JOURNAL OF CATALYSIS
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2024
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IF 6.5
Qidong Hou,Yifan Nie,Xiaoran Zhang,Ruite Lai,Xinyu Bai,Chao Xie,Hengli Qian,Guanjie Yu,Tianliang Xia,Yao Tang,Chengxu Wang,Fei Qu,Haixin Guo,Meiting Ju
The conversion of biomass-derived carbohydrates to 5-ethoxymethylfurfural (EMF) is a fascinating reaction with 100% carbon atom utilization. Although effective conversion of 5-hydroxymethylfurfural (HMF) and fructose to EMF have been achieved, the direct conversion of glucose only gave low EMF yields. Herein, we reveal that the combinations of common Lewis acid with Brønsted acid in ethanol universally catalyze rapid etherification of glucose to intractable ethyl glucoside (EGL), as impedes the further conversion toward the desired products. The synergy of large-pore tin phosphate (SnPO) bearing strong Lewis acidic sites with acidic ionic liquid 1-(4-sulfobutyl)-3-methylimidazolium chloride (BSO 3 HMIMCl) enable tandem catalytic conversion of glucose, cellobiose and starch to EMF with record yields (61.7%, 61.8% and 55.7%, respectively), far exceeding previous reports. This transformation probably occurs via multiple parallel pathways, where water molecules generated by dehydration cooperate with acid and Cl - to hydrolyze EGL back to glucose, thus forming a positive feedback on EMF production.
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
MATERIALS CHEMISTRY AND PHYSICS
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2016
·
IF 2.101
Shunyu Han,Zheng Wang,Longyue Meng,Nanzhe Jiang
Mesoporous ZSM-5 zeolites were synthesized by using hydrophilic carbon black as a hard template. Hydrophobic carbon black was oxidized with sodium hypochlorite solution then dispersed into the synthetic precursor, and hydrothermally treated by omitting the evaporation process. The samples were characterized by SEM, TEM, XRD , nitrogen adsorption/desorption and NH 3 -TPD measurements. As a result, mesoporous ZSM-5 zeolites were obtained in the morphology of single crystal like aggregates (about ∼2 μm) with intra-mesopores in the range of 5–18 nm. Textural properties and acidity of mesoporous ZSM-5 zeolites were varied by adjusting the amount of carbon black used. In the toluene disproportionation, mesoporous ZSM-5 templated by hydrophilic carbon black showed more active in toluene conversion and more selective to the para -xylene than conventional zeolite, and even comparable to the commercial zeolite catalyst.
研究领域:
材料科学
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催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yan Wang,Kangqi Cao,Wenlong Sun,Xiangxi Lin,Jianwei Wang,Jessica Villarreal,Longzhi Li
Microwave catalytic pyrolysis of lignin is one of emerging technologies for efficiently converting lignin into fuels and chemicals. Molecular sieves (HZSM-5) are widely used as carriers to load metallic components for biomass pyrolysis but often encounter challenges such as high diffusion resistance and insufficient acidity of acidic sites. Traditionally, HZSM-5 is directly modified to enhance the activity of the acidic sites, but this modification is ineffective in improving the metallic components’ activity. Instead, we made nitrogen doping on Fe and then supported on HZSM-5 to construct Fe-N 25 /HZSM-5 catalysts for microwave catalytic pyrolysis of lignin. The N-doped Fe has the effect of “killing two birds with one stone” on enhancing the catalytic activity. The characterization results indicated that N replaced C of the graphitic carbon network to form carbon nitride structure, and further combined with Fe to generate Fe-N bonds, improving the electronegativity of the metallic component. Besides, the loading of N-doped Fe increased the acidity of the catalyst. The utilization of 1.00Fe-N 25 /HZSM-5 obtained the greatest bio-gas yield (35.2 wt%), a hydrogen yield of 27.8 mL/min, bio-oil yield (36.4 wt%) and phenol selectivity of 46.2 %. The likely pathway of microwave catalytic pyrolysis on Fe-N 25 /HZSM-5 was proposed through DFT calculation, using guaiacol as a model compound. The results suggested that N-doped Fe on HZSM-5 8 T tended to break the side-chain methoxy during pyrolysis of guaiacol, with energy barrier of 0.14 eV. This paper provides a promising strategy for modification of microwave pyrolysis catalysts.
研究领域:
能源化学
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催化材料
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产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
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2025
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IF 4.1
Jia Yu,Liang Xuanyu,Tao Hongge,Chen Binglin,He Chao,Jiao Youzhou,Xu Guizhuan
5-Hydroxymethylfurfural (HMF) is an important platform compound that can be used to synthesize drugs, fine chemicals, fuels, and biodegradable plastics. Synthesis of HMF from cellulose is a key step in the production of high-value-added chemicals and fuels from renewable cellulosic biomass. Herein, a cheap way to produce HMF from cellulose was found in this study. Combination of inexpensive metal salts and inorganic acids shows exciting catalytic efficiency in tetrahydrofuran (THF)/H 2 O system. In this article, the effects of key factors such as water/organic solvent ratio, metal salt type, and concentration on the synthesis of HMF from cellulose were investigated. A maximum HMF yield of 46.5% was obtained with high substrate loading (50 g/L) when H 2 SO 4 and Al 2 (SO 4 ) 3 was used as mixed acid catalysts. Reaction kinetics experiments revealed that combination of H 2 SO 4 and Al 2 (SO 4 ) 3 could effectively reduce the activation energy of cellulose hydrolysis, glucose isomerization, and fructose dehydration compared to the single H 2 SO 4 and single Al 2 (SO 4 ) 3 system. Fortunately, the purity of HMF after separation and purification was up to 98.3%, and both the solvent and the extractant can be recycled. A promising strategy is provided for HMF production from cellulose over simple catalysts.
研究领域:
生物化学
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可再生资源化工
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产品关联
DOI
高影响因子
Plants-Basel
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2025
·Vol. 14
·期 9
·1354
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IF 4.1
Guoying Yuan,Dan Wang,Chaoguang Yu,Jianfeng Hua,Yunlong Yin,Tingting Chen
DNA methylation plays a crucial role in regulating the developmental processes of plants. Particularly, it is closely associated with the development of embryogenic cells (EC) and somatic embryos (SE). In this study, we investigated the effects of 5-azaCytidine (5-azaC) treatment on somatic embryogenesis proliferation and maturation ofTaxodiumhybrid ‘zhongshanshan’. The results showed that the callus proliferation was inhibited when the concentration of 5-azaC exceeded 30 μM, while treatment with 5 μM 5-azaC improved the maturation rate and expedited the process of SE formation. It was also noted that 5-azaC influenced somatic embryogenesis during the second week of embryo induction, substantially enhancing the maturation rate of somatic embryos and the germination rate ofTaxodiumhybrid ‘zhongshanshan’. Furthermore, the analysis revealed that treatment with 5-azaC resulted in elevated levels of H2O2, SOD, POD, and AsA during the cotyledonary embryo period inTaxodiumhybrid ‘zhongshanshan’, indicating its potential to promote somatic embryogenesis by regulating redox homeostasis. This study concluded that 5-azaC could improve the efficiency of somatic embryogenesis inTaxodiumhybrid ‘zhongshanshan’, as well as provide a solid foundation for investigating the effects of 5-azaC on somatic embryogenesis in other conifer species.
研究领域:
植物学
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遗传学
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发育生物学
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产品关联
DOI
PubMed
高影响因子
BioEnergy Research
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2013
·Vol. 6
·期 4
·1173-1182
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IF 4.25
Shao Shanshan,Zhang Huiyan,Xiao Rui,Shen Dekui,Zheng Jian
The conversion of three major biomass derivates was conducted in a quartz tubular fixed bed reactor over a ZSM-5 catalyst. As the model compounds of polyols, saturated furans and unsaturated furans, ethylene glycol (EG), tetrahydrofuran (THF) and furan were pyrolyzed to find out the influence of chemical structure on the catalytic characteristics. The effect of pyrolysis temperature (400 ∼ 650 °C), weight hourly space velocity (2.9 ∼ 15.5 h −1 ) and partial pressure (2.12 ∼ 20.49 Torr) on the feed conversion, product yield and selectivity were investigated. The hydrogen to carbon effective ratio (H/C eff ) was referred to, to analyze the capacity of biomass derivates being converted to chemicals (olefins and aromatics). The results showed that the existence of rings and C=C had great effect on the catalytic characteristics. The conversion of furan was much lower (mainly less than 60 %) than that of EG and TH,F which were close to 100 %. It was also found that the chemical yield of THF was slightly more than that of EG, which can be attributed to its relative higher H/C eff of 1.5. Furan produced the highest coke yield, which was more than 15 %, whereas that of EG and THF was only around 5 %. The serious coking of furan led to the lowest chemical yield, which was less than 35 %. This study paves a way for the mechanism study on catalytic characteristics of biomass-derived feedstocks over zeolite catalysts.
研究领域:
能源科学
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催化化学
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产品关联
DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 128
·106053-106060
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IF 3.84
Jie Wang,Ting Qu,Minsi Liang,Zhenbo Zhao
In this work, we investigated the dehydration of fructose into 5-hydroxymethylfurfural using solid catalysts with microwave assistance in dimethyl sulfoxide. Five kinds of solid catalyst ZrO2, WOx/ZrO2, MoOx/ZrO2, SO42−/WOx–ZrO2 and SO42−/MoOx–ZrO2 were prepared and characterized by XRD, UV-DRS, FTIR, XPS, TEM, TPD, BET, and Raman and the surface acid amount was obtained by combining pyridine adsorption and UV spectrometry. The SO42−/WOx–ZrO2 catalyst was found be the most active catalyst, and a fructose conversion of 95.80% with 83.90% 5-HMF yield was obtained at 150 °C in a relatively short reaction time of 5 min. The value of the activation energy was comparable with previous values reported in the literature, implying that SO42−/WOx–ZrO2 was efficient for the dehydration of fructose to 5-HMF and that microwave radiation heating had a remarkable accelerating effect on the fructose conversion.
研究领域:
化学工程
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Jundong Xu,Yunfeng Guo,Tingting Huang,Yu Fan
This article proposes a novel decamethonium bromide-assisted method for modulating the size of supported metal nanoparticles in Pd/mesoporous HZSM-5 hydrodesulfurization (HDS) catalysts. The proposed approach significantly promotes the dispersion of supported palladium nanoparticles by bridging and anchoring the palladium precursor onto the surface of mesoporous HZSM-5 as well as restraining the subsequent aggregation of palladium nanoparticles in calcination. The as-prepared catalyst possessed higher 4,6-dimethyldibenzothiophene HDS activity than its counterpart that was prepared via impregnation due to its smaller Pd nanoparticles, higher Pd dispersion and higher content of Pd 0 species. This strategy provides a simple pathway for preparing supported metal nanoparticles with high dispersion.
研究领域:
催化化学
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材料科学
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能源化工
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
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2016
·Vol. 62
·期 12
·4403-4417
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IF 2.98
Ye Su,Ganggang Chang,Zhiguo Zhang,Huabin Xing,Baogen Su,Qiwei Yang,Qilong Ren,Yiwen Yang,Zongbi Bao
Glucose conversion to 5-hydroxymethylfurfural (HMF) generally undergoes catalytic isomerization reaction by Lewis acids followed by the catalytical dehydration to HMF with Brönsted acid. In this work, a sulfonic acid functionalized metal-organic framework MIL-101(Cr)-SO 3 H containing both Lewis acid and Brönsted acid sites, was examined as the catalyst for γ-valerolactone-mediated cascade reaction of glucose dehydration into HMF. Under the optimal reaction conditions, the batch heterogeneous reaction gave a HMF yield of 44.9% and selectivity of 45.8%. Reaction kinetics suggested that the glucose isomerization in GVL with 10 wt % water follows the second-order kinetics with an apparent activation energy of 100.9 kJ mol −1 . Continuous reaction in the fixed-bed reactor showed that the catalyst is highly stable and able to provide a steady HMF yield. This work presents a sustainable and green process for catalytic dehydration of biomass-derived carbohydrate to HMF with a bifunctional metal-organic framework. © 2016 American Institute of Chemical Engineers AIChE J , 62: 4403–4417, 2016
研究领域:
化学工程
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生物质能
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
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2014
·Vol. 6
·期 3
·728-732
·
IF 5.044
Hongliang Wang,Qingqiang Kong,Yingxiong Wang,Tiansheng Deng,Chengmeng Chen,Xianglin Hou,Yulei Zhu
Graphical GO-ing all the way: Graphene oxide is demonstrated to be a green heterogeneous catalyst for the selective dehydration of fructose into 5-hydroxymethylfurfural (HMF) in a cost efficient and environmentally benign isopropanol-mediated solvent system. A small number of sulfonic groups with the synergic effect of oxygen-containing groups (alcohols, epoxides, carboxylates) make graphene oxide an efficient acid catalyst. The design of green heterogeneous catalysts for the efficient conversion of biomass into platform molecules is a key aim of sustainable chemistry. Graphene oxide prepared from Hummers oxidation of graphite was proven to be a green and efficient carbocatalyst for the dehydration of fructose into 5-hydroxymethylfurfural (HMF) in some three-carbon and four-carbon alcohol mediated solvent systems. HMF was obtained in up to 87 % yield in 90 vol % isopropanol-mediated DMSO solvent. Some control experiments and analytical data showed that a small number of sulfonic groups and abundance of oxygen-containing groups (alcohols, epoxides, carboxylates) have an important synergic effect in maintaining the high performance of graphene oxide.
研究领域:
化学工程
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可持续化学
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生物质转化
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Shenghan Gao,Yuting Luo,Bo Li,Wen Cai,Huai Liu,Rui Zhang,Wenlong Jia,Lincai Peng
Modulating the electronic environment of single-atom metal catalysts is a promising yet challenging strategy to optimize their catalytic performance. Herein, electron-rich Ru single atoms were successfully confined within a CoOx matrix (Ru0.6CoOx) through a simple manual grinding-reduction strategy. The resulting Ru0.6CoOx catalyst demonstrated exceptional catalytic activity for the hydrogenolysis of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF), affording a nearly quantitative DMF yield with an impressive DMF productivity of 210.2 molDMF·mol–1Ru·h–1 at 160 °C. This productivity outperforms most of the noble metal-based catalysts for DMF production. Notably, Ru0.6CoOx also enabled the efficient conversion of HMF to DMF at a low reaction temperature of 120 °C or using a concentrated HMF solution (up to 20 wt %). Experimental studies combined with density functional theory calculations (DFT) revealed that the electronic interaction between the Ru species and CoOx generates electron-rich Ru single atoms, which serve as active sites to boost the H2 activation. Furthermore, the introduction of single Ru atoms was shown to increase the acidity of Ru0.6CoOx, thereby facilitating the cleavage of the C–OH bond during HMF hydrogenolysis. The boosted H2 activation ability and improved acidity of Ru0.6CoOx contribute significantly to its outstanding catalytic performance. This work provides valuable insights into the preparation of electron-rich single-atom metal catalysts for the catalytic hydrodeoxygenation of biomass-derived chemicals.
研究领域:
催化化学
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材料科学
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化学工程
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生物质转化
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密度泛函理论（DFT）
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
·
IF 5.876
Hao Zhang,Guang-Ren Qian,Hong Liu
Alumina composites containing microporous ZSM-5 (Z-5) and mesoporous ZSM-5 (MZ-5), corresponding to x ZA and x MZA, were developed by incorporating Z-5 and MZ-5 into γ - Al 2 O 3 , respectively. The two series of NiMoS/ x MZA and NiMoS/ x ZA catalysts were prepared with these two composites as supports, respectively, and were used for the simultaneous hydrodesulfurization (HDS) of thiophene (T) and benzothiophene (BT). The results show that NiMoS/ x MZA series catalysts exhibit higher HDS activity than that of NiMoS/ x ZA and NiMoS/γ-Al 2 O 3 , and the HDS activity of NiMoS/ x MZA catalysts increases with the increase of MZ-5. The high HDS activity can be mainly attributed to the synergistic effects of the efficient diffusing pore channels, high dispersion of type II NiMoS phases, suitable acidity, and moderate Mo-support interaction. Moreover, the product distribution of HDS shows that the NiMoS/ x MZA catalysts possess the dominant direct desulfurization (DDS) selectivity and the selectivity increases with the increase of MZ-5 content due to more corner sites and suitable Brønsted (B) acid sites, whereas the NiMoS/ x ZA catalysts perform more excellent hydrogenation (HYD) selectivity, and the selectivity increases with the increase of Z-5 content because of the existence of more edge sites. Based on this, the possible reaction network for T and BT hydrodesulfurization over the catalysts are proposed.
研究领域:
催化化学
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能源化工
✓ 已验证
DOI
高影响因子
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