scholarly journals Karakterisasi material mesopori Ni/MCM-41 dan pengaruh penambahan logam nikel terhadap tingkat keasaman material

2019 ◽  
Vol 4 (2) ◽  
pp. 61
Author(s):  
Soenandar Milian Tompunu Tengker ◽  
Jenny Kumajas
Keyword(s):  
Surface Area ◽  
Mesoporous Material ◽  
Gravimetric Method ◽  
Hexagonal Structure ◽  
Nickel Metal ◽  
Exchange Method ◽  
Form Complex ◽  
Morphological Form ◽  
Acidity Level ◽  
Mcm 41

Mesoporous material MCM-41 cannot be used directly as a catalyst, so need to be added metals or nonmetals to create an acidic site. Nickel is a Lewis acid metal because it is able to accept lone pairs of electrons from ligands to form complex compounds. The purpose of this study was to produce mesoporous material Ni/MCM-41 and to see the effect of the addition Nickel metal to the acidity level of mesoporous material Ni/MCM-41.Tthe ion exchange method is used to produce Ni/MCM-41 and the gravimetric method to test the acidity of the material. The MCM-41 used for Ni/MCM-41 synthesis has an x-ray diffraction pattern with a hexagonal structure that is identical with the MOC researchers results. BET results is showed the type IV of the Langmuir adsorption isotherm with a surface area of ​​Ni/MCM-41 material 775.9 m2/g, pore volume 0.81 cc/g and pore radius 15.2 Å. TEM characterization shows the morphological shape of Ni/MCM-41 in the form of hexagonal structure. The acidity test results of Ni/MCM-41 material have a higher acidity level compared to MCM-41. Based on the research data, it can be concluded that Ni/MCM-41 has a morphological form with a hexagonal structure, has a large surface area and has a pore size classified as mesoporous material and has a higher acidity level than the MCM-41 synthesized.

scholarly journals Synthesis of Hydrophobic Mesoporous Material MFS and Its Adsorption Properties of Water Vapor

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Guotao Zhao ◽  
Zhenxiao Zhao ◽  
Junliang Wu ◽  
Daiqi Ye
Keyword(s):  
Water Vapor ◽  
Surface Area ◽  
Mesoporous Material ◽  
High Surface ◽  
Synthesis Method ◽  
Gravimetric Method ◽  
Total Pore Volume ◽  
Adsorption Properties ◽  
Bet Surface Area ◽  
Mcm 41

Fluorine-containing hydrophobic mesoporous material (MFS) with high surface area is successfully synthesized with hydrothermal synthesis method by using a perfluorinated surfactant SURFLON S-386 template. The adsorption properties of water vapor on the synthesized MFS are also investigated by using gravimetric method. Results show that SEM image of the MFS depicted roundish morphology with the average crystal size of 1-2 μm. The BET surface area and total pore volume of the MFS are 865.4 m2 g−1and 0.74 cm3 g−1with a narrow pore size distribution at 4.9 nm. The amount of water vapor on the MFS is about 0.41 mmol g−1at 303 K, which is only 52.6% and 55.4% of MCM-41 and SBA-15 under the similar conditions, separately. The isosteric adsorption heat of water on the MFS is gradually about 27.0–19.8 kJ mol−1, which decreases as the absorbed water vapor amount increases. The value is much smaller than that on MCM-41 and SBA-15. Therefore, the MFS shows more hydrophobic surface properties than the MCM-41 and SBA-15. It may be a kind of good candidate for adsorption of large molecule and catalyst carrier with high moisture resistance.

Optimal Decolorization Efficiency of Reactive Red 3 by Fe-RH-MCM-41 Catalytic Wet Oxidation Coupled with Box-Behnken Design

2013 ◽  
Vol 545 ◽  
pp. 109-114 ◽  
Author(s):  
Kitirote Wantala ◽  
Pongsert Sriprom ◽  
Nusavadee Pojananukij ◽  
Arthit Neramittagapong ◽  
Sutasinee Neramittagapong ◽  
...  
Keyword(s):  
Surface Area ◽  
Hexagonal Lattice ◽  
Hexagonal Structure ◽  
Bet Surface Area ◽  
Molar Ratio ◽  
Wet Oxidation ◽  
Catalytic Wet Oxidation ◽  
Box Behnken Design ◽  
Independent Variables ◽  
Mcm 41

The reactive red 3 was degraded by catalytic wet oxidation process over Fe-RH-MCM-41 prepared by Direct Hydrothermal Technique (DHT) at Si/Fe molar ratio of 10 using silica from rice husk. The extended reaction conditions were studied as a function of reaction temperatures, initial H2O2 concentrations and initial pH of solutions designed by Box-Behnken design (BBD) based on Response Surface Methodology (RSM) to achieve the optimal condition and interaction of independent variables. The characterizations of catalyst were studied by XRD, BET surface area and TEM to explain the morphology of surface and to confirm the hexagonal structure. The results showed the 2theta peak can be indexed to hexagonal lattice that also confirmed by TEM result and surface area about 650 m2/g. All of independent variables showed significant on the degradation of reactive red 3 except for initial H2O2 concentration.

scholarly journals Production of Hydrocarbon (C7-C20) from Hydrocracking of Fatty Acid Methyl Esters on Pd/Al-MCM-41 Catalyst

2017 ◽  
Vol 12 (3) ◽  
pp. 337 ◽  
Author(s):  
Hendro Juwono ◽  
Triyono Triyono ◽  
Sutarno Sutarno ◽  
Endang Tri Wahyuni ◽  
Harmami Harmami ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Surface Area ◽  
Pore Volume ◽  
Fatty Acid Methyl Esters ◽  
Seed Oil ◽  
Methyl Esters ◽  
Hexagonal Structure ◽  
Reaction Engineering ◽  
Acid Methyl ◽  
Mcm 41

The production of hydrocarbon (C7-C20) and alcohol (C11-C19)  from fatty acid methyl esters (FAMEs) compound are produced from the transesterification of the seed oil of the Nyamplung that has been conducted by the catalytic hydrocracking using Al-MCM-41 and Pd2+-impregnated-Al-MCM-41 catalysts. The performance of catalysts were compared by various analysis including the acidity that was determined by pyridine and FTIR, the crystal structure observed by XRD, the surface area and pore volume analyzed by BET/BJH, the surface morphology observed by TEM, the metal on the surface of catalyst observed by XPS and the product of the hydrocracking analyzed by GC-MS. Hexagonal structure of the MCM-41(100) was shown in the 2θ = 3o-5o of the diffractogram. The presence of impregnated Al and Pd observed at the 2θ = 20o and 34o, respectively. The Pd/Al-MCM-41 catalyst was more acidic than Al-MCM-41 catalyst. The surface area and pore volume of the catalyst decreased after the impregnation process. The tendency of catalytic hydrocracking of hydrocarbon produced was indicated that more amount of Palladium have more hydrocarbons aliphatic than alcohol. Copyright © 2017 BCREC Group. All rights reservedReceived: 21st November 2016; Revised: 24th May 2017; Accepted: 25th May 2017; Available online: 27th October 2017; Published regularly: December 2017How to Cite: Juwono, H., Triyono, T., Sutarno, S., Wahyuni, E.T., Harmami, H., Ulfin, I., Kurniawan, F. (2017). Production of Hydrocarbon (C7-C20) from Hydrocracking of Fatty Acid Methyl Esters on Pd/Al-MCM-41 Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 12 (3): 337-342 (doi:10.9767/bcrec.12.3.811.337-342) 

scholarly journals Silvlated MCM-41 Synthesized from RiceHusk

2006 ◽  
Vol 6 (2) ◽  
pp. 91
Author(s):  
N. Ketcome ◽  
N. Grisdanurak
Keyword(s):  
Chemical Modification ◽  
Pore Size ◽  
Surface Structure ◽  
Surface Area ◽  
Aging Time ◽  
Rice Husk ◽  
Mesoporous Material ◽  
Silylating Agent ◽  
Adsorption Of Water ◽  
Mcm 41

Mesoporous material, MCM-41, synthesized from rice husk (RH-MCM-41) was modified by loading silylating agent (either Trimethylchlorosilane (TMCS), Dimethyl- dichlorosilane (DMCS) or Phenyl-trichlorosilane (PTCS)) in different concentration (1-9 %wt), and aging time, varied from I, 6, 9 and 24 hr. Properties of samples were characterized by XRD, Nz adsorption, FfIR, and TPD and adsorption of water, hexane, and toluene. Chemical modification resulted smaller pore size average and less surface area of RH-MCM-41, from 2.9 to 2.2 nm and from 900 to 500 mZ/g, respectively. PTCS could affect RH-MCM-41 surface structure more than other two. Adsorption behavior of modified RH-MCM-41 was also reflected to comparatively higher hydrophobicity.

scholarly journals Optimization of MCM-41 Mesoporous Material Mixed Matrix Polyethersulfone Membrane for Dye Removal

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 414
Author(s):  
Rana J. Kadhim ◽  
Faris H. Al-Ani ◽  
Qusay F. Alsalhy ◽  
Alberto Figoli
Keyword(s):  
Membrane Fouling ◽  
Mesoporous Material ◽  
Optimization Technique ◽  
Operating Conditions ◽  
Mixed Matrix ◽  
Pareto Chart ◽  
Significance Level ◽  
Pes Membrane ◽  
Wasted Energy ◽  
Mcm 41

The aim of this work is the optimization of the operating conditions under which MCM-41-mesoporous material can be incorporated into polyethersulfone (PES)/MCM-41 membranes for nanofiltration (NF) applications. MCM-41 mesoporous material mixed matrix PES membranes have the potential to reduce membrane fouling by organic dye molecules. Process optimization and modeling aim to reduce wasted energy while maintaining high flow during the operation to handle the energy efficiency problems membranes often have. An optimization technique was applied to obtain optimum values for some key parameters in the process to produce a certain amount of flux above the desired values. Response surface methodology (RSM) and analysis of variance (ANOVA) were used as mathematical and statistical analyses to improve the performance of the process on a larger scale. This work investigated the influence of the operating parameters, such as the feed pH values (3–11), MCM-41 content (0–1 wt.%), and the feed dye concentration (10–100 ppm) for each of the two studied dyes, acid black 210 (AB-210) and rose bengal (RB), and their interactions on the PES membrane permeability. The results showed that the PES membrane had the best performance at 64.25 (L·m−2·h−1·bar-1) and 63.16 (L·m−2·h−1·bar-1) for the AB-210 and RB dyes, respectively. An MCM-41 content of nearly 0.8 wt.% in the casting solution, feed dye concentration of 10 ppm for the studied dyes, and feed pH of 3 for the RB dye was found to be the optimal parameters for eliciting the response. The pH had no significant influence on the response for the AB-210 dye, while the pH shows some minor effects on response with the RB dye, and the Pareto chart of the standardized effects on the permeation flux of both dyes using statistically significant at the 5% significance level support these results.

scholarly journals Characterization and Modification of Natural Zeolite and Its Cracking Properties on Petroleum Fraction

2010 ◽  
Vol 1 (1) ◽  
pp. 7-10
Author(s):  
Mukhamad Nurhadi ◽  
Wega Trisunaryanti ◽  
M Utoro Yahya ◽  
Bambang Setiaji
Keyword(s):  
Ion Exchange ◽  
Natural Zeolite ◽  
Zeolite Catalyst ◽  
Nitrate Solution ◽  
Gravimetric Method ◽  
Hydrogen Gas ◽  
Petroleum Fraction ◽  
Ammonia Adsorption ◽  
Exchange Method ◽  
Atomic Adsorption Spectroscopy

Preparation of natural zeolite catalyst consist of dealumination using acid (HF 1% (v/v), HCI 1M), steaming at calcination temperature and both treatments ware carried out. The modification of the zeolite catalyst was done by loading a small amount of chromium (3% b/b) on the zeolite by ion exchange method. Ion exchange was processed by immersing the zeolite in 0.115 M chromium nitrate solution, followed by oxidation with oxygen gas and reduction by hydrogen gas. The characterization of the zeolite catalyst by mean of Si/AI ratio, acidity, metal contents (Na, K, Ca, Fe and Cr) and surface area including pore size distribution were determined by gravimetric method, ammonia adsorption, Atomic Adsorption Spectroscopy (AAS) and nitrogen gas sorption analyzer (NOVA-1000), respectively. The result of characterization showed that dealumination process increased the Si/AI ratio, acidity and decreased the metal content. The result of cracking process showed that modification of the natural zeolite catalyst enhanced the catalysis property, it showed relatively high cracking activity of petroleum fraction and low kokass formation.

The effect of phosphate treatment on nickel dispersion on MCM-41 mesoporous material

2003 ◽  
Vol 20 (2) ◽  
pp. 256-261 ◽  
Author(s):  
Sung Soo Park ◽  
Sang Joon Choe ◽  
Dong Ho Park
Keyword(s):  
Mesoporous Material ◽  
Phosphate Treatment ◽  
Nickel Dispersion ◽  
Mcm 41

Use of Ionic Liquid as Template for Hydrothermal Synthesis of the MCM-41 Mesoporous Material

Silicon ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 289-294 ◽  
Author(s):  
José Arnaldo Santana Costa ◽  
Priscila Vedovello ◽  
Caio Marcio Paranhos
Keyword(s):  
Ionic Liquid ◽  
Hydrothermal Synthesis ◽  
Mesoporous Material ◽  
Mcm 41
Sign in / Sign up

Export Citation Format

Share Document