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- 저자 : Hongjuan Xie (검색결과 3 건)
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Hongjuan Zhang,Aiqin Gao,Kongliang Xie,Aiqin Hou 한국섬유공학회 2019 Fibers and polymers Vol.20 No.10
The effect of calcium chloride on dyeing property of polyamide 66 based on reactive anthraquinone dyes withdifferent structures were investigated. The relationship of the structure and properties of the reactive anthraquinone dyes wasdiscussed. Calcium chloride could obviously improve the exhaustion and fixation of the reactive dyes on polyamide 66. Thedyes with more sulfonate groups exhibited obviously sensitive to calcium chloride. Compared with the traditional dyeingmethod, three reactive anthraquinone dyes achieved better building up property and color yields by using calcium chloride atpH value of 7.0. Calcium chloride had obvious dyeing acceleration for polyamide 66. The anthraquinone dye withbifunctional groups could achieve higher exhaustion and excellent fastness on polyamide 66. The mechanism of calciumchloride to exert an influence on dyeing property of polyamide 66 was analyzed. This work is of great significance forimproving dyeing performance of reactive dyes on polyamide fiber.
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The mechanism of higher alcohol formation on ZrO2-based catalyst from syngas
Yingquan Wu,Hongjuan Xie,Yongli Kou,Noritatsu Tsubaki,Yizhuo Han,Yisheng Tan 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.3
A chain growth scheme for the synthesis of alcohols from carbon monoxide and hydrogen is proposedbased on the chemical enrichment method on ZrO2-based catalyst. Methanol addition has no obvious effect on theSTY of C2+ alcohols, indicating that COH→CCOH is a slow initial growth step. Addition of ethanol and propanols canenhance the STY of isobutanol, especially n-propanol, revealing that n-propanol is largely the precursor of isobutanol. Results of large alcohols addition further reveal the relationship between small alcohols and large alcohols of formation. Also, addition of aldehydes has a similar effect on the formation of higher alcohols, indicating that alcohols existin the form of aldehydes before desorption. Anisole are introduced into syngas for confirmation of predicted intermediatesand the result indicates that formyl species is participated both in the formation of methanol and higher alcohols. Reaction temperature has a significant effect on the chain growth of alcohols synthesis. Under low temperature,chain growth occurs with CO insertion and alcohols are linear products. Isobutanol appears and becomes the mainproduct during C2+ alcohols undergo an aldo-condensation reaction at high temperature.
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Qingde Zhang,Yisheng Tan,Caihong Yang,Hongjuan Xie 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.3
The conversion of syngas to aromatics via dimethyl ether was investigated over MnCl2 modified HZSM-5zeolites. The results demonstrated that 2%MnCl2 modified HZSM-5 (SiO2/Al2O3 = 38) exhibited higher pxylene selectivity than other catalysts and further decreased 1,2,4,5-tetramethylbenzene selectivity. The CO conversion was obviously increased after 5%MnCl2 modification to HZSM-5. The catalysts were characterized by XRD, BET, XPS, FT-IR, NH3-TPD, SEM, element analysis and O2-TPO. The loading amount of MnCl2 affected the adsorption and reaction of DME molecules on zeolites. Appropriate amount of MnCl2 introduction could adjust the acidity and pore volume of HZSM-5 to increase p-xylene selectivity and CO conversion.
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