The paper presents a techno-economic comparison among five alternative process configurations for bio-methanol production from the gasification of residual forestry biomass. Process design and simulations are performed in Aspen Plus for mass and energy balance calculation, followed by preliminary sizing and economic analysis. Process schemes include a gasification island (state-of-the-art low-pressure gasification compared against a high-pressure gasifier) with syngas conditioning and compression, heat recovery, syngas composition adjustment (by CO capture or addition of hydrogen produced by electrolysis), methanol synthesis and purification and a heat recovery cycle for power generation. CO capture is performed with conventional chemical absorption in the benchmark cases, while low-temperature partial condensation of CO is modeled in the advanced scenario. Methanol output is 14–15 kt/y in the CO capture cases and 36 kt/y in the H addition option.

中文翻译：

---

剩余林业生物质气化产生负二氧化碳排放的生物甲醇：不同工艺配置的建模和技术经济评估


本文对剩余林业生物质气化生产生物甲醇的五种替代工艺配置进行了技术经济比较。在 Aspen Plus 中进行工艺设计和模拟，以进行质量和能量平衡计算，然后进行初步规模确定和经济分析。工艺方案包括气化岛（与高压气化炉相比，是最先进的低压气化），具有合成气调节和压缩、热回收、合成气成分调整（通过捕获二氧化碳或添加电解产生的氢气） 、甲醇合成和纯化以及用于发电的热回收循环。在基准案例中，二氧化碳捕集采用传统的化学吸收法进行，而在高级场景中则对二氧化碳的低温部分冷凝进行建模。在 CO 捕获情况下，甲醇产量为 14–15 kt/y，在 H 添加选项中，甲醇产量为 36 kt/y。