能源环境保护2025，Vol.39Issue(3)：137-145,9.DOI:10.20078/j.eep.20241201
均相体系催化转化农业废弃玉米秸秆为高价值平台分子
Homogeneous Catalytic Conversion of Agricultural Waste Corn Stalks into High-Value Platform Molecules
摘要
Abstract
The extensive consumption of traditional fossil energy has led to increasingly severe energy shortages and environmental pollution.Biomass,a widely available and abundant renewable resource,exhibits significant potential as a substitute for traditional fossil energy.A critical step in the efficient utilization of biomass is its catalytic conversion into platform molecules,such as furfural and 5-hydroxymethylfurfural(HMF).These platform molecules can undergo catalytic upgrading to produce high-value chemicals,playing a crucial role in promoting the development of green and sustainable energy.Previous research on biomass conversion focused on maximizing the yield of a single product,which has limited the comprehensive utilization of biomass.In order to fully utilize the cellulose and hemicellulose fractions of the corn stalks,agricultural waste corn stalks were used as the feedstock,with dilute sulfuric acid as the catalyst for the homogeneous catalytic conversion of corn stalks into furfural and HMF.A synergistic optimization strategy was employed to simultaneously enhance the yields of both furfural and HMF.The effects of temperature,acid concentration,solid-to-liquid ratio,and solvent on the reaction were thoroughly investigated.By comparing the hydrothermal treatment of corn stalks under catalyst-free conditions,it was found that the acidic environment promoted the destruction of corn stalk structure and intensified the depolymerization reaction,thus accelerating the conversion of corn stalks.Further optimization of the reaction conditions demonstrated that the yields of furfural and HMF could be significantly increased by using the γ-valerolactone-water solvent system with an optimal solid-liquid ratio of 1∶20,the yield of furfural reached a maximum of 62.4%after 60 min at 180℃,while the yield of HMF reached a maximum of 24.9%after 100 min.Further studies on product stability showed significant improvement in the γ-valerolactone-water system compared with the aqueous solution,and the mass loss rate of furfural was reduced from 25.5%in the aqueous solution to 3.2%in the γ-valerolactone-water system.The presence of the organic solvent limited the degradation reaction and condensation reaction of furfural itself,which facilitated an improvement in furfural yield and ensured its stable existence in the system after production.As for 5-hydroxymethylfurfural,its mass loss in the aqueous system and γ-valerolactone-water system reached 80.6%and 78.6%,respectively,suggesting its poor stability.This study systematically reveals the reaction mechanisms of the homogeneous catalytic conversion of corn stalks into furfural and HMF using dilute sulfuric acid,providing valuable insights for the high-value utilization of biomass resources.关键词
农业废弃秸秆/生物质/稀硫酸均相催化/糠醛/5-羟甲基糠醛Key words
Agricultural waste stalks/Biomass/Dilute sulfuric acid homogeneous catalysis/Furfural/5-hydroxymethylfurfural分类
环境科学引用本文复制引用
易子骁,曾永健,蒋志伟,仇荣亮,严凯..均相体系催化转化农业废弃玉米秸秆为高价值平台分子[J].能源环境保护,2025,39(3):137-145,9.基金项目
国家重点研发计划资助项目(2023YFC3905804,2024YFE0203000) （2023YFC3905804,2024YFE0203000）
广州市科技计划资助项目(202206010145) （202206010145）
国家自然科学基金资助项目(22078374,22378434) （22078374,22378434）
