摘要
以推广工业化医疗废弃物热解处理为背景,以混合医疗废弃物为原料,利用两段式管式电炉在低温、氮气气氛等条件下,采用非原位催化的方式,对催化温度、原料与催化剂质量比以及催化剂种类的催化热解特性进行探究。结果显示,催化温度的升高会提升气态产物中H_(2)、CO和CH_(4)的选择性;随着原料与催化剂质量比的逐步增大,气态产率从21.99%提升至30.73%,H_(2)的选择性先下降后上升,CH_(4)的选择性先上升后下降;不同种类的催化剂其催化特性相差较大,Hβ催化剂的制氢效率最高(选择性41.45%,产量8.04 mmol/g)、HY催化剂对CH_(4)的选择性最好(29.78%)、USY催化剂的气态产率最高(41.30%)、SAPO-34催化剂的液态产率最高(58.74%)。ZSM-5可促进液态产物中大分子组分进一步分解,将C_(6)~C_(10)组分的含量从23.07%提升至73.93%。该文的研究内容及结论对推动热解技术应用于医疗废弃物工业化处理具有重要的参考意义。
Under the context of promoting industrialized treatment of medical waste,this study investigated the catalytic pyrolysis characteristics of mixed medical waste using a two-stage tubular electric furnace under low-temperature and nitrogen atmosphere conditions via a non-in situ catalytic mode.Systematic exploration was conducted on the effects of catalytic temperature,feedstock-to-catalyst ratio,and catalyst type.The results demonstrated that elevated catalytic temperatures enhanced the selectivity of H_(2),CO,and CH_(4)in gaseous products.With increasing feedstock-to-catalyst ratios,the gas yield increased from 21.99%to 30.73%,while H_(2)selectivity exhibited an initial decline followed by an upward trend,contrasting with the CH_(4)selectivity pattern which showed an inverse tendency.Significant variations in catalytic performance were observed among different catalysts:Hβcatalyst achieved optimal hydrogen production efficiency(41.45%selectivity,8.04 mmol/g yield),HY catalyst demonstrated superior CH_(4)selectivity(29.78%),USY catalyst yielded the highest gas production rate(41.30%),and SAPO-34 catalyst produced the maximum liquid yield(58.74%).Notably,ZSM-5 catalyst facilitated further decomposition of macromolecular components in liquid products,substantially increasing C_(6)-C_(10)fraction content from 23.07%to 73.93%.This research provides valuable insights into optimizing pyrolysis technology for industrial-scale medical waste treatment,particularly regarding catalyst selection and process parameter optimization.
作者
王静文
汤文君
陈景卫
马腾杰
芦天亮
李攀
彭智昆
WANG Jing-wen;TANG Wen-jun;CHEN Jing-wei;MA Teng-jie;LU Tian-liang;LI Pan;PENG Zhi-kun(Henan Tianchen Xinyuan Environmental Protection Technology Research Institute Co.,Ltd.,Zhengzhou 450001,China;Henan Institute of Advanced Technology,Zhengzhou University,Zhengzhou 450001,China;School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China;Henan Provincial Engineering Laboratory of Biomass Refining Technology and Equipment,Zhengzhou 450001,China)
出处
《现代化工》
北大核心
2026年第3期130-136,共7页
Modern Chemical Industry
基金
国家自然科学基金面上项目(22278380)。
关键词
医疗废弃物
低温催化
热解特性
分子筛催化剂
medical waste
low-temperature catalysis
pyrolysis characterization
molecular sieve catalysts
