The first investigation of La-promoted Co/Al₂O₃ catalysts in Ethylene Glycol-CO₂ conversion (EGCC) for syngas (H₂ + CO) production was conducted in this work. Co/Al₂O₃ catalysts modified with different La promoter loadings (1, 3, and 5%) were generated through sequential incipient wetness impregnation technique and employed for EGCC. The physicochemical attributes of the generated catalysts were examined via Brunauer-Emmett-Teller (BET), H₂ temperature-programmed reduction (H₂-TPR), X-ray diffraction (XRD), Raman, and temperature-programmed oxidation (TPO). 3%La-promoted catalyst owned the largest specific surface area, smallest Co crystallite size of 9.8 nm, and lowest reduction temperature among the promoted catalysts. These excellent properties resulted in the highest catalytic performance on the 3%La-promoted catalyst (i.e., C₂H₆O₂ conversion = 77.6 %, CO₂ conversion = 43.1 %, H₂ yield = 75.3 %, and CO yield = 76.8 %). The significant reduction in carbon deposition of the 3%La-promoted catalyst was due to the La capability in eliminating deposited carbon via the formation of intermediate lanthanum dioxycarbonate, La₂O₂CO₃.

在这项工作中，进行了La促进的Co / Al ₂ O ₃催化剂在乙二醇-CO ₂转化（EGCC）中用于合成气（H ₂ + CO）生产的首次研究。通过顺序初湿浸渍技术制备了以不同的La助催化剂负载量（1、3和5％）改性的Co / Al ₂ O ₃催化剂，并将其用于EGCC。通过Brunauer-Emmett-Teller（BET），H _2程序升温还原（H ₂-TPR），X射线衍射（XRD），拉曼和程序升温氧化（TPO）。3％La促进的催化剂具有最大的比表面积，最小的9.8 nm Co晶粒尺寸和最低的还原温度。这些优异的性能导致在3％La促进的催化剂上具有最高的催化性能（即C ₂ H ₆ O ₂转化率= 77.6％，CO ₂转化率= 43.1％，H ₂产率= 75.3％和CO产率= 76.8 ％）。3％La促进的催化剂的碳沉积显着减少是由于La具有通过形成中间氧合碳酸镧La ₂ O ₂ CO消除沉积碳的能力₃。