当前位置: X-MOL 学术J. CO2 Util. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Numerical investigation of CO2 valorization via the steam gasification of biomass for producing syngas with flexible H2 to CO ratio
Journal of CO2 Utilization ( IF 7.2 ) Pub Date : 2018-07-09 , DOI: 10.1016/j.jcou.2018.07.003
Shakirudeen A. Salaudeen , Bishnu Acharya , Mohammad Heidari , Precious Arku , Animesh Dutta

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.



中文翻译:

H 2 / CO比可变的生物质蒸汽气化制合成气CO 2增价的数值研究。

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。

更新日期:2018-07-09
down
wechat
bug