Catalytic effect of K and Na with different anions on lignocellulosic biomass pyrolysis

IF 4.3 3区工程技术 Q2 ENGINEERING, CHEMICAL Frontiers of Chemical Science and Engineering Pub Date : 2024-08-26 DOI:10.1007/s11705-024-2492-3

Haiping Yang, Zhiqiang Chen, Yi Zhang, Biao Liu, Yang Yang, Ziyue Tang, Yingquan Chen, Hanping Chen

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Abstract

Alkali metals (AMs) play an important role in biomass pyrolysis, and it is important to explore their catalytic effects so to better utilize biomass pyrolysis. This study analyzed the catalytic influence of K and Na with different anions (Cl⁻, SO₄²⁻, and CO₃²⁻) on biomass pyrolysis, and explored the influence on the pyrolytic mechanism. AM chlorides (NaCl and KCl), sulfates (Na₂SO₄ and K₂SO₄) and carbonates (Na₂CO₃ and K₂CO₃) were mixed with cellulose and bamboo feedstocks at a mass ratio of 20 wt %, in order to maximize their potential on in situ upgrading of the pyrolysis products. AM chlorides had little effect on the pyrolysis products, whereas sulfates slightly promoted the yields of char and gas, and had a positive effect on the composition of the gaseous and liquid products. Carbonates noticeably increased the yields of the char and gases, and improved the C content of the char. Besides, AM salt catalysis is an effective method for co-production of bio-oil and porous char.

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含有不同阴离子的 K 和 Na 对木质纤维素生物质热解的催化作用

碱金属（AMs）在生物质热解过程中发挥着重要作用，因此探讨其催化作用对更好地利用生物质热解具有重要意义。本研究分析了 K 和 Na 与不同阴离子（Cl-、SO42- 和 CO32-）对生物质热解的催化作用，并探讨了其对热解机理的影响。将 AM 氯化物（NaCl 和 KCl）、硫酸盐（Na2SO4 和 K2SO4）和碳酸盐（Na2CO3 和 K2CO3）与纤维素和竹子原料按 20% 的质量比混合，以最大限度地发挥它们对热解产物原位升级的潜力。AM 氯化物对热解产物的影响很小，而硫酸盐则略微提高了木炭和气体的产量，并对气态和液态产物的成分产生了积极影响。碳酸盐明显提高了焦炭和气体的产量，并改善了焦炭中的碳含量。此外，AM 盐催化是生物油和多孔炭联合生产的有效方法。

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来源期刊

Frontiers of Chemical Science and Engineering ENGINEERING, CHEMICAL-

CiteScore

7.60

自引率

6.70%

发文量

868

审稿时长

1 months

期刊介绍： Frontiers of Chemical Science and Engineering presents the latest developments in chemical science and engineering, emphasizing emerging and multidisciplinary fields and international trends in research and development. The journal promotes communication and exchange between scientists all over the world. The contents include original reviews, research papers and short communications. Coverage includes catalysis and reaction engineering, clean energy, functional material, nanotechnology and nanoscience, biomaterials and biotechnology, particle technology and multiphase processing, separation science and technology, sustainable technologies and green processing.