http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Selective hydrogenation of phenol for cyclohexanone: A review
Hui Chen,Jinsheng Sun 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.94 No.-
Cyclohexanone from phenol attractively meets the requirements of green chemistry, through catalyticselective hydrogenation, the prevalent methodology in rapid progress recently. In this background,pathways under this methodology are reviewed herein, including possible cyclohexanone formationmechanisms proposed in those years, as well as the corresponding catalysts, such as noble metal, nonnoblemetal and emerging amorphous alloy and heteropoly acids. Among the common catalysts, Pdbasedcatalysts exhibit excellent performance in both conversion and selectivity. Usually, the conversionand selectivity reached almost 100% after the opportune treatment of the metal and support. Othercatalysts such as Pt, Rh, Ni, etc., only perform well in conversion rather than selectivity and the product ismainly cyclohexanol. Amorphous alloys and heteropoly acids, although still relatively rare comparedwith traditional metal catalysts, are bright in prospects indicated by achievements in thisfield. Thereaction mechanism on some catalysts, indistinct to the community, is still in the way of development toovercome the letdown of catalyst design for higher conversion and selectivity industrially. Afterhorizontal comparison of different catalysts, this article manages to give some advice on possiblemethods contributing to the design of efficient and inexpensive catalytic systems.
Jianrong Li,Jinsheng Chen,Yanke Yu,Chi He 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.25 No.-
The Fe–Mn–Ce/CP catalyst prepared by the incipient-wetness impregnation method was investigated for elemental mercury (Hg0) removal in simulated coal-fired flue gas. The incorporation of Fe could remarkably enhance the SO2-resistance of Fe–Mn–Ce/CP catalyst at low temperature, and the existence of water vapor had negative impact on Hg0 removal efficiency. More than 95% of Hg0 could be removed at 100 8C under the conditions of 60 ppm HCl, 3% O2 (v/v), 5% H2O (v/v) and 400 ppm SO2. Hg-TPD results indicated that Hg0 adsorption amount decreased after the addition of H2O or SO2. The XPS results revealed that the incorporation of Fe could enhance the contents of high valence Mnx+ (i.e., Mn3+/Mn4+) and Ce3+ species in the composite catalysts, which are favorable for the oxidation process of elemental mercury. The surface characteristics were not the primary factor determining the catalytic activity. Overall, the catalytic performance of the Fe–Mn–Ce/CP catalyst was closely related to the Fe3+ state, high ratios of (Mn4+ + Mn3+)/Mn2+ and high content of not fully coordinated cerium species.
Mengchao Ding,Xiaoying Kong,Weiyan Chen,Lei Yan,He Huang,Zunzhou Lv,Peng Jiang,Ali Mu,Congcong Huang,Jinsheng Shi 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.110 No.-
Single cancer starvation therapy (ST) strategy can’t achieve satisfactory anti-tumor effect, mainly due tothe diversified nutritional sources of tumor cells. Herein, CuS@Axitinib-SiO2@2-Deoxy-D-glucose(2-DG)-CaCO3-RGD nanoparticles (CADCR NPs) were prepared for three-pathway blocking for efficient starvationtherapy as well as reinforced photothermal therapy (PTT) and chemodynamic therapy (CDT). AfterCADCR NPs were targeted to tumor cells, CaCO3 was ruptured in the acidic environment, releasingCa2+ to chelate glutamine and cutting off the glutamine metabolic pathway of the tumor. 2-DG was alsoreleased from mesoporous SiO2 and restrained the glycolytic pathway of tumor cells. In addition, underthe thermal stimulus of near-infrared irradiation, axitinib was released from CuS NPs, which inhibited theproliferation of tumor blood vessels, ultimately inhibiting the aerobic respiratory pathway of tumor cells. Interestingly, CADCR NPs also showed potential to reshape the tumor microenvironment (TME) and promotedthe transformation of macrophages from M2 to M1 type, increasing the expression of CD8+ T cellsin the tumor site. In conclusion, CADCR NPs achieve severe tumor starvation by simultaneously interferingwith three energy metabolic pathways, and further enhance tumor treatment with the aid of PTT,CDT, and TME improvement, which exhibits great potential for clinical cancer therapy.
Chi He,Zhengping Hao,Xinyan Zhang,Shaokai Gao,Jinsheng Chen 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.5
Mesoporous silica supported catalysts with highly dispersed Pd particles located in their pore channels were synthesized via a novel and simple two-solvents approach. It is found that the support morphology has significant effect on active phase dispersion. Both the pore diameter and pore length of the silica hosts are critical for the catalytic performances of prepared catalysts. Catalyst with plateletlike morphology (Pd/S-P) shows the highest catalytic activity with 90% toluene conversion at 192 8C. The catalytic performances of the synthesized catalysts are closely correlated with Pd dispersion, CO2desorption capability, pore diameter and pore length of the host materials.
Xuesong Shang,Gongren Hu,Chi He,Jinping Zhao,Fuwang Zhang,Ya Xu,Yunfeng Zhang,Jianrong Li,Jinsheng Chen 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.1
An effective and applicable method for the regeneration of used commercial full-scale honeycomb monolith catalysts in China (V2O5–WO3/TiO2) is firstly reported. The de-ionized water and dilute sulfuric acid solution with a relatively low concentration (pH = 2) are potent reagent to regenerated the catalysts used for about 30,000 h in coal-fired power plant. All samples were systematically characterized by TEM,N2 adsorption/desorption, EDX, FT-IR and XPS techniques. The evaluation results reveal that the activity of the used catalysts can be obviously improved after regeneration processes. Moreover, the regenerated catalysts possess superior activity under different gas hourly space velocity (GHSV), and SO2 oxidation rate is lower than 1% in all cases. The regeneration method can remove the deposits, restore active sites and prevent nanoparticles aggregation as well as active phases leaching. Overall, these processes have promised as effective approaches for industrial V2O5–WO3/TiO2 catalysts regeneration.