This work presents a numerical investigation into CO₂ valorization via the gasification of poplar wood. It is aimed at determining an optimum gasification condition for enhancing the production of syngas with a flexible H₂ to CO molar ratio (H₂/CO), which is essential in many petrochemical processes. The research is performed by simulation in ASPEN Plus, where steam and CO₂ are fed as co-gasifying agents. The equilibrium concentrations of the product gas are obtained, and the H₂/CO as well as the heating value of the resulting syngas are quantified. It is found that the inclusion of CO₂ as a co-gasifying agent promotes CO evolution through the Boudouard reaction. However, it reduces H₂ concentration, and consequently decreases the H₂/CO. Furthermore, the effects of some process parameters have been studied in this work. It is observed that H₂/CO reduces with a rise in temperature, increases with increasing CO₂ to biomass ratio (CBR), and shows no significant change with pressure. Results further show that methanol synthesis from syngas can be achieved at temperatures close to 660 °C, while oxo-synthesis requires a higher temperature. A CBR of around 0.6 in the present work would be an optimum value for Fischer-Tropsch synthesis to achieve a H₂/CO of 2:1, but the CBR should be lower for processes requiring a lower H₂/CO like acetic acid formation and oxo-synthesis.

这项工作提出了通过杨木木材气化来CO ₂增值的数值研究。目的在于确定最佳的气化条件，以提高具有灵活的H ₂与CO摩尔比（H ₂ / CO）的合成气的生产，这在许多石化工艺中都是必不可少的。该研究是通过在ASPEN Plus中进行模拟进行的，其中蒸汽和CO ₂作为助气化剂供入。获得了产物气的平衡浓度，并且量化了H ₂ / CO以及所得合成气的热值。发现包含CO ₂作为一种共气化剂，可通过Boudouard反应促进一氧化碳的释放。但是，它降低了H ₂浓度，因此降低了H ₂ / CO。此外，在这项工作中已经研究了一些工艺参数的影响。观察到，H ₂ / CO随着温度升高而降低，随着CO ₂与生物质比（CBR）的增加而增加，并且没有显示出随压力的显着变化。结果进一步表明，可以在接近660°C的温度下从合成气中合成甲醇，而羰基合成需要更高的温度。在目前的工作中，大约0.6的CBR将是费-托合成获得H ₂的最佳值/ CO为2：1，但对于要求较低H ₂ / CO的过程（如乙酸形成和羰基合成），CBR应该较低。