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THE HYDROXYLATON OF INACTIVE HYDROCARBONS WITH ACTIVE CARBON SUPPORTED METALLOPORPHYRINS
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作者 Wei Zhong ZHENG Xian Yuan WANG Guang Nian LI 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第1期45-46,共2页
A supported Mn-porphyrin catalyst was prepared by adsorption of Mn-porphyrin on active carbon, and found to be efficient for the hydroxylation of hexane with hydrogen peroxide.
关键词 PP THE HYDROXYLATON OF INactive HYDROcarbonS WITH active carbon supported METALLOPORPHYRINS
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Photocatalytic degradation of L- acid by TiO_2 supported on the activated carbon 被引量:2
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作者 WANG Yu-ping WANG Lian-jun PENG Pan-ying 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2006年第3期562-566,共5页
TiO2 sol was prepared by sol-gel technique with tetrabutyl titanate as precursor. Supported TiO2 catalysts on activated carbon were prepared by soak and sintering method. The aggregation of nano-TiO2 particles can be ... TiO2 sol was prepared by sol-gel technique with tetrabutyl titanate as precursor. Supported TiO2 catalysts on activated carbon were prepared by soak and sintering method. The aggregation of nano-TiO2 particles can be effectively suppressed by added polyethylene glycol (PEG) as a surface modifier. The average particle diameter of TiO2, specific surface area and absorbability of catalyst can be modified. Based on characteristics of the TiO2 photocatalyst with XRD, specific surface area, adsorption valves of methylene blue and the amount of TiO2 supported on the activated carbon, the photocatalytic degradation of L-acid was studied. The effect of the factors, such as pH of the solution, the initial concentration of L-acid on the photocatalytic degradation of L-acid, were studied also. It was found that when the pH of the solution is 1.95, the amount of photocatalyst is 0.5 g, the concentration of the L-acid solution is 1.34×10^3 mol/L and the illumination time is 7 h, the photocatalytic degradation efficiency of L-acid can reach 89,88%, The catalyst was reused 6 times and its degradation efficiency hardly changed. 展开更多
关键词 L-acid activated carbon supported TiO2 PHOTODEGRADATION
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Inactivated properties of activated carbon-supported TiO_2 nanoparticles for bacteria and kinetic study 被引量:8
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作者 LI Youji MA Mingyuan +1 位作者 WANG Xiaohu WANG Xiaohua 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2008年第12期1527-1533,共7页
The activated carbon-supported TiO2 nanoparticles(TiO2/AC)were prepared by a properly controlled sol-gel method.The effects of activated carbons(AC)support on inactivated properties of TiO2 nanoparticles were evaluate... The activated carbon-supported TiO2 nanoparticles(TiO2/AC)were prepared by a properly controlled sol-gel method.The effects of activated carbons(AC)support on inactivated properties of TiO2 nanoparticles were evaluated by photocatalytic inactivation experiments of Escherichia coli.The key factors affecting the inactivation effciency were investigated,including electric power of lamp, temperature,and pH values.The results show that the TiO2/AC composites have high inactivation properties of E.coli in compari... 展开更多
关键词 INactivATION activated carbon-supported TiO2 sol-gel method BACTERIA
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Effect of Activated Carbon as a Support on Metal Dispersion and Activity ofRuthenium Catalyst for Ammonia Synthesis 被引量:3
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作者 ZHENG Xiao-ling ZHANG Shu-juan +3 位作者 LIN Jian-xin XU Jiao-xing FU Wu-jun WEI Ke-mei 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2002年第4期448-452,共5页
Ten kinds of activated carbon from different raw materials were used as supports to prepare ruthenium catalysts. N_2 physisorption and CO chemisorption were carried out to investigate the pore size distribution and th... Ten kinds of activated carbon from different raw materials were used as supports to prepare ruthenium catalysts. N_2 physisorption and CO chemisorption were carried out to investigate the pore size distribution and the ruthenium dispersion of the catalysts. It was found that the Ru dispersion of the catalyst was closely related to not only the texture of carbon support but also the purity of activated carbon. The activities of a series of the carbon-supported barium-promoted Ru catalysts for ammonia synthesis were measured at 425 ℃, 10 0 MPa and 10 000 h -1. The result shows that the same raw material activated carbon, with a high purity, high surface area, large pore volume and reasonable pore size distribution might disperse ruthenium and promoter sufficiently, which activated carbon as support, could be used to manufacture ruthenium catalyst with a high activity for ammonia synthesis. The different raw material activated carbon as the support would greatly influence the catalytic properties of the ruthenium catalyst for ammonia synthesis. For example, with coconut shell carbon(AC1) as the support, the ammonia concentration in the effluent was 13 17% over 4%Ru-BaO/AC1 catalyst, while with the desulfurized coal carbon(AC10) as the support, that in the effluent was only 1 37% over 4%Ru-BaO/AC10 catalyst. 展开更多
关键词 activated carbon RUTHENIUM supported catalyst Ammonia synthesis
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Highly reactive and reusable heterogeneous activated carbons-based palladium catalysts for Suzuki-Miyaura reaction
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作者 Yifan Jiang Bingqi Xie Jisong Zhang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第8期165-172,共8页
Suzuki-Miyaura reaction of aryl halides with phenylboronic acid using a heterogeneous palladium catalyst based on activated carbons(AC) was systematically investigated in this work. Two different reaction modes(batch ... Suzuki-Miyaura reaction of aryl halides with phenylboronic acid using a heterogeneous palladium catalyst based on activated carbons(AC) was systematically investigated in this work. Two different reaction modes(batch procedure and continuous-flow procedure) were used to study the variations of reaction processing. The heterogeneous catalysts presented excellent reactivity and recyclability for iodobenzene and bromobenzene substrates in batch mode, which can be attributed to stabilization of Pd nanoparticles by the thiol and amino groups on the AC supports. However, significant dehalogenation in the reaction mixture and Pd leaching from the heterogeneous catalysts were observed in continuous-flow mode.This unique phenomenon in continuous-flow mode resulted in a dramatic decline in reaction selectivity and durability of heterogeneous catalysts comparing with that of batch mode. In addition, the heterogeneous Pd catalysts with thiol-and amino-modified AC supports exhibited different reactivity and durability in batch and continuous-flow mode owing to the difference of interaction between Pd species and AC supports. 展开更多
关键词 Suzuki-Miyaura reaction Heterogeneous palladium catalysts activated carbon Thiol-and amino-functionalization Catalyst support Packed bed
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Effects of the Different Supports on the Activity and Selectivity of Iron-Cobalt Bimetallic Catalyst for Fischer-Tropsch Synthesis 被引量:3
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作者 Xiangdong Ma Qiwen Sun +2 位作者 Fahai Cao Weiyong Ying Dingye Fang 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2006年第4期335-339,共5页
Silica, alumina, and activated carbon supported iron-cobalt catalysts were prepared by incipient wetness impregnation. These catalysts have been characterized by BET, X-ray diffraction (XRD), and temperature-program... Silica, alumina, and activated carbon supported iron-cobalt catalysts were prepared by incipient wetness impregnation. These catalysts have been characterized by BET, X-ray diffraction (XRD), and temperature-programmed reduction (TPR). Activity and selectivity of iron-cobalt supported on different carriers for CO hydrogenation were studied under the conditions of 1.5 MPa, 493 K, 630 h^-1, and H2/CO ratio of 1.6. The results indicate that the activity, C4 olefin/(C4 olefin+C4 paraffin) ratio, and C5 olefin/(C5 olefin+C5 paraffin) decrease in the order of Fe-Co/SiO2, Fe-Co/AC1, Fe-Co/Al2O3 and Fe- Co/AC2. The activity of Fe-Co/SiO2 reached a maximum. The results of TPR show that the Fe-Co/SiO2 catalyst is to some extent different. XRD patterns show that the Fe-Co/SiO2 catalyst differs significantly from the others; it has two diffraction peaks. The active spinel phase is correlated with the supports. 展开更多
关键词 Fischer-Tropsch synthesis bimetallic catalyst iron COBALT support silica ALUMINA active carbon SYNGAS
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Strengthening decomposition of oxytetracycline in DBD plasma coupling with Fe-Mn oxide-loaded granular activated carbon 被引量:1
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作者 Shoufeng TANG Xue LI +3 位作者 Chen ZHANG Yang LIU Weitao ZHANG Deling YUAN 《Plasma Science and Technology》 SCIE EI CAS CSCD 2019年第2期90-96,共7页
A catalytic approach using a synthesized iron and manganese oxide-supported granular activated carbon(Fe-Mn GAC) under a dielectric barrier discharge(DBD) plasma was investigated to enhance the degradation of oxytetra... A catalytic approach using a synthesized iron and manganese oxide-supported granular activated carbon(Fe-Mn GAC) under a dielectric barrier discharge(DBD) plasma was investigated to enhance the degradation of oxytetracycline(OTC) in water. The prepared Fe-Mn GAC was characterized by x-ray diffraction and scanning electron microscopy, and the results showed that the bimetallic oxides had been successfully spread on the GAC surface. The experimental results showed that the DBD?+?Fe-Mn GAC exhibited better OTC removal efficiency than the sole DBD and DBD?+?virgin GAC systems. Increasing the fabricated catalyst and discharge voltage was favorable to the antibiotic elimination and energy yield in the hybrid process. The coupling process could be elucidated by the ozone decomposition after Fe-Mn GAC addition, and highly hydroxyl and superoxide radicals both play significant roles in the decontamination. The main intermediate products were identified by HPLC-MS to study the mechanism in the collaborative system. 展开更多
关键词 dielectric barrier discharge plasma Iron and MANGANESE OXIDES OXYTETRACYCLINE DECOMPOSITION supported GRANULAR activated carbon
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Study on the Active Phases of Ni-W System Hydrotreating Catalysts
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作者 Shi Yahua, Qu Lianglong, Wu Dingjun, Jin Zeming, Li Dadong Part of the work were done by Xue Yongfang, and Sun Naijian. (Research Institute of Petroleum Processing, Beijing 100083) 《石油学报(石油加工)》 EI CAS CSCD 北大核心 1997年第S1期52-57,共6页
StudyontheActivePhasesofNiWSystemHydrotreatingCatalystsShiYahua,QuLianglong,WuDingjun,JinZeming,LiDadong(R... StudyontheActivePhasesofNiWSystemHydrotreatingCatalystsShiYahua,QuLianglong,WuDingjun,JinZeming,LiDadong(ResearchInstituteo... 展开更多
关键词 HYDROTREATING CATALYST Ni W carbon support active phase
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STUDIES ON THE PREPARATION OF ZINC-CONTAINING ACTIVATED CARBON FIBERS AND THEIR ANTIBACTERIAL ACTIVITY
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作者 CHEN Shuixia LIU Jinrong +1 位作者 ZHANG Xiaoping ZENG Hanmin 《Chinese Journal of Reactive Polymers》 2002年第2期113-117,共5页
Several kinds of activated carbon fibers, using sisal fiber as precursors, were prepared with steam activation or with ZnCl2 activation. Zinc or its compounds were dispersed in them. The antibacterial activities of th... Several kinds of activated carbon fibers, using sisal fiber as precursors, were prepared with steam activation or with ZnCl2 activation. Zinc or its compounds were dispersed in them. The antibacterial activities of these activated carbon fibers were determined and compared. The research results showed that these sisal based activated carbon fibers supporting zinc have stronger antibacterial activity against Escherichia coli and S. aureus. The antibacterial activity is related to the precursors, the pyrolysis temperature, and the zinc content. In addition, small quantity of silver supported on zinc-containing ACFs will greatly enhance the antibacterial activity of ACFs. 展开更多
关键词 activated carbon fiber Zinc support Antibacterial activity
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High activity of a Pt decorated Ni/C nanocatalyst for hydrogen oxidation 被引量:3
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作者 高孝麟 王昱飞 +2 位作者 谢和平 刘涛 储伟 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2017年第2期396-403,共8页
The Pt decorated Ni/C nanocatalysts were prepared for hydrogen oxidation reaction(HOR) in fuel cell.By regulating the contents of Pt and Ni in the catalyst,both the composition and the structure affected the electro... The Pt decorated Ni/C nanocatalysts were prepared for hydrogen oxidation reaction(HOR) in fuel cell.By regulating the contents of Pt and Ni in the catalyst,both the composition and the structure affected the electrochemical catalytic characteristics of the Pt-Ni/C catalysts.When the Pt mass content was 3.1% percent and that of Ni was 13.9% percent,the Pt-Ni/C-3 catalyst exhibited a larger electrochemically active surface area and a higher exchange current density toward HOR than those of pure supported platinum sample.Our study demonstrates a feasible approach for designing the more efficient catalysts with lower content of noble metal for HOR in fuel cell. 展开更多
关键词 Platinum catalyst Galvanic displacement Nickel supported on carbon Hydrogen oxidation reaction Electrochemically active surface
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Synthesis of Polyketone by Copolymerization of Styrene and CO Using Carbon Nanotube-Complex Pd^(2+) Catalyst 被引量:1
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作者 郭锦棠 肖淼 +1 位作者 王海霞 胡光 《Transactions of Tianjin University》 EI CAS 2014年第2期86-90,共5页
The dipping method was devised to deposit Pd onto carbon nanotube as supported catalyst(Pd/CNT) for the copolymerization of carbon monoxide(CO) and styrene(ST) towards the formation of polyketone(PK).The Pd/CNT was ch... The dipping method was devised to deposit Pd onto carbon nanotube as supported catalyst(Pd/CNT) for the copolymerization of carbon monoxide(CO) and styrene(ST) towards the formation of polyketone(PK).The Pd/CNT was characterized by X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD) and high-resolution transmission electron microscopy(HRTEM).The construction and crystallization property of PK were evaluated by Fourier transform infrared spectroscopy(FTIR),13C-nuclear magnetic resonance(NMR) and XRD,respectively.The catalyst showed excellent activity and reusability in promoting the fabrication of PK.It can be recycled 14 times with the highest total catalytic activity of 4 239.64 gPK/(gPd·h) at Pd content of 8.63wt%.The results indicate that the prepared catalyst is effective to catalyze the copolymerization of CO and styrene. 展开更多
关键词 carbon nanotube supported catalyst catalytic activity COPOLYMERIZATION POLYKETONE
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Efficient activation of sulfite for reductive-oxidative degradation of chloramphenicol by carbon-supported cobalt ferrite catalysts 被引量:1
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作者 Yongjie Li Mingjie Huang +2 位作者 Wen-Da Oh Xiaohui Wu Tao Zhou 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第10期106-110,共5页
Activation of(bi)sulfite(S(IV))by metal oxides is strongly limited by low electrons utilization.In this study,two carbon-supported cobalt ferrites spinels(CoFe^(2)O_(4) QDs-GO and CoFe^(2)O_(4) MOFs-CNTs)have been suc... Activation of(bi)sulfite(S(IV))by metal oxides is strongly limited by low electrons utilization.In this study,two carbon-supported cobalt ferrites spinels(CoFe^(2)O_(4) QDs-GO and CoFe^(2)O_(4) MOFs-CNTs)have been successfully synthesized by one-step solvothermal method.It was found that both catalysts could efficiently activate S(IV),with rapid reductive dechlorination and then oxidative degradation of a recalcitrant antibiotic chloramphenicol(CAP).Characterizations revealed that CoFe^(2)O_(4) spinels were tightly coated on the carbon bases(GO and CNTs),with effectiveness of the internal transfer of electrons.O_(2)˙−was identified for the reductive dechlorination of CAP,with simultaneously detection of both•OH and SO_(4)^(˙−)responsible for further oxidative degradation.The sulfur oxygen radical conversion reactions and molecular oxygen activation would occur together upon the carbon-based spinels.Spatial-separated interfacial reductive-oxidation of CAP would occur with dechlorination of CAP by O_(2)^(˙−)on the carbon bases,and oxidative degradation of intermediates by SO_(4)^(˙−/•)OH upon the CoFe^(2)O_(4) catalysts. 展开更多
关键词 Cobalt ferrite spinel Sulfite activation Reductive dechlorination carbon supports Sulfur oxygen radical reactions
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Dechlorination of 2,2',4,4',5,5'-hexachlorobiphenyl by thermal reaction with activated carbon-supported copper or zinc
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作者 Yifei SUN Xin FU +3 位作者 Wei QIAO Wei WANG Tianle ZHU Xinghua LI 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2013年第6期827-832,共6页
Activated carbon (AC)-supported copper or zinc made from ion exchange resin (IRCu-C and IRZn-C) have an increased metal load of 557.3 mg·g^-1 and 502.8 mg·g^-1 compared to those prepared by the tradition... Activated carbon (AC)-supported copper or zinc made from ion exchange resin (IRCu-C and IRZn-C) have an increased metal load of 557.3 mg·g^-1 and 502.8 mg·g^-1 compared to those prepared by the traditional method involving impregnation with AC and copper (II) citrate or zinc citrate solution (LaCu-C and LaZn-C) of 12.9 mg·g^-1 and 46.0 mg·g^-1 respectively. When applied to decompose 2,2',4,4',5,5'-hexachlorobiphenyl at 250 ℃, IRCu-C achieved higher activity of 99.0% decomposition efficiency than LaCu-C of 84.7%, IRZn-C of 90.5% and LaZn-C of 62.7%. When the reaction temperature rose to 350 ℃, all the four kinds of reactants can decompose PCB- 153 with efficiency above 90%. Further, X-ray photoelec- tron spectroscopy characterization of IRCu-C before and after the reaction indicated transformation of 19.1% of Cu atoms into Cu^2+, illustrating that Cu is the active ingredient or electron donor promoting the decomposition of PCB- 153. The mechanism underlying this process differs from a traditional H donor. However, there is no significant change on the surface of IRZn-C before and after the reaction, suggesting that Zn acts as catalyst during the process of PCB-153 decomposition. 展开更多
关键词 polychlorinated biphenyls activated carbon-supported copper or zinc DECHLORINATION electron donor
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碳负载Cs和Cu基催化剂用于1,1,2-三氯乙烷的气相脱氯化氢
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作者 盖星宇 岳玉学 +5 位作者 杨春华 张子龙 蔡天姿 张海丰 王柏林 李小年 《化工学报》 EI CSCD 北大核心 2024年第2期575-583,共9页
采用浸渍法制备了Cs/AC和Cu/AC催化剂,并在1,1,2-三氯乙烷的气相脱氯化氢反应中进行了评价。在浸渍过程中,活性炭表面产生高度分散的Cs物种和少量结晶的Cu物种。Cs/AC催化剂具有优异的催化性能,在573 K、1000 h^(−1)的反应条件下,转化... 采用浸渍法制备了Cs/AC和Cu/AC催化剂,并在1,1,2-三氯乙烷的气相脱氯化氢反应中进行了评价。在浸渍过程中,活性炭表面产生高度分散的Cs物种和少量结晶的Cu物种。Cs/AC催化剂具有优异的催化性能,在573 K、1000 h^(−1)的反应条件下,转化率稳定在86.7%。实验和理论计算表明,CsCl物种促进了1,1,2-三氯乙烷的吸附和活化,从而提高了原料转化率。这项工作为探索高效经济地合成偏二氯乙烯提供了一种很有前景的策略。 展开更多
关键词 偏二氯乙烯 活性炭 催化 1 1 2-三氯乙烷脱氯化氢 催化剂载体
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碳球负载纳米零价铁活化过硫酸盐降解水中恩诺沙星的性能研究
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作者 赵乐依 朱雪强 +1 位作者 刘健 路平 《生态环境学报》 CSCD 北大核心 2024年第5期757-770,共14页
恩诺沙星(ENR)属于氟喹诺酮类抗生素,具有稳定性强、难分解、易富集等特性,常用于水产养殖、畜禽养殖等,其在环境中总体浓度较低,但长期低剂量暴露可能对人体健康和生态环境带来极大风险。采用碳球(CS)负载纳米零价铁(nZVI)活化过硫酸盐... 恩诺沙星(ENR)属于氟喹诺酮类抗生素,具有稳定性强、难分解、易富集等特性,常用于水产养殖、畜禽养殖等,其在环境中总体浓度较低,但长期低剂量暴露可能对人体健康和生态环境带来极大风险。采用碳球(CS)负载纳米零价铁(nZVI)活化过硫酸盐(PS)去除水体中的ENR。应用两步碳热还原法制备了碳球负载纳米零价铁(Fe@C),采用单因素实验研究了Fe@C投加量、PS浓度、ENR初始浓度和pH值对ENR降解的影响及降解动力学,通过自由基及降解产物分析推测了Fe@C活化PS降解ENR的反应机制与降解路径。结果表明,ENR的降解符合准一级动力学,在温度为25℃、Fe@C投加量为0.3 g∙L^(-1)、PS浓度为1 mmol∙L^(-1)、ENR初始质量浓度为10 mg∙L^(-1)、pH值为3的条件下,ENR降解率最高达98.6%。ENR降解率随着腐植酸(HA)、氨氮(NH3-N)、碳酸氢根离子(HCO3-)浓度的升高而降低。氯离子(Cl-)在低浓度时对ENR的降解有微弱的促进作用,高浓度时有抑制作用。自由基淬灭实验表明SO4-∙是ENR降解的主要自由基。根据ENR的降解产物,推测哌嗪环的裂解、喹诺酮环的分解及脱氟为ENR主要降解途径。碳球负载纳米零价铁活化PS高级氧化工艺可作为一种高效去除水中ENR的工艺。 展开更多
关键词 恩诺沙星 碳球负载纳米零价铁 过硫酸盐 降解途径 活化 降解动力学
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CeO_(2)载体在CO_(2)加氢制甲醇中的应用和研究进展
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作者 周运桃 王洪星 +1 位作者 李新刚 崔丽凤 《化工进展》 EI CAS CSCD 北大核心 2024年第5期2723-2738,共16页
随着经济的快速发展,CO_(2)排放导致的温室效应日益严峻,通过与绿氢反应将其转化为甲醇等有价值的化工产品是减少CO_(2)排放、缓解全球气候变暖的有效途径。近年来,CeO_(2)负载金属催化剂在CO_(2)加氢制甲醇反应中得到了广泛关注。本文... 随着经济的快速发展,CO_(2)排放导致的温室效应日益严峻,通过与绿氢反应将其转化为甲醇等有价值的化工产品是减少CO_(2)排放、缓解全球气候变暖的有效途径。近年来,CeO_(2)负载金属催化剂在CO_(2)加氢制甲醇反应中得到了广泛关注。本文主要综述了CeO_(2)表面氧空位和碱性位点、Ce3+/Ce4+可逆氧化还原能力、几何形貌等特性在CO_(2)/H_(2)吸附活化和甲醇形成过程中所起到的重要作用,比较了CeO_(2)与ZrO_(2)、ZnO以及复合金属氧化物等载体在反应中的差异,提出了CeO_(2)载体催化剂在确认活性关键中间体、兼顾CO_(2)转化率和甲醇选择性、提高催化活性与稳定性等方面的不足和挑战,以期为新型CO_(2)加氢制甲醇催化剂的设计提供有益参考。 展开更多
关键词 二氧化碳 加氢 催化剂 CeO_(2)载体 甲醇 活性
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AC@Fe_(3)O_(4)的制备及其对水中乳液的吸附性能研究
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作者 丁文杰 申婧 +2 位作者 董晓娜 杜志平 王淑军 《日用化学工业(中英文)》 CAS 北大核心 2024年第4期376-384,共9页
煤矿液压支架乳液在使用的过程汇入矿井水中,大幅度增加了处理难度。粉末活性炭(AC)具有比表面积大、吸附能力强等优点,可以应用于含乳液矿井水的处理中,但存在吸附后固液分离难以及AC再生回用难的问题。基于此,本研究以AC、FeCl_(3)... 煤矿液压支架乳液在使用的过程汇入矿井水中,大幅度增加了处理难度。粉末活性炭(AC)具有比表面积大、吸附能力强等优点,可以应用于含乳液矿井水的处理中,但存在吸附后固液分离难以及AC再生回用难的问题。基于此,本研究以AC、FeCl_(3)·6H_(2)O、FeCl_(2)·4H_(2)O为原料,通过化学共沉淀法制备了活性炭负载Fe_(3)O_(4)复合材料(AC@Fe_(3)O_(4)),并应用于液压乳液废水的吸附处理。结果表明,磁性活性炭对乳液的吸附在90 min时达到吸附平衡,当乳液的初始体积分数为0.5%,温度为25℃,振荡速度为200 r/min时,对乳液的吸附量为1.07 mL/g。吸附动力学研究表明,磁性活性炭对乳液的吸附更符合伪二级动力学模型,表明其对乳液的吸附主要是化学吸附,Langmuir等温线模型对磁性活性炭吸附乳液的拟合度较高,通过拟合计算得到的理论饱和吸附量为1.51 mL/g,而实验中优化吸附量也达到1.07 mL/g。吸附平衡后分离出的AC@Fe_(3)O_(4)在甲醇中乳液的脱附率可以达到90%以上,吸附剂可以重复利用,经过5次循环仍能保持良好的吸脱附性能,并且在外加磁力的作用下可实现液固分离,回收利用简单方便。 展开更多
关键词 磁性活性炭 液压支架乳液 吸附 循环利用
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活性炭孔径和比表面积对TiO_2/AC光催化性能的影响 被引量:30
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作者 陈玉娟 胡中华 +3 位作者 王晓静 赵国华 刘亚菲 刘巍 《物理化学学报》 SCIE CAS CSCD 北大核心 2008年第9期1589-1596,共8页
采用"同步物理-化学活化法"二次活化商品活性炭,制备不同孔径和比表面积的系列活性炭(AC)载体,以偏钛酸为钛源,利用均匀沉淀法制备TiO2负载型光催化剂(TiO2/AC),用氮吸附、XRD、SEM等方法表征,研究活性炭的孔径和比表面积对Ti... 采用"同步物理-化学活化法"二次活化商品活性炭,制备不同孔径和比表面积的系列活性炭(AC)载体,以偏钛酸为钛源,利用均匀沉淀法制备TiO2负载型光催化剂(TiO2/AC),用氮吸附、XRD、SEM等方法表征,研究活性炭的孔径和比表面积对TiO2/AC性能的影响;并通过降解水溶液中的亚甲基蓝(MB)研究TiO2/AC光催化氧化特性,考察催化剂投加量、不同MB浓度等因素对光催化氧化的影响.结果表明,负载的TiO2粒子粒径为12-20nm,活性炭的比表面积大、平均孔径大有利于TiO2的均匀分散,阻止TiO2晶粒生长,有利于充分发挥TiO2小尺度效应;另外,活性炭吸附和TiO2光解的协同效应使TiO2/AC光催化剂对MB降解的效率显著提高.动力学研究表明,TiO2/AC光催化降解MB反应符合表观一级动力学特征. 展开更多
关键词 负载型TIO2 活性炭载体 孔径 光催化剂 亚甲基蓝
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载铜活性炭吸附分离氢气中的微量CO 被引量:17
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作者 陈鸿雁 涂晋林 施亚钧 《华东理工大学学报(自然科学版)》 CAS CSCD 1995年第1期1-6,共6页
对文题的吸附平衡、吸附及脱附的工艺条件进行了考察。用Lang-muir-Freundlich公式关联了吸附平衡数据。根据吸附的性质,关联了吸附穿透曲线,解释了床层动力学现象。结果表明,利用此技术可将氢气中CO体积含量... 对文题的吸附平衡、吸附及脱附的工艺条件进行了考察。用Lang-muir-Freundlich公式关联了吸附平衡数据。根据吸附的性质,关联了吸附穿透曲线,解释了床层动力学现象。结果表明,利用此技术可将氢气中CO体积含量从2×10 ̄(-6)~16×10 ̄(-6)降至1×10 ̄(-6)以下,吸附剂单位处理量达6×10 ̄(-3)m ̄3/g以上(标准状况下气体体积)。同时,吸附剂再生容易,经120℃处理,即可脱附完全。该吸附剂经多次循环,性能稳定,具有一定工业应用价值。 展开更多
关键词 一氧化碳 吸附 分离 活性炭 氢气 工业气体
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活性炭负载钌基氨合成催化剂的制备和催化活性 被引量:43
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作者 王晓南 朱虹 +1 位作者 夏伟琴 刘化章 《催化学报》 SCIE EI CAS CSCD 北大核心 2000年第3期276-278,共3页
A series of active carbon supported ruthenium based catalysts, promoted by alkali and alkaline earth nitrate, are prepared by impregnation method and with RuCl 3·3H 2O as precursor. Effects of support, promoter a... A series of active carbon supported ruthenium based catalysts, promoted by alkali and alkaline earth nitrate, are prepared by impregnation method and with RuCl 3·3H 2O as precursor. Effects of support, promoter and preparation conditions on catalytic activity are discussed. The catalytic activity is evaluated with a fixed bed micro reactor at lower pressure. The results show that the impregnation sequence affects the catalytic activity obviously. Ba Ru K/C is the preferred impregnation sequence. And effects of nature, producing area and pre treatment of the support on catalytic activity are also examined. Catalytic activity increases with the amount of Ru deposited on the support, it attains maximum when Ru loading is 8%. Optimal molar ratio of promoter to Ru is 10. 展开更多
关键词 活性炭 负载型催化剂 氨合成 制备 催化活性
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