Assessment of poly(L‐lactide) as an environmentally benign CO2 capture and storage adsorbent,Journal of Applied Polymer Science

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Assessment of poly(L‐lactide) as an environmentally benign CO2 capture and storage adsorbent
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-07-02 , DOI: 10.1002/app.49587
Sara Stelitano _{1,

2} , Victor Lazzaroli ₁ , Giuseppe Conte ₁ , Valentino Pingitore ₁ , Alfonso Policicchio _{1,

3,

4} , Raffaele Giuseppe Agostino _{1,

3,

4}

Affiliation

Carbon capture and storage (CCS) in conjunction with an increasing use of renewables provides a clean pathway to sustainable development and climate change mitigation. In selecting a low temperature CCS adsorbent, parameters such as selectivity, regeneration energy, and economicity play a crucial role. Poly(L‐lactide) (PLA) is one of the most promising materials in science and engineering, not only because it is a green polymer progressively replacing petrobased plastics, but also for its carbon dioxide (CO₂)‐philic nature that makes it a suitable candidate for greenhouse gas capture and climate change mitigation. Literature data point to PLA as a valid CCS candidate, although no direct gaseous CO₂ adsorption investigation or with mild preparation/regenerative energy was reported. In the present experimental work, a deeper investigation of the adsorption/desorption properties of PLA in presence of gaseous CO₂ at room temperature was undertaken by means of a home‐made Sievert‐type apparatus. The effects of pressure (0–15 bar), morphology (commercial pellets, powder, and flakes), and regenerative energy (303 and 333 K) were investigated. PLA samples were also characterized by helium picnometry to obtain skeletal density and by XRD and SEM to obtain morphological and structural information. Results show that PLA represents a valid and ecological alternative among the materials for the capture of CO₂. The PLA absorption capacity reaches 16 wt% at 15 bar and 303 K, and is closely linked to the thermal treatment, morphology, and crystalline structure of the material.

中文翻译：

评估聚（L-丙交酯）作为环境友好的CO2捕获和储存吸附剂

碳捕集与封存（CCS）以及越来越多的可再生能源使用，为实现可持续发展和缓解气候变化提供了一条清洁之路。在选择低温CCS吸附剂时，诸如选择性，再生能量和经济性等参数起着至关重要的作用。聚（L-丙交酯）（PLA）是科学和工程学中最有前途的材料之一，不仅因为它是一种逐渐替代石油基塑料的绿色聚合物，而且还因为它具有二氧化碳（CO ₂）亲和性使其成为天然材料温室气体捕获和减缓气候变化的合适人选。文献数据指出，尽管没有直接气态CO ₂，PLA还是有效的CCS候选物报告了吸附研究或具有温和的制备/再生能量。在当前的实验工作中，利用自制的Sievert型设备对室温下气态CO ₂存在下PLA的吸附/解吸性能进行了更深入的研究。研究了压力（0-15 bar），形态（商业颗粒，粉末和薄片）和再生能量（303和333 K）的影响。PLA样品的特征还在于通过氦气比色法获得骨骼密度，并通过XRD和SEM获得形态和结构信息。结果表明，PLA代表了一种有效的生态替代材料，可用于捕获CO ₂。PLA的吸收能力在15 bar和303 K时达到16 wt％，并且与材料的热处理，形态和晶体结构密切相关。

更新日期：2020-07-02

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