scholarly journals The Effect of HNO3 and/or NaOH Treatments on Characteristics of Mordenite

2021 ◽  
Author(s):  
Wega Trisunaryanti ◽  
Karna Wijaya ◽  
Desi Suryani ◽  
Uswatul Chasanah
Keyword(s):  
Gas Chromatography ◽  
Catalytic Activity ◽  
Inductively Coupled Plasma ◽  
Gas Flow ◽  
Liquid Fraction ◽  
Weight Ratio ◽  
X Ray Diffraction ◽  
Average Pore ◽  
Inductively Coupled ◽  
Liquid Products

Modification of mordenite had been performed by HNO3 and/or NaOH treatments and used as a catalyst in the hydrotreating of pyrolyzed α-cellulose. The Si/Al ratio of mordenites was analyzed by Inductively Coupled Plasma (ICP), the acidity was gravimetrically determined using ammonium vapor adsorption, the crystallinity was identified by X-ray Diffraction (XRD), and pore characters of mordenites (BHM, BAM0.1, and BAM0.5) were analyzed using Gas Sorption Analyzed (GSA). Catalytic activity and selectivity of the mordenites were evaluated in the hydrotreating of pyrolyzed α-cellulose under 20 mL minute−1 H2 gas flow at 450 °C for 2 h with the weight ratio of catalyst:feed was 1:60. The liquid products were analyzed using Gas Chromatography-Mass Spectrometer (GC–MS). The acidity of mordenites decreased along with the increase of Si/Al rasio, except for the AM0.1 mordenite. The average pore diameter of BHM, BAM0.1 and BAM0.5 was 2.96; 3.34 and 4.53 nm, respectively. The BAM0.1 showed the highest catalytic activity in producing liquid fraction (64.04 wt%). The BAM0.5 showed the highest catalytic selectivity towards biofuels, i.e. 1-pentene 0.44 (wt%); 2-heptyne 2.75 (wt%) and 1-propanol 3.05 (wt%) from the hydrotreating process of pyrolyzed α-cellulose.

scholarly journals Modification of Mordenite Characters by H2C2O4 and/or NaOH Treatments and Its Catalytic Activity Test in Hydrotreating of Pyrolyzed α-Cellulose

2021 ◽  
Vol 16 (1) ◽  
pp. 9-21
Author(s):  
Triyono Triyono ◽  
Wega Trisunaryanti ◽  
Yessi Wydia Putri ◽  
Dyah Ayu Fatmawati ◽  
Uswatul Chasanah
Keyword(s):  
Catalytic Activity ◽  
Gas Flow ◽  
Pore Diameter ◽  
Liquid Product ◽  
Weight Ratio ◽  
Average Pore ◽  
Activity Test ◽  
Liquid Products ◽  
Stainless Steel Reactor ◽  
Open Access Article

The research about modification of mordenite characteristics has been performed by H2C2O4 and/or NaOH treatments and catalytic activity tests in hydrotreating of pyrolyzed a-cellulose. Commercial mordenite (HSZ-604OA) as mordenite control (HM) immersed in 0.05, 0.5, and 1.0 M H2C2O4 at 70 °C for three hours resulting in HM-0.05, HM-0.5, and HM-1. The four mordenites were immersed in 0.1 M NaOH for 15 minutes resulting in BHM, BHM-0.05, BHM-0.5, and BHM-1. The catalysts obtained were analyzed by XRD, SAA, ICP, and acidity test. The catalytic activity of the mordenites was evaluated in hydrotreating of pyrolyzed a-cellulose using stainless steel reactor with an H2 gas flow rate of 20 mL.min−1 at 450 °C for two hours with a catalyst: feed weight ratio of 1:60. The liquid products obtained from the hydrotreating were analyzed using GC-MS. The research results showed that the H2C2O4 and/or NaOH treatment towards the mordenites increased Si/Al ratio and decreased crystallinity. The acidity of mordenites decreased along with the increase of the Si/Al ratio. The average pore diameter of BHM, BHM-0.05, BHM-0.5, and BHM-1 mordenites were 2.898; 3.005; 3.792; 7.429 nm, respectively. The BHM-0.5 mordenite showed the highest catalytic activity in generating liquid product (88.88 wt%) and selectivity toward propanol (4.87 wt%). The BHM-1 mordenite showed catalytic activity in generating liquid product (41.16 wt%) and selectivity toward ethanol (1.21 wt%) and 2-heptyne (4.36 wt%). Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

Preparation of Nanosized RuB with Lower Ru Content Supported on Al2O3 and its Catalytic Activity

2012 ◽  
Vol 557-559 ◽  
pp. 1467-1470
Author(s):  
Sheng Xian Xu ◽  
Feng Yi Li
Keyword(s):  
Catalytic Activity ◽  
Amorphous Alloy ◽  
Inductively Coupled Plasma ◽  
Chemical Reduction ◽  
Benzene Hydrogenation ◽  
Transmission Electron Micrograph ◽  
X Ray Diffraction ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Loading Amount

The nanosized RuB amorphous alloys with three different ruthenium contents supported on Al2O3 were prepared by means of impregnation, following the chemical reduction with KBH4 solution. The gas-phase benzene hydrogenation was used as a probe reaction to evaluate the catalytic activity of the prepared catalysts. The catalysts were characterized by BET, inductively coupled plasma (ICP), X-ray diffraction (XRD), and transmission electron micrograph (TEM). The experiment results show that the catalytic activity of the three amorphous alloy catalysts goes up first with the increasing of temperature and has a maximum at 443K; when the Ru loading amount is 0.24 %(wt.%) of the catalyst, which is very few, the conversion of benzene on RuB/Al2O3 amorphous alloy catalyst can reach to 99.50% at 443K.

scholarly journals Pengaruh Loading Metal Dalam Katalis Cu-Zn-Al/γ-Al2O3 Terhadap Konversi Pada Hidrogenasi Karbon Monoksida Menjadi Dimethyl Ether

REAKTOR ◽  
2017 ◽  
Vol 9 (2) ◽  
pp. 26
Author(s):  
S. Lourentius
Keyword(s):  
Gas Chromatography ◽  
Dimethyl Ether ◽  
Inductively Coupled Plasma ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Sedimentation Method ◽  
Metal Metal ◽  
Plasma Spectrometer

Penelitian ini bertujuan untuk mempelajari unjuk kerja dua katalis Cu-Zn-Al/γ-Al2O3 untuk hidrogenasi karbonmonoksida menjadi DME. Metal-metal dengan “coprecipitating sedimentation method”, dilanjutkan penyaringan. Endapannya dikeringkan pada 120 0C, kemudian dikalsinasi pada 350 0C dan direduksi dengan hydrogen pada 230 0C. Selanjutnya katalis dianalisis dengan instrument X-Ray Diffraction (XRD) dan inductively Coupled Plasma Spectrometer (ICPS). Katalis Cu-Zn-Al/γ-Al2O3 memiliki loading Cu = 8,11%, Zn = 1,98%, dan Al = 0,99%, sementara Cu-Zn-Al/γ-Al2O3 memiliki loading 11% Cu, 1,74% Zn, dan 2,0% Al. Hidrogenasi karbon monoksida dilaksanakan dalam reaktor unggun tetap dengan diameter dalam 10 mm dan panjang 300 mm. kondisi proses : perbandingan mol hydrogen terhadap karbon monoksida (CO) =2/1, kecepatan aliran produk 88-109 ml/menit., suhu 240-300 0C, berat katalis 3 gram dan tekanan 4 MPa. Komposisi umpan dan produk reaksi dianalisis dengan  Gas Chromatography. Disimpulakan bahwa kedua katalis  mampu mengarahkan reaksi hidrigenasi karbon monoksida menjadi DME dan katalis ( dengan loading lebih besar yaitu) Cu-Zn-Al/γ-Al2O3 dengan loading Cu= 11%, Zn=1,74% dan Al=2% memiliki unjuk kerja yang lebih baik. Kondisi proses yang lebih baik dicapai pada suhu reaktor =260 0C, kecepatan produk 88 ml/menit dan tekanan 40 bar, dengan konversi CO= 0,926 dan selektivitas DME= 0,940.Kata kunci : CO, DME, hidogenasi, katalis, loading

scholarly journals High-efficiency method for recycling lithium from spent LiFePO4 cathode

2020 ◽  
Vol 9 (1) ◽  
pp. 1586-1593
Author(s):  
Tingting Yan ◽  
Shengwen Zhong ◽  
Miaomiao Zhou ◽  
Xiaoming Guo ◽  
Jingwei Hu ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
High Efficiency ◽  
Optical Emission ◽  
Extraction Process ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Inductively Coupled ◽  
Moisture Analysis ◽  
Lifepo4 Cathode ◽  
Solid Liquid

Abstract The extraction of Li from the spent LiFePO4 cathode is enhanced by the selective removal using interactions between HCl and NaClO to dissolve the Li+ ion while Fe and P are retained in the structure. Several parameters, including the effects of dosage and drop acceleration of HCl and NaClO, reaction time, reaction temperature, and solid–liquid ratio on lithium leaching, were tested. The Total yields of lithium can achieve 97% after extraction process that lithium is extracted from the precipitated mother liquor, using an appropriate extraction agent that is a mixture of P507 and TBP and NF. The method also significantly reduced the use of acid and alkali, and the economic benefit of recycling is improved. Changes in composition, morphology, and structure of the material in the dissolution process are characterized by inductively coupled plasma optical emission spectrometry, scanning electron microscope, X-ray diffraction, particle size distribution instrument, and moisture analysis.

The Characteristic Evaluation of Hydroxyapatite Powders Synthesized from CaCO3 Refined from Oyster Shell and H3PO4

2006 ◽  
Vol 118 ◽  
pp. 639-644
Author(s):  
Hye Sung Kim ◽  
Su Chak Ryu
Keyword(s):  
Bone Density ◽  
Inductively Coupled Plasma ◽  
Oyster Shell ◽  
Atomic Emission ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Infra Red ◽  
Ft Ir

Hydroxyapatite (Ca10(PO4)6(OH)2, HAp) powders is synthesized using the mixed powders of CaCO3 refined from oyster shells and phosphoric acid (H3PO4-98%, Daejung) as starting materials. The characteristic evaluation and chemical analysis of the synthesized powders is performed by X-ray diffraction (XRD), Fourier-transformed infra-red spectroscopy (FT-IR), and inductively-coupled plasma atomic emission spectroscopy (ICPAES). XRD analysis of synthetic powder by heat treatment at 1300°C for 2hrs shows only HAp peaks corresponding to stoichiometric HAp. It is confirmed by ICP-AES test that impurities such as Zn, In, Ti, Ba, Cd, Pb, and Mn, is not detected at all, but small amounts of Ti and Be is observed (0.099ppm Ti and 0.002ppm Ba). Variation of bone density is measured by giving medication of HAp powder with drinking water into human body continuously for three month. After the medication, the bone density is higher than the medication before. This means that HAp powder made from this process can be used as improver of bone density.

scholarly journals Speciation of organometals using a synchronizing GC-EIMS and GC-ICPMS system for simultaneous detection

2014 ◽  
Vol 29 (6) ◽  
pp. 1132-1137 ◽  
Author(s):  
Lucia D'Ulivo ◽  
Lu Yang ◽  
Yong-Lai Feng ◽  
John Murimboh ◽  
Zoltán Mester
Keyword(s):  
Gas Chromatography ◽  
Mass Spectrometer ◽  
Inductively Coupled Plasma ◽  
Simultaneous Detection ◽  
Electron Ionization ◽  
Ionization Mass ◽  
Inductively Coupled

Accurate quantitation and characterization of organometals are successfully achieved by splitting the gas chromatography (GC) flow to both an electron ionization mass spectrometer (EIMS) and an inductively coupled plasma mass spectrometer (ICPMS).

Species-Selective Analysis by Microcolumn Multicapillary Gas Chromatography with Inductively Coupled Plasma Mass Spectrometric Detection

1999 ◽  
Vol 71 (20) ◽  
pp. 4534-4543 ◽  
Author(s):  
Isaac Rodrigueż ◽  
Sandra Mounicou ◽  
Ryszard Łobiński ◽  
Vladimir Sidelnikov ◽  
Youri Patrushev ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Inductively Coupled Plasma ◽  
Mass Spectrometric ◽  
Mass Spectrometric Detection ◽  
Inductively Coupled ◽  
Selective Analysis

scholarly journals Characterization of Fly Ash Generated from Matla Power Station in Mpumalanga, South Africa

2012 ◽  
Vol 9 (4) ◽  
pp. 1788-1795 ◽  
Author(s):  
Olushola S. Ayanda ◽  
Olalekan S. Fatoki ◽  
Folahan A. Adekola ◽  
Bhekumusa J. Ximba
Keyword(s):  
Fly Ash ◽  
Inductively Coupled Plasma ◽  
Coal Fly Ash ◽  
Harmful Effect ◽  
Point Of Zero Charge ◽  
X Ray Diffraction ◽  
Power Station ◽  
X Ray ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

In this study, fly ash was obtained from Matla power station and the physicochemical properties investigated. The fly ash was characterized by x-ray fluorescence, x-ray diffraction, scanning electron microscopy, and inductively coupled plasma mass spectrometry. Surface area, particle size, ash and carbon contents, pH, and point of zero charge were also measured. The results showed that the fly ash is alkaline and consists mainly of mullite (Al6Si2O13) and quartz (SiO2). Highly toxic metals As, Sb, Cd, Cr, and Pb as well as metals that are essential to health in trace amounts were also present. The storage and disposal of coal fly ash can thus lead to the release of leached metals into soils, surface and ground waters, find way into the ecological systems and then cause harmful effect to man and its environments.

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