Cracking of n-hexane over hierarchical MOR zeolites derived from natural minerals

Nasser, Galal A.; Kurniawan, Teguh; Tago, Teruoki; Bakare, Idris A.; Taniguchi, Tomoyo; Nakasaka, Yuta; Masuda, Toshio; Muraza, Oki

doi:10.1016/j.jtice.2015.11.025

Cited by 36 publications

(28 citation statements)

References 28 publications

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“…The peak at diffraction 2ϴ = 11.3 o , 13.2 o , 16.8 o , 17.2 o , 19 o , 22.3 o , 25.5 o , 25.9 o , 26.2 o , 28 o , 29.7 o , 29.9 o has an intensity which decreased of ZAB-1M sample compared to the ZAB-NA sample. The use of H2SO4 in the zeolite activation process causes dealumination, in which this is the cause of decrease intensity of ZAB-1M sample (Nasser et al, 2016). Dealumination causes damage to the structure of the alumina silica framework by breaking aluminum within the zeolite framework into aluminum outside the framework.…”

Section: = 100%mentioning

confidence: 99%

“…Natural zeolite contained in nature needs to be activated to be applied to the pyrolysis process. Dealumination process is a method that can be used to open zeolite pores by releasing aluminum in the zeolite skeletal structure using acids (Nasser et al, 2016). The removal of aluminum causes an increase in Si / Al ratio which affects the acidity and surface properties of pores as well as the pore size distribution (Wang and Peng, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Acid Concentration on the Activation of Bayah Natural Zeolite for Palm Kernel Shell Pyrolysis Application

Suhendi

Wibowo

Lestari

et al. 2020

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Biooil is the main product in the pyrolysis process which is expected to be a liquid fuel replacement solution. But the resulting biooil cannot be directly used as a result of high oxygenated compounds, high viscosity, corrosive, and unstable. Addition of activated natural zeolite catalyst to the pyrolysis process is expected to improve the quality of biooil in order to be used as a renewable liquid fuel. The research aims to determine the influence of acid concentrations on zeolite modification to the characteristics of pyrolysis products. Result of catalyst characterization indicates that zeolite activation using acid will increase Si/Al ratio as well as open the surface of previously hindered zeolite. The yield of char produced in this study tends not to undergo significant changes between the catalytic and noncatalytic pyrolysis by 33% wt. Addition of zeolite catalyst in pyrolysis proved to be able to increase the content of phenol and decrease the content of acetic acid in bio-oil by 6% . Meanwhile, yield of CO2 increases by 20% in the use of catalysts due to the release of oxygen in the oxygenate compounds. The results of this study showed that the resulting biooil still does not meet the specifications of liquid fuels but can be utilized as a renewable chemical feedstock.Keywords: pyrolysis; biomass; natural zeolite;modified

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Section: = 100%mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Acid Concentration on the Activation of Bayah Natural Zeolite for Palm Kernel Shell Pyrolysis Application

Suhendi

Wibowo

Lestari

et al. 2020

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“…The catalytic activity was a function of (i) the number of acid sites, (ii) the presence of mesopores, (iii) the existence of a large surface area, and (iv) the hydrophobicity of the catalyst [38]. The later, the hydrophobicity of the catalyst, was crucial to prevent the hydrolysis of solketal [37][38][39][40][41]. According to Table 4, Cs 2.5/KIT-6 catalyst was one of the best catalysts for the conversion of glycero-to-solketal [42].…”

Section: Glycerol-to-solketal Over Mesoporous Silicamentioning

confidence: 99%

Glycerol to Solketal for Fuel Additive: Recent Progress in Heterogeneous Catalysts

et al. 2019

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Biodiesel has been successfully commercialized in numerous countries. Glycerol, as a byproduct in biodiesel production plant, has been explored recently for fuel additive production. One of the most prospective fuel additives is solketal, which is produced from glycerol and acetone via an acetalization reaction. This manuscript reviewed recent progress on heterogeneous catalysts used in the exploratory stage of glycerol conversion to solketal. The effects of acidity strength, hydrophobicity, confinement effect, and others are discussed to find the most critical parameters to design better catalysts for solketal production. Among the heterogeneous catalysts, resins, hierarchical zeolites, mesoporous silica materials, and clays have been explored as effective catalysts for acetalization of glycerol. Challenges with each popular catalytic material are elaborated. Future works on glycerol to solketal will be improved by considering the stability of the catalysts in the presence of water as a byproduct. The presence of water and salt in the feed is certainly destructive to the activity and the stability of the catalysts.

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“…Natural zeolite from Klaten Indonesia has been long studied for several purposes, such as: hydrocracking of LDPE plastic waste [14], pyrolysis and catalytic cracking [15,16], adsorption of heavy metal [17], and hydrocracking of waste lubricant oil [18]. Modification of these natural zeolites with several metals, i.e.…”

Section: Introductionmentioning

confidence: 99%

Fe/Indonesian Natural Zeolite as Hydrodeoxygenation Catalyst in Green Diesel Production from Palm Oil

Putra

Lestari

Wibowo

et al. 2017

Bull. Chem. React. Eng. Catal.

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The Petroleum diesel-based fossil fuel remains the primary source of energy consumption in Indonesia. The utilization of this unrenewable fuel depletes fossil fuels; thus, an alternative, renewable fuel, such as one based on biohydrocarbon from biomass-green diesel-could be an option. In this work, green diesel was produced through the hydrodeoxygenation from palm oil and processed in a batch-stirred autoclave reactor over natural zeolite (NZ) and NZ modified with 3 wt.% Fe metal (Fe/NZ) as heterogeneous catalyst. NZ showed high crystallinity and suitability to the simulated pattern of the mordenite and clinoptilolite phases according to X-ray diffraction (XRD) analysis. The presence of Fe metal was further confirmed by XRD, with an additional small diffraction peak of Fe 0 that appeared at 2θ = 44-45°. Meanwhile, NZ and Fe/NZ were also characterized by Scanning electron microscopy (SEM) with Energy Dispersive X-ray (EDX), X-ray Fluorescence (XRF), and Surface Area Analyzer (SAA). The obtained materials were tested for the conversion of palm oil into diesel-range hydrocarbons (C15-C18) under conditions of 375 °C and 12 bar H2 for 2 h. NZ and Fe/NZ produced a liquid hydrocarbon with straight-chain (C15-C18) alkanes as the most abundant products. Based on Gas Chromatography-Mass Spectrometry (GC-MS) measurement, a higher conversion of palm oil into diesel-like hydrocarbons reached more than 58% and 89%, when NZ and Fe modified NZ (Fe/NZ), respectively were used as catalysts.

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Cracking of n-hexane over hierarchical MOR zeolites derived from natural minerals

Cited by 36 publications

References 28 publications

Effect of Acid Concentration on the Activation of Bayah Natural Zeolite for Palm Kernel Shell Pyrolysis Application

Effect of Acid Concentration on the Activation of Bayah Natural Zeolite for Palm Kernel Shell Pyrolysis Application

Glycerol to Solketal for Fuel Additive: Recent Progress in Heterogeneous Catalysts

Fe/Indonesian Natural Zeolite as Hydrodeoxygenation Catalyst in Green Diesel Production from Palm Oil

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