Upgrading CO₂/CH₄ enriched biogas effluents, especially from landfills, is a viable route towards simultaneously generating renewable methane for energy production and purified carbon dioxide for industries like oil and gas, whose main use is enhanced oil recovery. Pelletized basic immobilized amine sorbents (BIAS) previously utilized for post-combustion CO₂ capture are prime candidates for CO₂ removal from landfill gas (inherent CH₄ enrichment) because of the pellets' high CO₂ selectivity and tunability for optimized performance at different temperatures and gas compositions. This work examines the process parameters and material properties that are key in the production scale-up of our previously developed polychloroprene latex-polyethylenimine (PEI, MW = 25,000) binder/silica-fly ash pellet supports. Thicker pastes with aqueous binder solution/powder ratios between 2.9/1 and 3.24/1 exhibited average storage moduli of G' ≥ 9.5 × 10⁶ ± 1.2 × 10⁵ Pa and were easily prepared then transformed into separable cylindrical ropes via a lab-scale mixer-extruder machine. The dried supports displayed good crush strength and a > 98% efficient amine impregnation. Pellets containing 32 wt% PEI₈₀₀/N-N-diglycidyl-4-glycidyloxyaniline crosslinker (1/0.13 wt. ratio) showed a high 1.95 mmol CO₂/g capture from simulated landfill gas (60% CO₂/39% CH₄/1% O₂) at 75 °C that dropped <30% after 24 h at 105 °C under the same gas environment. Scalability of the material was demonstrated by producing a 3.3 kg batch of pellet supports with pilot-scale mixer and extruder equipment. Similar strength and CO₂ capture performance for the PEI-functionalized commercial pellets as those for the lab-scale pellets strongly indicate the viability of these materials for pilot-scale landfill gas CO₂ capture/upgrading.

升级富含CO ₂ /CH _{4 的}沼气流出物，尤其是来自垃圾填埋场的沼气流出物，是同时产生用于能源生产的可再生甲烷和用于石油和天然气等行业的纯化二氧化碳的可行途径，其主要用途是提高石油采收率。以前用于燃烧后 CO ₂捕获的球团碱性固定胺吸附剂 (BIAS)是从垃圾填埋气中去除CO _{2 的}主要候选物（固有的 CH ₄富集），因为球团具有高 CO ₂在不同温度和气体成分下优化性能的选择性和可调性。这项工作检查了对我们之前开发的聚氯丁二烯乳胶-聚乙烯亚胺（PEI，MW = 25,000）粘合剂/二氧化硅-飞灰颗粒载体的生产放大至关重要的工艺参数和材料特性。粘合剂水溶液/粉末比在 2.9/1 和 3.24/1 之间的较稠糊表现出 G' ≥ 9.5 × 10 ⁶  ± 1.2 × 10 ⁵ Pa 的平均储能模量，并且很容易制备，然后通过实验室规模转化为可分离的圆柱绳混合挤出机。干燥的载体显示出良好的抗碎强度和 > 98% 的有效胺浸渍。含有 32 wt% PEI _{800 的}颗粒/NN-二缩水甘油基-4-缩水甘油氧基苯胺交联剂（1/0.13 重量比）在 75° 时显示出从模拟垃圾填埋气（60% CO ₂ /39% CH ₄ /1% O ₂）中捕获的高 1.95 mmol CO ₂ /g在相同的气体环境下，在 105 °C 下 24 小时后 C 下降 <30%。该材料的可扩展性通过使用中试混合器和挤出机设备生产 3.3 kg 批次的颗粒载体来证明。PEI 功能化商业颗粒的强度和 CO ₂捕获性能与实验室规模的颗粒相似，强烈表明这些材料在中试规模垃圾填埋气 CO ₂捕获/升级方面的可行性。