Steam cracking in fluidized beds offers an alternative to conventional steam cracking for sustainable hydrocarbon production. This approach has gained interest, particularly in the context of recycling plastics to generate valuable hydrocarbons. Integrating this process into existing petrochemical clusters necessitates a thorough characterization of the products derived from this new feedstock. This work focuses on addressing the challenges associated with species quantification and characterization time for assessing the product mixture resulting from a steam cracking process. The experiments were conducted in a semi-industrial scale dual fluidized bed steam cracker, utilizing polyethylene as the feedstock. To sample species spanning from C1 to C18, cooling, scrubbing, and adsorption were introduced. These steps were integrated with GC-VUV (Gas Chromatography with Vacuum Ultraviolet Spectroscopy) and other widely recognized analytical methods to quantify the sampled species. The primary focus was on GC-VUV analysis as a suitable characterization method for identifying and quantifying C4 to C18 species, which can constitute up to 35% of the product mixture obtained from polyethylene steam cracking (750 °C to 850 °C). Quantifying C6 to C18 hydrocarbons becomes the time-critical step, with GC-VUV potentially achieving this in 1/6th of the analysis time and with relatively optimal quantification compared to the traditional characterization methods.

中文翻译：

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使用 GC-VUV 半工业规模流化床蒸汽裂解装置的产物气体混合物的方法开发和评估

流化床中的蒸汽裂化为可持续碳氢化合物生产提供了传统蒸汽裂化的替代方案。这种方法引起了人们的兴趣，特别是在回收塑料以产生有价值的碳氢化合物的背景下。将该工艺整合到现有的石化集群中需要对这种新原料衍生的产品进行彻底的表征。这项工作的重点是解决与物种量化和表征时间相关的挑战，以评估蒸汽裂解过程产生的产品混合物。实验在半工业规模的双流化床蒸汽裂解装置中进行，使用聚乙烯作为原料。对于从 C1 到 C18 的样品物种，引入了冷却、洗涤和吸附。这些步骤与 GC-VUV（真空紫外光谱气相色谱法）和其他广泛认可的分析方法相结合，以量化采样物质。主要重点是 GC-VUV 分析作为识别和量化 C4 至 C18 物质的合适表征方法，这些物质可占聚乙烯蒸汽裂解（750 °C 至 850 °C）获得的产品混合物的高达 35%。量化 C6 至 C18 碳氢化合物成为时间关键的步骤，与传统表征方法相比，GC-VUV 可能只需 1/6 的分析时间即可实现这一目标，并且具有相对最佳的量化效果。