Integrated carbon capture-utilization provides a viable approach to curb anthropogenic CO₂ emissions and, at the same time, produce valuable chemicals and fuels from a waste carbon feedstock. Herein, we report in-situ capture and utilization of CO₂ in ethylene production through oxidative dehydrogenation of ethane over adsorbent-catalyst materials consisting of double salt K-Ca and Cr-impregnated H-ZSM-5. The adsorption step was conducted at 600 °C using 10 % CO₂/Ar, followed by the reaction step at 700 °C using 5 % C₂H₆/Ar. An adsorption capacity of 5.2 mmol/g was obtained for K-Ca at 600 °C. The effects of Cr content, C₂H₆ feed concentration and weight hourly space velocity (WHSV) were investigated to determine the optimum process conditions for this combined process. Under 5000 mL/g h and 5 vol% C₂H₆ feed concentration, Cr₁₀/HZSM-5 physically-mixed with K-Ca (weight ratio of 1:1) exhibited the highest ethane conversion at 25 % with ethylene selectivity of 88 %, owing to its higher turnover frequency (TOF) number and lower Cr surface density.

集成的碳捕集利用提供了一种抑制人为CO ₂排放的可行方法，同时还可以从废碳原料生产有价值的化学物质和燃料。本文中，我们报告了在由复盐K-Ca和Cr浸渍的H-ZSM-5组成的吸附剂-催化剂材料上，乙烷的氧化脱氢，从而在乙烯生产中就位捕获和利用CO ₂。吸附步骤在600°C下使用10％CO ₂ / Ar进行，然后在700°C下使用5％C ₂ H ₆ / Ar进行反应。在600°C下，K-Ca的吸附容量为5.2 mmol / g。Cr含量，C ₂ H _6的影响研究了饲料浓度和重时空速（WHSV），以确定该联合工艺的最佳工艺条件。在5000 mL / g h和5vol％C ₂ H ₆进料浓度下，与K-Ca物理混合的Cr ₁₀ / HZSM-5（重量比为1：1）在25％时表现出最高的乙烷转化率，乙烯选择性为88 ％，由于其较高的周转频率（TOF）数和较低的Cr表面密度。