ACS Applied Materials & Interfaces
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2020
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IF 8.758
Jingjing Wang,Xiaoyan Lian,Qilong Yan,Dayuan Gao,Fengqi Zhao,Kangzhen Xu
An interesting Cu–Co/GO composite with special high organic content was accidentally fabricated for the first time via a one-pot solvothermal method in the mixed solvent of isopropanol and glycerol. The Cu–Co/GO composite was calcined separately in three different atmospheres (air, nitrogen, and argon) and further investigated by a series of characterization techniques. The results indicate that the spinel phase nano-CuCo2O4 composite, nanometal oxides (CuO and CoO), and nanometal mixture of Cu and Co were unexpectedly formed after calcination in air, N2, and Ar atmospheres, respectively, and the possible reaction mechanism was discussed. The specific mass losses of the Cu–Co/GO composite calcined in air, N2, and Ar atmospheres were 28.14 %, 21.68 %, and 23.76 %, respectively. The catalytic decomposition performances of the as-prepared samples for cyclotrimethylenetrinitramine (RDX) and the mixture of nitrocellulose (NC) and RDX (NC + RDX) were investigated and compared via DSC method, and the results demonstrate that Cu–Co/GO composites obviously decrease the thermal decomposition temperature of RDX from 242.3 to 236.5 (before calcination), 238.6 (air), 235.8 (N2), and 228.6 °C (Ar), respectively. Cu–Co/GO(Ar) composite exhibits the best catalytic decomposition performance among all samples, which makes the decomposition temperature of RDX and NC + RDX decrease by 13.7 and 4.9 °C and the apparent activation energy of decomposition for RDX decrease by 110.1 kJ/mol. The enhanced catalytic performance of Cu–Co/GO(Ar) composite could be attributed to the smaller particle size, better crystallinity, and specific well-dispersed metal atoms, whereas the Cu–Co/GO(air) composite after air calcination presents a bad catalytic performance due to the removal of GO.
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DOI
PubMed
高影响因子
FUEL
·
2020
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IF 5.578
Riyang Shu,Rongxuan Li,Biqin Lin,Bowen Luo,Zhipeng Tian
Metal particle size and metal dispersion significantly influence the catalyst activity, and an efficient catalytic upgrade of bio-oil to high-quality liquid fuel is always difficult. Herein, a high dispersed Ru/SiO 2 -ZrO 2 catalyst was prepared by polyol reduction method, which exhibited a high catalytic activity on hydrodeoxygenation (HDO) of the phenolic compounds and pyrolysis lignin-oil. As a model compound, guaiacol had a conversion of 99.9% and a cyclohexane selectivity of 96.7% at the temperature of 240 °C. This polyol Ru/SiO 2 -ZrO 2 catalyst had a good recyclability in the guaiacol HDO. No significant decrease on the catalytic activity was presented after continuous 5 runs, and the conversion kept close to 100% and the selectivity of cyclohexane kept above 88%. Several common phenolic compounds also enabled to be turned into corresponding cycloalkanes efficiently. The high Ru dispersion and the large amount of strong acid sites in the polyol Ru/SiO 2 -ZrO 2 are the main reasons for the good catalytic performances. The synergetic effects between high dispersed metal site and strong acid site lead to a promoted efficiency in the HDO process to form the cycloalkanes. This active catalyst was also applicable to the upgrade of pyrolysis lignin-oil. After reaction, the content of hydrocarbons in the lignin-oil increased from 16.2% to 86.1%, and guaiacols and other oxygenated compounds were almost disappeared. The upgraded lignin-oil has potential to be used as high-quality fuels directly.
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高影响因子
MICROCHEMICAL JOURNAL
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2015
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IF 2.746
Na Wang,Ling He,Xiang Zhao,Stefan Simon
The mostly used drying-oils as binding media in historical artworks of eastern tung-oil and western linseed-oil, poppy-oil, walnut-oil are comparatively identified by on-line methylated pyrolysis–gas chromatography/mass spectrometry (Py–GC/MS). Based on the analysis of un-pigmented and pigmented reference samples after treated by natural aging, hydro-thermal aging and UV aging, respectively, the characteristic pyrolysis products of all drying-oils are classed into mono-carboxylic acids (C6–8, 14, 16, 18, 20), di-carboxylic acids (2C6–12), glycerol, erythritol , 2-tridecanone, 8-hydroxy-octanoic acid, 3-octyl-oxiraneoctanoic acid and 2,6,10-trimethyl-9-undecenoic acid. Both benzene derivative and 9,10-dihydroxy-octadecanoic acid are suggested as the marked components for distinguishing eastern and western drying-oil. The investigated pigments of malachite, cinnabar, azurite and ochre do not show obvious influence on the detection of characteristic pyrolysis products of drying-oil, but they are proved to accelerate the aging and hydrolyzing rate of drying-oil, especially the pigment of cinnabar. The established on-line methylated Py–GC/MS procedure and the summarized data have been successfully applied on the identification of raw tung-oil and boiled tung-oil in historical painting samples collected from Drum Tower (Ming Dynasty), Bell Tower (Ming Dynasty), and Thousand-Buddha Cliff Grotto (Tang Dynasty). It is believed that the established Py–GC/MS procedure is able to provide wide application in archeological research.
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DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2015
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IF 2.679
Hao Li,Shuqian Xia,Meng Wu,Peisheng Ma
Developing value-added chemicals from pyrolysis oil has been gaining increasing attention. Thus effective separation and purification of the pyrolysis oil are important and the phase equilibrium data are essential for the design and simulation of the processes. In this study, isobaric vapour–liquid equilibrium (VLE) for the two binary mixtures (butyl acetate + anisole) and (butyl acetate + guaiacol) have been determined at 101.33 kPa, a knowledge of which is essential for the separation of methoxy aromatic compounds (anisole and guaiacol) from biomass fast pyrolysis oil using butyl acetate as a solvent. All the experimental values were confirmed to be thermodynamically consistent using the van Ness method. The NRTL, UNIQUAC, and Wilson activity coefficient models were applied to regress the experimental values. The calculated results agreed well with the measured values. Furthermore, the results were calculated by the UNIFAC (Do) method (modified UNIFAC model) in which aromatic methoxyl is treated as a group (ACOCH 3 ). The new interaction parameter (ACOCH 3 –CH 3 COO) was obtained and proved to be reliable. Based on the preceding results, a feasible separation process for the ternary mixture (butyl acetate + anisole + guaiacol) has been designed to obtain the required products.
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高影响因子
BIORESOURCE TECHNOLOGY
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2016
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IF 4.917
Yimeng Wang,Jie Wang
The pinewood was pyrolyzed in the first reactor at a heating rate of 10 °C min −1 from room temperature to 700 °C, and the vapor was allowed to be cracked through the second reactor in a temperature range of 450–750 °C without and with HZSM-5. Attempts were made to determine a wide spectrum of gaseous and liquid products, as well as the mass and element partitions to gas, water, bio-oil, coke and char. HZSM-5 showed a preferential deoxygenation effect via the facilitated decarbonylation and decarboxylation with the inhibited dehydration at 550–600 °C. This catalyst also displayed a high selectivity for the formations of aromatic hydrocarbons and olefins by the promoted hydrogen transfer to these products at 550–600 °C. The bio-oil produced with HZSM-5 at 500–600 °C had the yields of 14.5–16.8%, the high heat values of 39.1–42.4 MJ kg −1 , and the energy recoveries of 33–35% (all dry biomass basis).
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DOI
PubMed
高影响因子
FUEL
·
2024
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IF 6.7
Yuchen Jiang,Yuewen Shao,Chao Li,Kang Zhang,Xueming Gao,Lijun Zhang,Shu Zhang,Yi Wang,Xun Hu
Theoretically, any carbonaceous feedstock could be potentially used as a carrier for preparing metal/char composite material. Nonetheless, organics generated from varied feedstocks in pyrolysis might impact distribution of metals in distinct ways. This was investigated herein by microwave pyrolysis of five typical solid wastes (sawdust, pig manure, spirulina, cabbage, and rice) loaded with nickel nitrate at 400 °C and detailed analysis of Ni/char. The results indicated that pig manure contained abundant inorganics (44.2 %), which together with nickel species induced excessive cracking, rendering 18.2 % of carbon content in resulting char (nearly 70.0 % for rice- or sawdust-derived char) and thus little anchoring sites for fixation of nickel species. The in-situ IR characterization of pyrolysis confirmed intensive cracking of the spirulina with high ash content (11.2 %) and unstable organics, which led to a low anchoring sites of Ni. The volatiles from the cabbage of similar property to spirulina also formed less anchoring sites for nickel. In comparison, carbon/oxygen-rich sawdust or rice provided sufficient anchoring sites for nickel, and the dominance of aromatization in pyrolysis resulted in a much higher dispersion of nickel and also a much superior catalytic activity of Ni/char for hydrogenation of vanillin or furfural.
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Shiqian Gao,Min Pan,Jiarui Zhou,YiZhou Shen,Jianhui Wang,Xin He
The magnetic ionic liquid-modified fish-scale biochar (MIL/FSBC) was prepared via microwave-assisted pyrolysis (MWP) processes. The hydroxyapatite (HAP) were efficiently separated from the interior of collagen fibrils with magnetic ionic liquid [C 4 min]FeCl 4 . The synergistic activation of HAP liberation combined with MIL process significantly increased the MWP efficiency of fish scale biomass. The morphology and texture properties of MIL/FSBC magnetic nanoparticles (MNPs) were analyzed using SEM, TEM, XRD, XPS, VSM and BET/BJH. The MIL/FSBC MNPs were employed to extract and enrich the benzophenone (BP-1, BP-3 and BP-12) ultraviolet filters from sludge-amended soil sample using magnetic dispersive solid phase extraction (MDSPE) coupled with microwave assisted extraction (MAE) technique. The important parameters influencing the extraction efficiency of the target analytes were investigated, including the amount of adsorbent, pH, microwave extraction temperature and time, NaCl concentration and desorption conditions. The average relative recoveries of BPs exceeded 90.5% using 20.0 mg of MIL/FSBC for extraction over 20.0 min at 35 °C. The matrix effect ranges from −11.42% to 6.2%, and it is slight at low concentrations. The limits of detection (LODs) and limits of quantification (LOQs) for the calibration curve were in a range of 4.3–14.3 ng/kg and 14.9–47.1 ng/kg, respectively. The monitored stability (79.7–106.3%) in soil samples over 90 days confirmed the environmental persistence of BPs in the soil. The developed method was applied to determine BPs in sludge-amended soil and sediment samples, with acceptable recoveries (84.2–102.6%). The typical chemisorption with a heterogeneous multilayer adsorption mechanism was confirmed using the quasi-secondary kinetic model and the Freundlich adsorption isotherm model. The results confirmed that the proposed method was practicable for the analysis of ultraviolet filters pollutant in actual soil samples.
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高影响因子
Journal of Cleaner Production
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2024
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IF 9.7
Shanshan Shao,Yu Cao,Jiaxin Jiang,Xiaohua Li,Yongbo Yu
In this study, metal-loaded HZSM-5 was prepared with metal ion extracted from the cathode materials of spent lithium batteries (lithium iron phosphate, LFP; lithium nickel-cobalt manganate, NCM) with citric acid for the improved production of light aromatic hydrocarbons by catalytic pyrolysis of rape straw. Because of the dealuminization effect of citric acid on HZSM-5, mesopores were introduced, and the diffusion and conversion of pyrolysis gas over acid sites were improved. After metal loading with acid-leaching solution, the amount of weak and total acids in metal-loaded HZSM-5 increased a lot, which was conducive to the dehydration, deoxygenation, decarbonylation and aromatization of pyrolysis, and the production of monocyclic aromatic hydrocarbons (MAHs). With 0.1 mol/L citric acid for LFP and NCM treatment, the metal-loaded catalyst showed a higher yield of benzene, toluene and xylene (BTX) of 11.10 wt% during catalytic pyrolysis of rape straw. Compared with 0.1-NCM-H5, a higher yield of MAHs was obtained over 0.1-LFP-H5 with a more favorable pore structure and higher amounts of weak and total acid sites. In general, the high-valued utilization of agricultural wastes and spent lithium batteries was realized in this study to produce clean energy.
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2019
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IF 5.589
Yanjun Hu,Wenjing Yu,Haryo Wibowo,Yuanyuan Xia,Yanjun Lu,Mi Yan
This study was aimed at investigating the effect of four types of catalysts on the distribution characteristics of 16 polycyclic-aromatic hydrocarbon (PAHs) in bio-oils from the pyrolysis of dry sewage sludge. The pyrolysis experiments of sewage sludge were conducted in a tubular reactor at the high and low temperatures of 850 °C and 450 °C, respectively. CaO, KCl, Na 2 CO 3 , and Fe 2 O 3 were selected as catalysts for the catalyzed pyrolysis. In the non-catalyzed sludge pyrolysis, PAHs concentrations in bio-oil increased with temperature, reaching a maximum value of 15.25 μg/g at 850 °C. This value was 4.5 times higher than PAHs concentration from the non-catalyzed pyrolysis at 450 °C. With the presence of catalysts at 850 °C, an evident reduction of PAHs concentration was observed for all the bio-oil samples. The added catalysts proved to effectively inhibit PAHs formation in bio-oil and reduce the toxic equivalent quantity (TEQ) of PAHs in the experiment at high temperature. The lowest observed PAHs concentration in bio-oil was 4.23 μg/g, obtained with the use of KCl catalyst. However, an opposite trend was observed for catalyzed pyrolysis at 450 °C. The added catalysts promoted PAHs formation, up to the concentration of 8.89 μg/g with the use of CaO catalyst. Catalyst loading also influenced PAHs concentration and TEQ, with the lowest output found at 20% loading for all catalysts. Bio-oil yields, mass ratio of 16 PAHs concentrated into bio-oil, the TEQ of 16 PAHs and their subtotal group classified by ring number were separately examined to analyze their effects on fractional distribution of the total PAH amount. Overall, the presence of the selected catalysts was found to have the ability to inhibit PAHs production at higher pyrolysis temperature and to promote PAHs production at lower pyrolysis temperature.
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Shanshan Shao,Tianrui Sun,Xiaohua Li,Yifan Wang,Laixin Ma,Zhufeng Liu,Shiliang Wu
Due to the high molecular weight, high viscosity and strong instability of heavy bio-oil from rape straw, it is necessary to explore new high-value utilization methods. Heavy bio-oil based carbon material (HBC) was prepared via carbonization and activation assisted by pyrolysis gas, and the basic Mg-Zr-O catalysts using HBC as the carrier (Mg-Zr-O/HBC) was synthesized for the aldol condensation of cyclopentanone to produce aviation fuel precursor. The effect of activation condition on the physicochemical properties of HBC and Mg-Zr-O/HBC were evaluated, the evolution of gas component before and after activation was explored, and the catalytic performance of Mg-Zr-O/HBC in the aldol condensation of cyclopentanone for the synthesis of aviation fuel was tested. Instead of traditional KOH activation, pyrolysis gas activation was beneficial for the reduced pollution and increased calorific value of the gas, making it an environmentally friendly method. The results showed that the activation of biochar (BOC) was improved with lower pyrolysis gas flow , higher activation temperature and longer activation time. The pore structure of carbon material was significantly improved, and the specific surface area was boosted from 15.25 m 2 /g 3 to 627.61 m 2 /g 3 . Mg-Zr-O was evenly distributed on HBC, and a large number of weak and medium basic sites were found in Mg-Zr-O/HBC, which was quite favorable for the aldol condensation. In the aldol condensation of cyclopentanone, Mg-Zr-O/HBC presented the excellent production of the targeted C10+C15 condensates of 84.95 %, which was comparable to that prepared with KOH as activator. After 8 repeated runs, the yield of the targeted condensates remained at 73.33 %. In general, it provided an environmentally friendly strategy for the preparation of HBC and the high-value utilization of pyrolysis gas assisted by pyrolysis gas for the activation of BOC.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Guo-Li Chen,Hui-Ye Jiang,Yan Jiang,Zhao-Peng Deng,Ying-Ming Xu,Li-Hua Huo,Shan Gao
The efficient and synchronous monitoring of diverse harmful gases by one portable sensor has recently become a hot topic due to the vast majority of reports for only sensing a given gas. Herein, two types of hollow microspheres cross-linked through γ-WO 3 nanosheets were controllably prepared by simple pyrolysis of commercial ammonium metatungstate (AMT). Among, the orange product obtained by air calcination at 400 °C is trace (NH 4 ) 0.33 WO 3 doped γ-WO 3 composite, and has broad mesoporous structure, rich oxygen vacancies and the synergistic catalysis of surface W 6+ Lewis acid. These unique factors help to promote the diffusion of gas molecules, expose more active sites for chemical reaction, increase the conductivity of sensitive material and modulate the state of surface adsorbed oxygen species, which in turn effectively improve its sensitive capability toward diverse noxious gases. The (NH 4 ) 0.33 WO 3 /WO 3 sensor achieves response values of 234 for 5 ppm NO 2 at low 50 °C and 170 for 100 ppm diisopropylamine (DIPA) at 170 °C. Meanwhile, it also displays low detection concentrations, good reversibility and moisture resistance, as well as practical detection for vehicle exhaust and prometryn. This is also the first report of a WO 3 -based sensor that can simultaneously achieve dual-detection of trace NO 2 and DIPA. Moreover, the temperature-tuned dual-response mechanism has also been discussed in detail.
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Juan Luo,Rui Ma,Jiaman Sun,Guojin Gong,Shichang Sun,Haowen Li
This study firstly coupled advanced continuous microwave pyrolysis with CO 2 reforming technology to recover syngas from cow manure and CO 2 . The contribution of CO 2 to syngas, pyrolysis mechanism, and energy balance characteristics were analyzed thoroughly. The results showed that continuous microwave pyrolysis coupled with CO 2 reforming technology has superiorities over other pyrolysis methods in bio-gas generation. The bio-gas yield, syngas content, and heating value of syngas reached the maximum value of 71.02 wt%, 85.70 vol%, and 10.87 MJ/Nm 3 , respectively. CO 2 strengthened pyrolysis and reacted with pyrolysis products to produce high-quality syngas and reduce H 2 S. Due to the limited substances that can react with CO 2 and excessive energy consumption with increasing CO 2 concentration, the utilization efficiencies of CO 2 and energy decreased from 36.31% and 27.27% to 31.16% and 24.24%, respectively. This work provides basic theory and technical support for advanced technology to recover high-quality syngas from biomass with low energy consumption.
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DOI
高影响因子
危险品化学品经营许可证（带存储）