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| 1 | 多级孔分子筛的制备与催化应用显示文摘分子筛研究的热点问题之一是如何减小微孔扩散阻力对传质带来的不利影响,以提高催化剂的利用效率。通过引入介孔,实现多级孔分子筛材料的设计是解决上述问题的一种有效方法。本文介绍了多级孔分子筛材料提高反应扩散效率的理论依据以及国内外多级孔分子筛材料制备方面的研究进展。主要包含'破坏性'方法(destructive methods)和'建设性'方法(constructive methods)的原理,从水热稳定性、酸性、操作性以及可放大性分析了各种合成方法的优势和不足。本文还介绍了多级孔分子筛在催化反应中的若干应用实例,重点介绍了多级孔材料在催化裂化和加氢反应中的应用进展,表明多级孔分子筛可以提高选择性以及转化率。开发适宜酸性以及水热稳定性的微孔-介孔分子筛,同时兼顾低成本、低污染以及易操作性的合成技术是将来研究的重点,同时应建立多级孔分子筛催化性能与结构的关系,加深对多级孔分子筛的认识。 | 彭鹏 张占全 王有和 Fazle Subhan 阎子峰 | 2013 | 化学进展2013，25，12： | 26 |
| 2 | 两段变温法水热合成多级孔ZSM-5分子筛及其催化裂化性能(英文)显示文摘以四丙基氢氧化铵(TPAOH)为单一模板剂,采用低温老化、高温晶化2段变温法合成出了球状多级孔ZSM-5分子筛。利用XRD、FT-IR、NH_3-TPD、SEM、TEM以及氮气吸-脱附等测试对合成样品进行了表征。结果表明:直径约为2μm左右的球状多级孔ZSM-5分子筛颗粒内的晶间介孔和大孔主要由棒状纳米晶堆积而成的,该产品具有较大的比表面积和介孔孔容。同常规水热法一步合成的微孔ZSM-5分子筛相比,2段变温法合成的多级孔ZSM-5分子筛具有更高的B酸/L酸比例(C_(BP)/C_(LP))、强酸/弱酸比例(C_s/C_w)以及活性位可接近性指数(ACI)。催化裂化评价结果显示,得益于活性位可接近性指数等指标的提高,球状多级孔ZSM-5分子筛比常规合成的微孔ZSM-5分子筛具有更高的转化率和丙烯收率等优异的催化性能。 | 王有和 孙洪满 彭鹏 白鹏 阎子峰 Subhan Fazle 季生福 | 2018 | 无机化学学报2018，34，5： | 3 |
| 3 | Suitable energy platform significantly improves charge separation of g-C3N4 for CO2 reduction and pollutant oxidation under visible-light显示文摘The photocatalytic activities of g-C3N4 can be significantly improved by increasing life time of the photogenerated charges. Here, in this work we introduced TiO2 as proper energy platform to accept the photogenerated electrons from g-C3N4 during photocatalysis. The nanophotocatalysts formed from the combination of a suitable amount of TiO2 nanoparticles and g-C3N4 nanosheets showed 8.75 and 4.22% enhancement in photocatalytic activities for CO2 reduction and 2-chlorophenol(2-CP) degradation under visible light illumination as compared to bare g-C3N4. Based on the surface photovoltage spectra, photoluminescence spectra and examination of formed hydroxyl radicals, it was confirmed that these enhanced photoactivities were attributed to the much-improved charge separation via the electron transfer from g-C3N4 to TiO2. From trapping experiments,it was found that hydroxyl radicals were the major species involved in the photocatalytic degradation of 2-CP.This study is helpful to synthesize efficient photocatalysts to cope with energy and environmental issues. | Amir Zada Nauman Ali Fazle Subhan Natasha Anwar Muhammad Ishaq Ali Shah Muhammad Ateeq Zahid Hussain Khair Zaman Momin Khan | 2019 | Progress in Natural Science:Materials International2019，29，2： | 1 |
| 4 | Production of ultra-low-sulfur gasoline: An equilibrium and kinetic analysis on adsorption of sulfur compounds over Ni/MMS sorbents显示文摘 | Fazle Subhan B.S. Liu Q.L. Zhang W.S. Wang | 2012 | Journal of Hazardous Materials2012，，： | 1 |
| 5 | Upgradation of Heavy Crude Oil Via Hydrodynamic Cavitation Through Variations in Asphaltenes显示文摘In this work,Saudi heavy crude oil(SHCO)was upgraded by the hydrodynamic cavitation technique.The collapse of cavitation bubbles instantly produces extreme conditions such as high temperature,pressure,and jet flow and strong shear forces,which can play a significant role in the upgradation process.The results revealed that the viscosity and Conradson carbon residue of SHCO decreased from 13.61 to 7.22 mm^(2)/s and from 7.16%to 6.48%,respectively.True boiling point distillation findings showed that the vacuum residue(VR)decreased by 1%.Atmospheric-pressure photoionization Fourier-transform ion cyclotron resonance mass spectrometry,X-ray diffraction,dynamic light scattering,Fourier-transform infrared spectroscopy,and scanning electron microscopy were employed to characterize the molecular composition,crystalline structure,asphaltene aggregate particle size distribution,functional groups,and morphology,respectively,to understand the effects of hydrodynamic cavitation on asphaltenes.The obtained results demonstrate that hydrodynamic cavitation upgradation reduced the interaction forces between the asphaltene molecules,weakening the crystalline structure of the asphaltene aggregates,reducing the degree of association of the aromatic compounds in SHCO and asphaltenes,and decreasing the average particle size.The delayed coking properties of the VR were further investigated,and the cavitation treatment was found to decrease the coke yield by 1.85%and increase the liquid and gas yields by 1.52%and 0.33%,respectively.Hence,hydrodynamic cavitation can effectively enhance the processing performance of crude oil by improving the properties and structural characteristics of asphaltenes. | Li Kang Han Haibo Lei Jie Wang Youhe Li Dekun Mark J.Rood Fazle Subhan Yan Zifeng | 2022 | China Petroleum Processing & Petrochemical Technology2022，24，2： | 0 |
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