JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Huidong Zheng,Xiheng Luo,Guanghua Yin,Jingjing Chen,Suying Zhao
The saturated vapor pressures of furfural (FUR), 2-acetylfuran (2AF), and 5-methylfurfural (5MF) and the isobaric vapor–liquid equilibrium (VLE) data for three binary systems (FUR + 2AF, FUR + 5MF, and 2AF + 5MF) at 3.60 and 5.18 kPa were experimentally measured in a Rose–Williams still. The saturated vapor pressures were correlated by the Antoine equation; the binary VLE data were correlated by the nonrandom two-liquid, Wilson, and universal quasichemical models. The VLE of the ternary system of FUR + 2AF + 5MF was predicted by the obtained binary interaction parameters for each model, and the predictions fit well with the experimental data.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Tong Zhou,Qingqing Chai,Man Zhang,Heping Cui,Ahmad Mohammad,Khizar Hayat,Xiaoming Zhang,Chi-Tang Ho
Exogenous xylose (Xyl) could promote 2-furfural formation but inhibit pyrazines generation during its co-heating with alanine (Ala)-Xyl Amadori rearrangement product (AX-ARP). The activation energy of AX-ARP formation from Ala and Xyl was considerably lower than that of pyrazine formation from Ala and glyoxal (GO). Accordingly, the preferential interaction of exogenous Xyl with regenerated Ala triggered a continuous cycle of consumption and regeneration of Ala in AX-ARP-Xyl model. In this way, functioning as a catalyst, regenerated Ala facilitated the continuous conversion of AX-ARP into deoxyxylosones (DXs). However, exogenous Xyl accelerated the pH drop during the thermal treatment of AX-ARP, which favored the conversion of DXs into 2-furfural while limiting the transformation of their α-dicarbonyl fragments into pyrazines. Model reactions of AX-ARP-[ 13 C 5 -Xyl] further confirmed that exogenous Xyl was progressively converted into 2-furfural, while its downstream products, such as GO and methylglyoxal (MGO), did not exhibit an enhanced tendency to form pyrazines.
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Molecular Catalysis
·
2024
·
IF 3.9
Meng Xu,Xiaoling Liu,Zhuo Xiong,Yue Wu,Zhen Meng,Yu Zhou,Jun Wang
Furfural is an abundant biomass-derived building block that can be converted into furan-based N-containing compounds through direct reductive amination by using dihydrogen (H 2 ). Nonetheless, the synthesis of furan-based tertiary amines is highly limited via this route. Herein, we reported the straightforward synthesis of MFI zeolite encapsulated Pt nanoparticles and finely modulated the surface electronic state by facilely controlling the reduction process. The constructed catalyst Pt@Z5 effectively catalyzed the amination of furfural with diethylamine for the synthesis of N-ethyl-N-(furan-2-ylmethyl)ethanamine, affording the high yield (>95 %), large turnover number (TON) of 2058, turnover frequency (TOF) of 1029 h −1 , and stable recyclability. Systematic investigations comprising in-situ Fourier transform infrared spectroscopy (FTIR) spectra and kinetic isotope effect (KIE) unraveled that the mild reduction condition allowed the catalyst with a superior affinity towards H atom and beneficial furfural adsorption behavior, accelerating the H 2 activation in the rate-determining step for the conversion of furfural into furan-based amine.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qing-Qing Pang,Xi-Zheng Fan,Sha-Sha Yi,Xin Du,Zhong-Yi Liu,Xin-Zheng Yue
The design of bifunctional catalysts with spatially separated active sites holds significance importance in achieving simultaneous electrooxidation and hydrogen evolution reaction (HER). Herein, a core-shell Re-Ni@Ni(OH) 2 /CC heterostructure is demonstrated for the electrocatalytic furfural oxidation reaction (FOR) coupled with HER. Experimental results and theoretical analyses reveal that Re not only modulates the heterointerface between Re-Ni core and Ni(OH) 2 shell, facilitating furfural (FF) adsorption at Ni(OH) 2 sites, but also regulates electronic structure of Ni. This leads to a negative shift in the d-band center from Fermi level, effectively weakening hydrogen adsorption at Ni sites in Re-Ni@Ni(OH) 2 heterostructure, thereby improving the HER process. As a result, the synthesized Re-Ni@Ni(OH) 2 /CC exhibits a low cell voltage of 1.40 V @10 mA cm −2 for the FOR||HER. This study highlights the importance of modulating metal’s electronic structure and identifying active sites, which has great potential for improving bifunctional electrocatalytic reactions.
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Inorganic Chemistry Frontiers
·
2026
·
IF 6.4
Jun Wu,Gang Pan,Ming Jin,Jiahao Bai,Tailong Shi,Yong Li
The catalytic reductive amination of biomass-derived carbonyl compounds into value-added primary amines has attracted significant attention in renewable biomass upgrading. Herein, highly dispersed Ru clusters embedded nitrogen-doped hollow carbon spheres (Ru@NHCS) catalysts were constructed, which achieved a 100% furfurylamine (FUA) yield, and exhibited the superior initial reaction rate of 3745.7 mmol gRu-1 h-1 and turnover frequency of 378.58 h-1 in the reductive amination of biomass-derived furfural. Systematic structure characterization indicated that the presence of abundant N species promoted the uniform dispersion of Ru clusters and induced the electronic metal-support interaction (EMSI) between Ru and NHCS support, thus leading to the formation of bifunctional Ru0 and Ruδ+ active sites. Structure-activity relationship study demonstrated that the synergistic catalysis of Ru0 and Ruδ+ active sites effectively promoted the adsorption and activation of H2 and NH3 molecules, and accelerated the hydrogenation of imine and the aminolysis of Schiff base intermediates, thereby achieving the highly selective synthesis of FUA under mild reaction conditions. Moreover, the Ru@NHCS catalyst exhibited excellent catalytic stability in the five consecutive cycles, and showed broad substrate applicability for sustainable primary amine synthesis. This work not only unveils rational design strategies for developing efficient, stable metal catalysts to achieve highly selective synthesis of value-added primary amines but also provides essential theoretical guidance for efficient biomass conversion.
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APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Peng Zhang,Pan Hou,Mingwei Ma,Ke Bu,Qi Guo,Huijuan Yue,Ge Tian,Shouhua Feng
The transformation of lignocellulosic biomass to platform compounds (γ-valerolactone, GVL) was a significant component in biomass development. Herein, sulfonated Zr-based metal-organic frameworks (MOF-808), a bifunctional heterogeneous catalyst with Lewis and Bronsted acid sites, were prepared to catalyze the one-pot cascade reaction of furfural (FUR) to GVL. The successful modification of the sulfonic group on MOF-808 was substantiated by multiple characterization methods. By adjusting the sulfuric acid concentration to balance the Lewis acid and Bronsted acid sites of the catalyst, S-808–2.37 was confirmed as the preferred catalyst and a 60.4 % GVL yield was achieved with 99.1 % carbon balance under the optimal conditions. Moreover, the 72.8 % GVL yield reached in the 40x magnification experiment also boded well for the catalyst’s application potential. The work in this paper opened up new perspectives for the application of MOF-808 porous materials in the field of selective catalytic conversion of biomass involving multi-step reactions.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Meng-xing Xu,Yan Xu,Yu-zhen Liu,Dan Zhao,Shun-min Ding,Chao Chen
Acquiring practical catalysts was crucial for promoting the application of advanced chemical transformations. Here, a series of Co-Ni-P catalysts with addition of Y were designed for hydrogenation transformation of biomass-derived levulinic acid (LA) or furfural (FAL) in water. The molar-composition-manipulated catalysts were characterized in Co-Ni phosphide alloy nanostructure with YPO 4 enriched on surface and denoted as (YPO 4 ) x /Co y Ni 2-y P. By comprehensive catalytic measurements, both Co:Ni ratio in phosphide alloy and amount of YPO 4 were testified to be key factors to modulate intrinsic catalytic properties (hydrogen activation and acid catalysis) along Y-Co-Ni-P interface, the attractive and reproducible yield for desired product γ-valerolactone (up to 98 %) or cyclopentanone (up to 93%) could achieve under low H 2 pressure of 0.1–0.5 MPa over the well modulated catalyst (YPO 4 ) 0.2 /Co 1.0 Ni 1.0 P in comparison with high H 2 pressure (beyond 1.0 MPa) required in most of literature systems, indicating that the efficiency and feasibility of these important biomass transformations could be greatly enhanced on the low-cost and robust (YPO 4 ) x /Co y Ni 2-y P catalysts. These findings suggested that the phosphide-alloy engineering technique provided in this work could serve as a novel and practical method for innovating competitive catalysts to boost advanced heterogeneous catalysis applications as well as current aqueous hydrogenation transformations of biomass derivatives.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 49
·12659-12666
·
IF 5.236
Mingwei Ma,Na Liang,Pan Hou,Peng Zhang,Jingjie Cao,Hui Liu,Xingliang Xu,Huijuan Yue,Ge Tian,Shouhua Feng
Graphical The by-product (called humins) is accompanied by a one-pot catalytic conversion reaction of furfural (FAL) to isopropyl levulinate (PL), which is carbonized (Humins-700) and applied to a new experiment of electromagnetic wave absorption, showing superior electromagnetic wave absorption performance. The minimum reflection loss (RLmin) value is −47.3 dB at 13.0 GHz with a thickness of 2.0 mm. This provides inspiration that humins can be applied to electromagnetic wave absorption. Both one-pot catalytic conversion of furfural (FAL) to isopropyl levulinate (PL) and carbonization of by-product (humins) for electromagnetic wave absorption are discussed, which provides inspiration that humins can be applied to electromagnetic wave absorption. In the former, phosphotungstic acid (PW) is employed as a homogeneous catalyst to convert FAL to PL via a tandem reaction in one pot, with the formation of a vast amount of humins. With FAL and various intermediates as substrates, it was found that humins was a polymerization product of FAL, furfuryl alcohol (FOL) and furfuryl ester (FE) with furan rings. In addition, the in situ attenuated total reflection infrared (ATR-IR) spectra also provided a basis for the proposed reaction route. In the latter, with the humins as raw material, P species and WO 3 doped nano-porous carbon (Humins-700) platform formed after high-temperature annealing is used for electromagnetic wave absorption and manifests desirable absorption performance. The minimum reflection loss (RL min ) value is −47.3 dB at 13.0 GHz with a thickness of 2.0 mm and the effective absorption bandwidth reaches 4.5 GHz (11.2–5.7 GHz).
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Heng Mao,Shen-Hui Li,Ao-Shuai Zhang,Li-Hao Xu,Heng-Xing Lu,Jing Lv,Zhi-Ping Zhao
Furfural is a typical biomass-derived platform chemical. Conventional processes for furfural production are uneconomical and energy-intensive because only about 3–6 wt% of furfural in the hydrolysate needs to be separated. In this study, a series of mixed matrix membranes (MMMs) were prepared by incorporating MIL-53(Al) particles (MAPs) into poly (ether-block-amide) (PEBA 2533) matrix for pervaporation separation of furfural from aqueous solutions. The MAPs with anisotropic morphology and tunable particle size were precisely synthesized by a high-efficiency solvent-controlled microwave synthetic strategy. Effects of MAPs on the microstructures, physicochemical properties of MAPs/PEBA MMMs were investigated in detail through SEM, EDS, XRD, FTIR, TGA, N 2 adsorption and contact angle measurements. The experimental results suggested that compared with the PEBA control membrane, the addition of MAPs notably reduced the permeation energy barrier for furfural, but not for water. The coin-like MAPs-16.7 filled MMMs presented the optimal separation performance, which exceeded other furfural-permselective membranes. Impressively, a high total flux of 3800 g∙m −2 ∙h −1 and an adequate furfural/water separation factor of 50.2 was achieved in PV separation of 1 wt% furfural aqueous solution at 80 °C, which could substantially reduce capital investment and equipment footprint. Furthermore, a continuous testing was operated for 200 h in ternary furfural/acetic acid/water simulated hydrolysate, highlighting the long-term membrane stability in realistic applications. High performance and long-term stability made MAPs/PEBA MMMs potential candidates for industrial furfural production.
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RSC Advances
·
2016
·Vol. 6
·期 80
·76707-76715
·
IF 3.289
Bing Yan,Hongjun Zang,Yi Jiang,Songbai Yu,Eugene Y.-X. Chen
Six Na+/montmorillonite (MMT) – supported thiazolium (TM) ionic liquids (ILs), MMT–[TM], which are precatalysts to N-heterocyclic carbene (NHC) catalysts, have been synthesized and employed to catalyze the highly selective condensation of furfural (FF) and 5-hydroxymethylfurfural (HMF) into C10 and C12 furoins, respectively. Among them, five supported [TM] salts carrying the electron-donating group exhibit excellent catalytic activity. Thus, supported NHC catalysts, generated in situ from activation of MMT–[TM] with Et3N, afford C10 and C12 furoins in 97–99% and 97–98% yield, respectively. This condensation reaction is also carried out under solvent-free conditions, and the catalysts can be readily recycled, showing no noticeable loss in their catalytic activity over four consecutive recycles. Thus, these desired features possessed by the current catalyst system have enabled the development of the greener and more environmentally benign process for the upgrading of FF and HMF.
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Molecular Catalysis
·
2025
·
IF 4.9
Baoting Yi,Huimei Wang,Keyin Liu,Xiaohui Wang,Fangong Kong,Junli Ren
Catalytic biomass conversion is a crucial pathway for high-value utilization of renewable resources, yet current catalysts face limitations such as insufficient acid sites, poor product selectivity, and low cycling stability. This study developed a magnetic tin-based solid acid catalyst (Fe 3 O 4 @PDA-Sn) using 5-sulfoisophthalic acid sodium salt as a ligand and dopamine hydrochloride-coated Fe 3 O 4 for targeted catalytic conversion of sugarcane bagasse. Results demonstrated that the catalyst achieved a furfural yield of 86.2% and a levulinic acid yield of 32.5% at 170°C for 90 min, with FT-IR, NMR, and XRD confirming its differential deconstruction capability toward cellulose and hemicellulose. Mechanistic analysis demonstrated that the coordinated interaction between Brønsted and Lewis acid sites played a crucial role in steering the reaction toward specific pathways: hemicellulose hydrolysis products underwent dehydration to furfural (enriched in the organic phase), while cellulose was selectively cleaved to form levulinic acid. The catalyst maintained stable performance over 5 cycles without regeneration, with 97.3% magnetic recovery efficiency, offering a novel "facile magnetic separation–excellent cycling performance" strategy for hierarchical biomass conversion. This work provides critical insights into the design of multifunctional biorefinery catalysts for sustainable biomass valorization.
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Reaction Chemistry & Engineering
·
2025
·
IF 3.1
Liping Luo,Wenxuan Wu,Yanan Shen,Yuheng Tao,Liqun Wang,Qing Qing
High-value valorization of cellulose and hemicellulose fractions in lignocellulosic biomass is crucial for a feasible biomass refinery scheme. In this study, an integrated strategy was developed for pretreatment of corncob and coproduction of furfural and high-concentration fermentable sugars. The hemicellulose fraction in raw corncob was selectively extracted to produce a xylose-rich hydrolysate via pretreatment with dilute p-toluenesulfonic acid (p-TsOH) under optimal reaction conditions (0.5% p-TsOH, 160 °C, and 30 min). Thereafter, the xylose hydrolysate was subjected to catalytic conversion in a DES (TEBAC : LA = 1 : 4) system at 190 °C for 10 min. Notably, 78.6% furfural yield was achieved, and the corresponding xylose conversion was close to 100.0%. In addition, the pretreated corncob residue exhibited excellent enzymatic digestibility as the yields of reducing sugar and glucose were 90.7% and 97.0%, respectively, at a high solid loading of 12%. This proposed approach represents an integrated strategy for coproduction of multiple products from agriculture residues.
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