JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Xin-Xin Fu,Jian-Peng Li,Zhuo-Qian Li,Yan Liu,Chen-Xiao Feng,Hai-Yang Wang,Zhi-Peng Zhao,Qiao-Yun Liu,Zhong-Yi Liu,Zhi-Kun Peng
Biomass is a promising renewable carbon resource, and bio-based platform molecules such as furan derivatives play an important role in the green manufacturing of high value-added chemicals. Of these, the conversion of 2-methylfuran (2-MF) to 3-acetyl-1-propanol (3-AP) over a bifunctional catalyst has attracted significant interest. However, bifunctional catalysts prepared by traditional method suffer from poor catalytic performance and limited stability due to the agglomeration of metal NPs. Here, Pd@HZSM-5, in which Pd NPs were encapsulated in HZSM-5 in situ showed improved stability and 3-AP yield. The highest yield of 3-AP (90.6%) to date was obtained with a nearly 100% conversion of 2-MF. The catalytic performance over a series of Pd@Zeolite confirms the superiority of the encapsulation effect, which is ascribed to the optimal adjustment of metal/acid balance. The Pd@HZSM-5 catalyst displayed excellent stability due to the encapsulation structure, which restricts the Pd NPs agglomeration. The highest yield of 3-AP was obtained at a high concentration of 2-MF (60%), which implies a promising strategy for the green industrial manufacture of 3-AP. This work reports a new bifunctional catalytic system for the green synthesis of 3-AP from 2-MF, thus stimulating the downstream biomass market.
研究领域:
催化化学
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生物质能
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2025
·
IF 6.2
Wanchen Zhu,Zhongyang Luo,Feiting Miao,Longyi Liu
Biomass hydropyrolysis vapor upgrading (HPVU) is a promising approach for biofuel production, where metallic catalysts play a key role in oxygen removal and aromatic hydrocarbon formation. In this study, Pd/HZSM-5 and Mo/γAl 2 O 3 catalysts were prepared and utilized individually or in combination to investigate their effects on poplar HPVU in a continuous-flow reactor. Meanwhile, the influence of upgrading temperature on hydrodeoxygenation (HDO) reactions was studied. At an upgrading temperature of 400 ℃, combination of Pd/HZSM-5 and Mo/γAl₂O₃ resulted in an organic phase yield of 9.19 wt%. The mass yield and selectivity of aromatic hydrocarbons reached 8.13 wt% and 93.4 %, respectively, with selectivity of C8 + monocyclic aromatic hydrocarbons accounting for 56.7 %. The overall mass balance was 96.2 %. The presence of Pd promotes hydrogenation and hydroalkylation reactions, while Mo/γAl₂O₃ enhances deoxygenation. Additionally, its mesoporous structure facilitates reactant diffusion. The density functional theory calculations confirmed that Pd could efficiently activate H 2 and thus provide hydrogen radicals for HDO on Mo/γAl₂O₃ surface, which revealed the synergistic effect of these two catalysts. This study highlights that noble-metal catalyst aided by oxophilic metal catalyst can make a significant contribution to biomass HPVU.
研究领域:
能源与催化
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化学工程
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产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2021
·Vol. 13
·期 12
·10701-10710
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IF 4.987
Zeng Qin,Du Zhenyu,Luo Ligang
In this study, different bimetallic (Ru, Pd, and Pt) catalysts over a variety of supports (activity carbon, γ-Al 2 O 3 , TiO 2 , HZSM-5) were employed to improve the kraft lignin depolymerization process using isopropanol as in situ hydrogen source. The effect of catalysts was firstly investigated, which suggested that 1wt%Ru-1wt% Pd/HZSM-5 promoted the hydrogenolysis and hydrodeoxygenation effect on conversion of kraft lignin (95.86 wt%) and the selectivity of aliphatic alcohol (26.92 wt%) and hydrocarbon monomers (35.73 wt%), respectively. The effect of temperature and reaction time were also discussed, which indicated that the high temperature (250 to 310 °C) promoted the hydrogenolysis process; while the temperature is higher than 310 °C, the repolymerization process was appeared, leading to the decreasing yield of total monomers. For the influence of reaction time, it was noted that the optimal reaction time to acquired high yield and selectivity of aliphatic alcohol and hydrocarbon monomer was 120 min. It was also conducted FTIR and 2D HSQC NMR analysis to understand the effective depolymerization of the major linkages with attacked by the Ru-Pd/HZSM-5 catalyst, which was corresponding with the results with GC–MS. Graphical abstract
研究领域:
化学工程
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催化科学
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产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Shan Feng,Xinghua Zhang,Qi Zhang,Yuan Liang,Xuelai Zhao,Chenguang Wang,Longlong Ma
Production of aviation fuel is promising but challenging in the field of biomass utilization. Here we proposed a route to produce highly branched alkanes by the self-aldol condensation of methyl isobutyl ketone (MIBK), followed by the one-step hydrodeoxygenation (HDO). The catalytic activities of magnesium-aluminum mixed oxides (MgAl-O) were carefully explored in the self-aldol condensation of MIBK using cyclohexane as the solvent. The basic sites with moderate and strong strength play a key role in the self-aldol condensation of methyl isobutyl ketone, which can capture α-H, promoting the aldol condensation . Under an optimal condition, the yield of condensation product C12 oxygenate is 70.3%. Furthermore, the regeneration ability of 500-MgAl-O catalyst is tested in the self-aldol condensation of MIBK. In addition, hydrodeoxygenation of condensation products was also conducted over 2 wt% Pd/HZSM-5 catalysts. These obtained HDO products are highly branched alkanes with low freezing point (<−60 °C).
研究领域:
化学工程
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催化
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可再生能源
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生物燃料
✓ 已验证
产品关联
DOI
高影响因子
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