of CO2 with Zn into CO and ZnO(s), and represented by: The net reaction is CO2 → CO + ½ O2, with products formed in different steps, thereby eliminating the need for their high-temperature separation.

It features a rotating cavity-receiver lined with ZnO particles that are directly exposed to concentrated solar radiation and serve simultaneously the functions of radiant absorbers and chemical reactants. A transient heat transfer model was developed for analyzing the reactor thermal performance (19). This model couples radiation, convection, and conduction heat transfer to the reaction kinetics for a shrinking domain and simulates a transient ablation regime with semi-continuous feed cycles of ZnO particles.

ACS Symposium Series; American Chemical Society: Washington, DC, 2010. ch003 Chapter 3 CO2 Splitting via the Solar Thermochemical Cycle Based on Zn/ZnO Redox Reactions Peter G. ch A two-step thermochemical cycle for splitting CO2 and processing into solar fuels via ZnO/Zn redox reactions is considered. The first, solar step is the endothermic dissociation of ZnO to Zn and O2. The second, non-solar step is the exothermic reduction of CO2 with Zn to CO and ZnO; the latter is recycled to the solar step.

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