聚氯乙烯和玉米秸秆协同热解，改善产品和脱氯性能

IF 10 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Cleaner Production Pub Date : 2025-04-14 DOI:10.1016/j.jclepro.2025.145534

Yongfu Zeng , Erfeng Hu , Guangwen Xu , Zuohua Liu , Guocan Zheng , Dean Pan , Jianglong Yu , Xin Jia , Moshan Li , Youcai Ma

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引用次数: 0

摘要

环境安全利用聚氯乙烯（PVC）的有效策略对于尽量减少其对环境的影响至关重要。研究了在红外加热反应器中对PVC和玉米秸秆进行共热解，以提高产品质量和减少盐酸的生成。该工艺表现出显著的协同作用，提高了油收率和焦炭中的氯保留率。在700°C、25% PVC条件下，油收率提高了12.66%，而GC-MS分析显示芳香族化合物的收率提高了17.51%，脂肪族化合物的收率降低了29.30%，含氮化合物的收率降低了10.43%，含氯化合物的收率降低了2.17%。共热解促进了玉米秸秆烯烃的环化，提高了芳烃的产量。氯分布分析表明，在500°C时，焦炭中保留了高达72%的氯，而在700°C时，HCl的排放量显著减少了84%。XPS和XRD结果证实，玉米秸秆中的K2O与HCl反应生成KCl，有效地捕获了炭中的氯。这些发现表明，共热解为PVC的可持续回收提供了一种很有前途的方法，可以减少HCl的排放，提高油的质量。

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Synergistic co-pyrolysis of polyvinyl chloride and corn stalk for improved products and dechlorination behavior

Efficient strategies for the environmentally safe utilization of polyvinyl chloride (PVC) are crucial to minimizing its environmental impact. This study investigates the co-pyrolysis of PVC and corn stalk in an infrared heating reactor to enhance product quality and mitigate hydrochloric acid (HCl) formation. The process exhibited significant synergy, improving oil yield and chlorine retention in char. At 700 °C with 25 % PVC, oil yield increased by 12.66 %, while GC-MS analysis revealed a 17.51 % rise in aromatic compounds, accompanied by reductions of 29.30 % in aliphatic compounds, 10.43 % in nitrogen-containing compounds, and 2.17 % in chlorine-containing compounds. Co-pyrolysis promoted the cyclization of olefins from corn stalk, enhancing aromatic production. Chlorine distribution analysis showed that up to 72 % of chlorine was retained in the char at 500 °C, while HCl emissions were significantly reduced by 84 % at 700 °C. XPS and XRD results confirmed that K₂O in corn stalk reacted with HCl to form KCl, effectively trapping chlorine in the char. These findings demonstrate that co-pyrolysis offers a promising approach for sustainable PVC recycling with reduced HCl emissions and enhanced oil quality.

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来源期刊

Journal of Cleaner Production 环境科学-工程：环境

CiteScore

20.40

自引率

9.00%

发文量

4720

审稿时长

111 days

期刊介绍： The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.