To develop a solution for clean gas supply and biomass utilization and indirect renewable power storage, this work proposes a novel SNG process integrating O₂-enriched air gasification with O₂ purity range of 80–96%. Low-cost vacuum pressure swing adsorption (VPSA) is integrated to produce O₂ with purities of 80% and 90%; while cryogenic air separation (CAS) is applied for 96% O₂ purity. Besides SNG, the syngas of the methanation product without CO₂ separation (SG) is considered as a new type of safe fuel for rural areas. The technical and economic assessments are successively performed based on simulation data. The effects of important operating variables on technical performances are investigated to determine the optimal values. The overall energy and exergy efficiencies of SG reach 68.37% and 62.59%, respectively, while those of SNG achieve 65.69% and 60.38%, respectively. The equivalent unit product costs of SG and SNG are 1.661 ¥/Nm³ and 2.031 ¥/Nm³ at base scenario, respectively, which are quite profitable. The sensitivity analysis of the cost indicates that the products has strong cost competitiveness within the actual fluctuations, and the constraints for SG is much looser than that for SNG to gain profit. The process integrating VPSA has obvious advantages in efficiencies and unit production cost, which come with the price of visible disadvantages in CH₄ concentration and higher heating value (HHV). The work is a representative reference for the countries lacking natural gas and valuable to guide the development of O₂-enrich air gasifier, process optimization and indirect renewable power storage.

开发用于清洁气体的供应和生物质利用和间接再生功率存储的溶液中，这项工作提出了一种新颖SNG方法O积分₂富集的空气气化带O ₂纯度范围的80-96％。集成低成本真空变压吸附（VPSA），生产纯度为80%和90%的O ₂；而低温空气分离 (CAS) 则适用于 96% 的 O ₂纯度。除 SNG 外，不含 CO ₂的甲烷化产物的合成气分离（SG）被认为是一种新型的农村安全燃料。技术和经济评估是根据模拟数据依次进行的。研究重要操作变量对技术性能的影响以确定最佳值。SG 的整体能效和火用效率分别达到 68.37% 和 62.59%，而 SNG 分别达到 65.69% 和 60.38%。SG 和 SNG 的等效单位产品成本为 1.661 ¥/Nm ³和 2.031 ¥/Nm ³在基本情况下，分别是非常有利可图的。成本敏感性分析表明，产品在实际波动范围内具有较强的成本竞争力，SG的盈利约束比SNG宽松得多。集成VPSA的工艺在效率和单位生产成本方面具有明显优势，但伴随着CH ₄浓度和较高热值( HHV )等明显劣势的代价。该工作对缺乏天然气的国家具有代表性参考，对指导富O ₂空气气化炉的发展、工艺优化和间接可再生能源存储具有重要意义。