Molecular Catalysis
·
2022
·
IF 5.089
Huixing Xu,Xin Ye,Xiaoyu Shi,Heng Zhong,Daoping He,Binbin Jin,Fangming Jin
Catalytic production of lactic acid (LA) from biomass has attracted increasing attention due to the wide applications of LA. However, the industrial-scale production of LA is seriously limited by the complex synthetic process of efficient catalyst. In this work, we applied commercially available ZnO as a simple and facile heterogeneous catalyst to catalyze the conversion of glucose into LA under hydrothermal conditions. The ZnO possesses abundant strong Lewis acid and base sites and acts as bifunctional catalyst to promote the cascade reactions from glucose to LA, leading to a high yield of 41.5%. The robustness of catalytic process and the wide scope of applicable substrates like monosaccharides and disaccharides further extend the application of hydrothermal biomass conversion using facile catalysts.
研究领域:
化学工程
·
可再生能源
·
催化化学
✓ 已验证
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2020
·Vol. 93
·期 13
·2620-2627
·
IF 0.719
Yanyan Xu,Lu Tianliang,Bu Ningning,Luo Qianqian,Qing Yashi,Lin Li
Abstract Catalytic conversion of biomass based platform chemicals to value added chemicals has attracted much attention recently. In this work, Ni-based catalysts were developed for the conversion of levulinic acid to γ-valerolactone. By investigation of reduction behavior of NiO, it was found that a relatively low reduction temperature (300°C) can provide the reduction of NiO to Ni 0 . The high reduction temperature (500°C) generally applied in literature is not necessary. The effect of supports was also studied, and hierarchical AlPO 4 -5 (AlPO 4 -5-meso) supported Ni showed the best catalytic performance due to the proper pore size of AlPO 4 -5-meso, which contains both micropores and mesopores. The effect of Ni loading was also investigated, 10 wt % of Ni is enough for this reaction, which is lower than the reported amount of Ni loading. By using Ni/AlPO 4 -5-meso with 10 wt % Ni as catalyst, 84% γ-valerolactone yield and 100% levulinic acid conversion can be obtained after reaction for 10 h at 180°C.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xiangjun Liu,Jingjing Ma,Shuai Zhang,Guo-Wei Guan,Qing-Yuan Yang,Junqi Wang
Harvesting solar energy to drive highly efficient photocatalytic conversion of renewable biomass to value-added chemicals and H 2, is a green and promising strategy to acquire clean H 2 with high energy density. In this study, CdS nanoparticles/Ti 3 C 2 T x nanosheets (Ti 3 C 2 T x /CdS composites) photocatalysts were prepared by a hydrothermal strategy. With an optimized Ti 3 C 2 T x loading of 0.8 wt%, the Ti 3 C 2 T x /CdS composites exhibited a significant enhancement in the photocatalytic H 2 evolution reaction with long-term stability, reaching 20,427 μmol·g −1 ·h −1 , compared to the pristine CdS (1,999 μmol·g −1 ·h −1 ). The Ti 3 C 2 T x /CdS-0.8 reflects appropriate electronic band structure and excellent conductivity, resulting in efficiently generation and migration of photoinduced electrons. In addition, the apparent quantum yield of Ti 3 C 2 T x /CdS-0.8 was 9.4% at 420 nm, higher than that of pristine CdS (1.2%). Superior results (7,164 μmol·h −1 ·g −1 ) were also achieved in the conversion of raw biomass to H 2 under natural sunlight. Achieving solar-driven H 2 production from biomass represents a significant step forward in contributing to sustainable and clean energy practices.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 20
·3498
·
IF 4.329
Shengqi Liu,Ye Meng,Hu Li,Song Yang
Considering economic and environmental impacts, catalytic biomass conversion to valuable compounds has attracted more and more attention. Of particular interest is furfural, a versatile biorefinery platform molecule used as a feedstock for the production of fuels and fine chemicals. In this study, the Cr-based metal-organic frameworks (MOFs) MIL-101 were modified by chlorosulfonic acid, and MIL-101 was changed into a hierarchical MOF structure with smaller particles and lower particle crystallinity by CTAB, which significantly improved the acidic sites of the MOFs. The original and modified MIL-101(Cr) catalysts were characterized by XRD, N2adsorption-desorption, SEM, TEM, and FT-IR. The effects of different catalysts, reaction temperature, catalyst amount, and alcohol type on the reaction were studied. Under the action of the MOFs catalyst, a new mild route for the condensation of furfural with various alkyl alcohols to the biofuel molecules (acetals) was proposed. The conversion route includes the conversion of furfural up to 91% yield of acetal could be obtained within 1 h solvent-free and in room-temperature reaction conditions. The sulfonic acid-functionalized MIL-101(Cr) is easy to recover and reuse, and can still maintain good catalytic activity after ten runs.Keywords:biomass conversion;MIL-101(Cr);furfural;green chemistry;heterogeneous catalysis
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Processes
·
2025
·Vol. 13
·期 4
·1110
·
IF 2.8
Shikang Zhao,Guohong Chen,Kaiqi Zheng,Shaojie Li,Jiaqi Xu,Fanan Wang,Xueping Liu,Rengui Weng
γ-Valerolactone (GVL) is a promising bio-based platform molecule with significant potential for energy applications. The production of GVL via biomass-based levulinic acid (LA) is an important reaction. To enhance the conversion and selectivity of non-precious-metal catalysts in the LA-to-GVL process and to better understand the key factors influencing this conversion, we conducted a series of experiments. In this study, supported Cu-Ni bimetallic catalysts (Cu-Ni2/Al2O3) were prepared using layered double hydroxides (LDHs) as a precursor. Compared with Cu-Ni catalysts synthesized via the conventional impregnation method, the Cu-Ni2/Al2O3catalysts exhibit higher catalytic activity and stability. The results demonstrated that efficient conversion was achieved with isopropanol as the hydrogen donor solvent, a reaction temperature of 180 °C, and a reaction time of 1 h. The yield of GVL reached nearly 90%, with a decrease of approximately only 6% after six consecutive cycles. The Cu-Ni2/Al2O3catalyst proved to be effective for converting biomass-derived LA to GVL, offering a route that not only reduces production costs and environmental impact but also enables efficient biomass-to-energy conversion.
研究领域:
催化化学
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能源科学
·
生物质利用
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2017
·Vol. 19
·期 20
·4829-4837
·
IF 9.125
Yufei Sha,Zhenhuan Xiao,Huacong Zhou,Keli Yang,Yinmin Song,Na Li,Runxia He,Keduan Zhi,Quansheng Liu
With the increasing demands for energy and carbon resources, exploration of novel utilization approaches of fossil resources and promotion of the conversion of sustainable resources become critical issues facing human society. In this study, we used humic acids (HAs), which are important derivatives from the low-rank coal, and the transition metal zirconium (Zr) to construct novel Zr-containing catalysts (Zr-HAs) for Meerwein–Ponndorf–Verley (MPV) reactions of biomass-derived platforms. Both commercial HAs and HAs extracted directly from lignite without any purification were used as raw materials to prepare the catalysts. The results showed that Zr-HAs catalysts were highly efficient for the conversion of furfural, with a high furfuryl alcohol yield of up to 97%, and also effective for the conversion of other carbonyl compounds with different structures under mild conditions. This novel strategy to construct catalysts using HAs as raw materials may be beneficial for both value-added utilization of low-rank coal and the conversion of biomass resources.
研究领域:
能源化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
·
2022
·
IF 12.781
Qi Zhao,Christian Marcus Pedersen,Jiamin Wang,Rui Liu,Yuanli Zhang,Xiuyin Yan,Zhenzhou Zhang,Xianglin Hou,Yingxiong Wang
The component analysis and structure characterization of complex mixtures of biomass conversion remain a challenging work. Hence, developing effective and easy to use techniques is necessary. Diffusion-ordered NMR spectroscopy (DOSY) is a non-selective and non-invasive method capable of achieving pseudo-separation and structure assignments of individual compounds from biomass mixtures by providing diffusion coefficients ( D ) of the components. However, the conventional 1 H DOSY NMR is limited by crowded resonances when analyzing complex mixtures containing similar chemical structure resulting in similar coefficient. Herein we describe the application of an advanced diffusion NMR method, Pure Shift Yielded by CHirp Excitation DOSY (PSYCHE-iDOSY), which can record high-resolution signal diffusion spectra efficiently separating compounds in model and genuine mixture samples from cellulose, hemicellulose and lignin. Complicated sets of isomers ( d -glucose/ d -fructose/ d -mannose and 1,2-/1,5-pentadiol), homologous compounds (ethylene glycol and 1,2-propylene glycol), model compounds of lignin, and a genuine reaction system (furfuryl alcohol hydrogenolysis with ring opening) were successfully separated in the diffusion dimension. The results show that the ultrahigh-resolution DOSY technique is capable of detecting and pseudo-separating the mixture components of C 5 /C 6 sugar conversion products and its derivative hydrogenation/hydrogenolysis from lignocellulose biomass.
研究领域:
分析化学
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生物质能
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Yu Nanxi,Lu Houfang,Yang Wei,Zheng Yuxin,Hu Qiang,Liu Yingying,Wu Kejing,Liang Bin
In the process of converting biomass into high value-added chemicals, transfer hydrogenation as a mild hydrogenation method has attracted more and more attention. The catalysts with hydrogenation sites (nano CuNi alloy) and acid sites (Al oxide) highly dispersed on the surface of a stable support (active carbon) were prepared and the importance of acid sites for the activity of CuNi catalysts in transfer hydrogenation was demonstrated. The catalysts showed promising catalytic activity on the transfer hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL). The CuNi-1Al/AC with 5 wt.% CuNi alloy and 5 wt.% Al got 97.2% GVL yield and 100% LA conversion at 220 ℃ in isopropanol for 2 h. The high activity of the catalyst is attributed to the promoted esterification by the supported acid sites. The Al-modified catalyst also showed activity for esterification reaction in different alcohol hydrogen donors. The catalyst occurs inactive during the cycle due to the shedding of the active components, and the stability of catalyst is effectively improved by a stepwise impregnation. Graphical abstract
研究领域:
催化化学
·
可再生资源化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 19
·14859
·
IF 5.6
Yan Xiao,Jie Li,Yuan Tan,Xingkun Chen,Fenghua Bai,Wenhao Luo,Yunjie Ding
Catalytic conversion of biomass-derived ethanol into n-butanol through Guerbet coupling reaction has become one of the key reactions in biomass valorization, thus attracting significant attention recently. Herein, a series of supported Cu catalysts derived from Ni-based hydrotalcite (HT) were prepared and performed in the continuous catalytic conversion of ethanol into butanol. Among the prepared catalysts, Cu/NiAlOxshows the best performance in terms of butanol selectivity and catalyst stability, with a sustained ethanol conversion of ~35% and butanol selectivity of 25% in a time-on-stream (TOS) of 110 h at 280 °C. While for the Cu/NiFeOxand Cu/NiCoOx, obvious catalyst deactivation and/or low butanol selectivity were obtained. Extensive characterization studies of the fresh and spent catalysts, i.e., X-ray diffraction (XRD), Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Hydrogen temperature-programmed reduction (H2-TPR), reveal that the catalysts’ deactivation is mainly caused by the support deconstruction during catalysis, which is highly dependent on the reducibility. Additionally, an appropriate acid–base property is pivotal for enhancing the product selectivity, which is beneficial for the key process of aldol-condensation to produce butanol.Keywords:Ni-based hydrotalcite;biomass conversion;support effect;selectivity;stability
研究领域:
催化化学
·
生物质能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Shiyao Lu,Jian Zhang,Hao Meng,Xiaoyuan Qin,Jianbin Huang,Yehao Liang,Feng-Shou Xiao
The direct dehydrogenation of ethyl lactate (EL) to produce ethyl pyruvate (EP) over non-precious heterogeneous catalysts is highly desirable, but challenging. Herein, we report a highly efficient silica-supported copper catalyst prepared via a hydrolysis-precipitation method (Cu/SiO 2 -HP) for the dehydrogenation of ethyl lactate, which exhibited an 85.4 % EL conversion with 91.1 % selectivity toward EP at 320 °C. XAFS, in situ XPS, and CO-adsorption FT-IR spectra revealed that the Cu/SiO 2 -HP catalyst had abundant Cu 0 /Cu + interfaces. In situ FT-IR spectra, kinetic studies , and theoretical calculations also demonstrated that the Cu 0 /Cu + interfaces synergistically activate the O−H and C−H bonds in the adsorbed EL for direct dehydrogenation into EP. The H/D kinetic isotope effect for model reaction confirmed that C−H bond activation is the key step in the dehydrogenation reaction. This study offers a new approach toward the selective conversion of EL into EP, which is of great significance for biomass conversion .
研究领域:
催化
·
化学工程
·
材料科学
·
生物质转化
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Hefeng Zhang,Yong Zhao,Huiyan Zhang,Haichuan Zhou,Hong Wang,Xu Zong,Heng Yin,Can Li
Integrating semiconductor light absorbers with biological catalysts (enzymes etc.) could combine the strengths of both components towards efficient and tunable light-driven chemical reactions. Herein, we established an inorganic-biological hybrid platform by integrating a silicon photocathode and a lytic polysaccharide monooxygenases (LPMOs)-based enzymatic system with quinones as linkers. Through engineering the catalytic sites of the photocathode and screening mediators with desirable redox potential windows, visible light-driven conversion of α-chitin to soluble oxidized oligosaccharides via cascade catalysis were realized in the hybrid system with improved efficiency. This transformation scheme can be realized at mild conditions, which conceptually provides an environmentally-benign approach for the sustainable conversion of biomass like α-chitin to useful chemicals by utilizing solar energy.
研究领域:
生物化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xueqing Gao,Ziwei Wang,Juan Du,Aibing Chen
It is desirable that catalysts preparation and subsequent application can be driven by only one set of equipment, enabling efficient system integration, hydrogen generation and value-added chemicals acquisition. Here we demonstrate a strategy of tandem paired electrodes, which contain a deeply foaming electrode with vacancy as cathode (DF/cNF) for electroreductive water splitting, and a wrinkled NiMoO 4 -Ni(OH) 2 heterojunction electrode serving for anode (NiMo-Ni/aNF) to electrooxidize biomass conversion. For integrally paired electrodes, DF/cNF shows excellent HER performance with 43 mV overpotential at 10 mA cm −2 , and NiMo-Ni/aNF exhibits good biomass oxidation activity, such as almost 100 % 5-hydroxymethylfurfural conversion and 96.4 % 2,5-furandicarboxylic acid selectivity. Remarkably, in situ Raman spectra and operando scanning electrochemical microscopy (SECM) analysis indicate NiMoO 4 -Ni(OH) 2 heterojunctions stabilize the vital Ni III intermediate role in oxidation reaction. Density functional theory (DFT) results further prove the advantage of Ni vacancy for enhanced HER activity and interface for improving biomass oxidation performance. This work delivers a novel system of tandem paired electrodes and highlights precise control for catalysts by geometric and electronic structural engineering.
研究领域:
能源科学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）