Impact of Ni/Mg/Al catalyst composition on simultaneous H2-rich syngas recovery and toxic HCN removal through a two-step polyurethane pyrolysis and steam reforming process

研究成果: Article査読

4 被引用数 (Scopus)

抄録

Ni/Mg/Al catalysts with different atomic ratios were synthesized and tested for simultaneous H2-rich syngas recovery and toxic hydrogen cyanide (HCN) removal from polyurethane cushion waste. The waste decomposition products were converted into H2-rich syngas, and toxic HCN was removed using the Ni/Mg/Al catalysts. The catalyst composition drastically affected the ease of reduction to metallic Ni. Easily reduced catalysts effectively increased the syngas yield with redNi1.0Mg2.1Al6.0, giving the maximum syngas yield (1925 mL/g sample). Moreover, smaller Ni particle sizes (high dispersion) resulted in more effective HCN decomposition. Thus, red-Ni1.0Mg4.9Al4.1 gave the lowest HCN yield (0.9 wt %) and concentration (0.5 vol %). Durability testing revealed a decrease in the catalytic activity with repeated use (first cycle, 1497 mL/g sample; fifth cycle, 1148 mL/g sample). However, regeneration improved the gas yield (1515 mL/g sample) owing to the redispersion of the aggregated Ni particles. These results reveal the potential for the continuous use of catalysts, advancing the possibility of recycling polyurethane waste.

本文言語English
ページ(範囲)9023-9033
ページ数11
ジャーナルIndustrial and Engineering Chemistry Research
59
19
DOI
出版ステータスPublished - 2020 5 13

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)
  • 産業および生産工学

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