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Tiantian Jiao,Chunshan Li,Maoming Gong,Xulei Zhuang,Suojiang Zhang 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
A new reaction agent (urea) was used to efficiently separate the phenol and cresols from lowtemperaturecoal tar (model oil) through complexing. The effects of contact time, reaction temperature,and initial concentration were investigated. The phenols content of the upper layer was analyzed byusing gas chromatography. The separation mechanism was determined by analyzing the chemical bondof the complex for urea and m-cresol using Fourier transform infrared spectrometer. Finally, urea can berecovered through reaction with diethyl ether, and the phenols removal efficiencies can remain constantafter three cycles.
Novel MoP/HY catalyst for the selective conversion of naphthalene to tetralin
Muhammad Usman,Dan Li,Rauf Razzaq,Muhammad Yaseen,Chunshan Li,Suojiang Zhang 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.23 No.-
MoP catalyst supported on HZSM-5, HBeta and HY were prepared by wet impregnation and temperature programmed reduction (H2-TPR), applied for the conversion of naphthalene to tetralin, and characterized by XRD, SEM, TEM, BET, H2-TPR, and NH3-TPD. Catalytic tests revealed the highest selectivity to tetralin was observed over MoP/HY with a naphthalene conversion of 85% and a tetralin selectivity of 99%. The effect of temperature and liquid hourly space velocity (LHSV) was also studied. Well dispersed and small particles of MoP, reduced pore size and weak acidity of HY contribute to enhanced catalytic activity and selectivity in conversion of naphthalene to tetralin.
Study on preparation of inorganic binder stabilized material with large dosage of phosphogypsum
Sun Qiqi,Tao Liangjing,Li Xin,Xu Wei,Yao Shuo,Li Jinpeng,Ren Qi-Fang,Chen Yue’e,Xu Chunshan,Wu Zilong,Zhu Yuelei,Ding Yi,오원춘 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.6
With the rapid development of the phosphorus chemical industry, a large amount of phosphogypsum (PG) is discharged. The impurities in PG pollute the surrounding soil, the groundwater and the air in the long-term storage. In this paper, PG as the main raw material is used to study the stable material of inorganic binder in the condition of large dosage of PG. With PG and graded gravel as stabilized materials, and cement and fly ash as binder, materials are mixed to determine the influence of PG ratio and the amount of activator on the mixture. The results show that the mechanical strength of the mixture increased first and then decreased with the increase in the proportion of PG replacing graded gravel in the mixture. The activator significantly improves the properties of the material system and makes a significant contribution to the curing of PG. The best ratio of pretreated PG: cement: fly ash: aggregate is 50:6:5:39. The amount of activator added by the external mixing method is 0.3%, which can make the unconfined compressive strength reach 4.1 MPa after 7d. Finally, water-soluble phosphorus leaching experiment is conducted for all the samples. The results show that phosphorus leaching is so little that no secondary pollution of the environment is caused.
Gang Wang,Hui Wang,Chunshan Li,Cuncun Zuo,Zengxi Li,Suojiang Zhang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.55 No.-
One-step synthesis of acrylates from acetates and trioxane via aldol reaction at 623 K–653 K was reported. But proceeding this process at room temperature is still a challenge due to ester activation and trioxane decomposition. Herein, series of acrylates were firstly achieved, with the one-step and in-situ catalytic strategy, from acetates (or propionates) and trioxane at 293 K. Selectivity of product reaches up to 94.4% with a 80.8% yield. 1H NMR confirmed the soft enolization of ester, the decomposition of trioxane was catalyzed by TMSOTf, and the generated ionic liquid has catalytic performance on aldol condensation step.
Chidchon Sararuk,Dan Yang,Guoliang Zhang,Chunshan Li,Suojiang Zhang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.46 No.-
Ethyl acrylate (EA) is synthesized by ethyl acetate (EtOAc) with formaldehyde (FA) through aldolcondensation withfixed-bed reactor, and a series of Ce–P–Cs/g-Al2O3 catalyst was developed. Thecatalysts were characterized with XRD, XPS, SEM-EDS, NH3- and CO2-TPD, BET, and pyridine FTIR. Theinfluence of acidity and basicity on activity was discussed. Catalytic performances were further improvedby the addition of small amounts of Ce. Key reaction parameters, such as amount of metal loading, spacevelocity and reaction temperature, were also optimized. The optimum condition demonstrated amaximum EA yield of 31.38% and 60.03% selectivity toward EA.
Qingtao Wang,Yiqi Xu,Jing Zhou,Longyu Xu,Lu Yu,Dahao Jianga,Chunshan Lu,Zhiyan Pan,Qunfeng Zhang,Xiaonian Li 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.93 No.-
We present here a novel fabrication of highly effective supported Pd catalysts (Pd@S-1@IL) derived fromPd@S-1 core–shell material coated with ionic liquids (ILs), [Prmim][Cl], for the selective hydrogenation ofacetylene. Catalytic testing on Pd@S-1@IL catalyst illustrated a remarkable selectivity towards semihydrogenation(over 90% for ethylene, irrespective of conversion level). Moreover, no indications ofdeactivation were observed after 800 h on stream even under relatively severe conditions. Detailedcharacterization indicated that the selectivity enhancement was ascribed to thefilter effect along withelectronic effect on the adsorption/desorption processes arising from the ionic liquids layer. The stability,which has ranked the top reported values over advanced Pd-based catalysts, is attributed to theconfinement effect of Pd NPs within the supports thus restricting the migration of metals. The fabricationof core–shell architecture combined with the advantages of ionic liquid layer offers a promising guidelinefor efficient catalytic transfer of chemical resource.