Investigation of lanthanum and Si/Al ratio effect on the HZSM-5 catalyst efficiency for production of Olefin from Methanol

Zarei, Taleb; Amiri, Farhad; Farahbod, Farshad

doi:10.1080/10916466.2017.1386679

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…Some small particles are covered on the surface after the modification of lanthanum metal [ 28 , 36 , 86 ], and these doped samples seem a little rougher than the pure HZSM-5 [ 28 ]. However, at this magnification, the distributions of lanthanum particles could not be seen [ 28 , 86 ], which is consistent with the XRD patterns. The average crystallite size of the parent HZSM-5 and lanthanum-modified HZSM-5 zeolite catalysts is about 91–218 nm [ 28 , 33 , 87 ].…”

Section: Resultsmentioning

confidence: 99%

Catalytic Deoxygenation of Hydrolyzed Oil of Chlorella Vulgaris Microalgae over Lanthanum-Embedded HZSM-5 Zeolite Catalyst to Produce Bio-Fuels

et al. 2022

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Microalgae is one of the most important sources of green hydrocarbons because it contains a high percentage of lipids and is likely to reduce reliance on fossil fuels. Several zeolite-based catalysts have a short lifetime due to coke-formation deactivation. In this study, a lanthanum-modified HZSM-5 zeolite catalyst for the conversion of crude oil into non-oxygenated compounds (hydrocarbons) and oxygenated compounds has been investigated. The crude oil of Chlorella Vulgaris microalgae was extracted using Soxhlet and converted into hydrolyzed oil (HO) through a transesterification reaction. The experiments were conducted in a batch reactor (300 °C, 1000 rpm, 7 bar of N2, the catalyst to the algal HO ratio of 15% (wt.%) and 6 h). The results were organized into three groups: product yield, chemical composition, and carbon number distribution. The liquid products were investigated, including their elemental composition, higher heating value (HHV), atomic ratios of O/C and H/C, and degree of deoxygenation (DOD%). The loading of lanthanum into HZSM-5 zeolite with different loading percentages enhanced the acid sites needed for the algal HO conversion. Among all the synthesized catalysts, 10%La/HZSM-5 produced the highest conversion of the algal HO, the highest yield of hydrocarbons, the highest HHV, and the highest DOD%; those were 100%, 36.88%, 34.16 MJ/kg, and 56.11%, respectively. The enhanced catalytic conversion was due to the presence of lanthanum, which alters the active sites for the desired reactions of catalytic deoxygenation. The main effect of the modification of the parent HZSM-5 zeolite with lanthanum led to adjusting the acidic sites needed to increase the conversion (%) of the algal HO in the catalytic deoxygenation process and thus increase the hydrocarbon yield (%), which in turn led to an increase in the HHV and DOD%. The proposed La-based zeolite composite is promising for different energy applications due to its unique benefits compared to other expensive and less-stable catalysts.

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Section: Resultsmentioning

confidence: 99%

Catalytic Deoxygenation of Hydrolyzed Oil of Chlorella Vulgaris Microalgae over Lanthanum-Embedded HZSM-5 Zeolite Catalyst to Produce Bio-Fuels

et al. 2022

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“…Therefore, the resulting fuels are produced in accordance with environmental standards [24]. The growing challenge of the need for energy for transportation around the world is no longer a simple subject and will not be met by the production of hydrocarbon liquid fuel [25]. The complex environmental problems and process problems add to this challenge [26].…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation Of A New Process For Removing Sulfur Compounds From Sour Oil In A Fixed Nano Bed: Investigation Of Energy Saving In Oil Refineries

2022

IJPNG

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Removal of hydrogen sulfide from crude oil is an important process in oil refineries that reduces the concentration of sulfur in oil. The use of nano-catalysts in the removal of sulfur from oil is a new method. The zinc nano oxide with a diameter of 54 to 91 nm has been used in sour oil refining in this study. The experiments have been performed for the catalytic separation of two samples of heavy and light oil. In this study, the effect of different operating parameters on the performance of the sweetening process has been investigated. According to the results, temperature of 55°C and pressure of 1.6 bar can be introduced as optimal temperature and pressure. In addition, zinc oxide with a diameter of 58 nm and 77 nm can be used as the optimal diameter for sweetening of heavy oil and light oil, respectively

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Verifying the olefin formation mechanism of the methanol-to-hydrocarbons reaction over H-ZSM-48

Zhang

Huang

et al. 2019

Catal. Sci. Technol.

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Investigation of lanthanum and Si/Al ratio effect on the HZSM-5 catalyst efficiency for production of Olefin from Methanol

Cited by 5 publications

References 17 publications

Catalytic Deoxygenation of Hydrolyzed Oil of Chlorella Vulgaris Microalgae over Lanthanum-Embedded HZSM-5 Zeolite Catalyst to Produce Bio-Fuels

Catalytic Deoxygenation of Hydrolyzed Oil of Chlorella Vulgaris Microalgae over Lanthanum-Embedded HZSM-5 Zeolite Catalyst to Produce Bio-Fuels

Experimental Evaluation Of A New Process For Removing Sulfur Compounds From Sour Oil In A Fixed Nano Bed: Investigation Of Energy Saving In Oil Refineries

Verifying the olefin formation mechanism of the methanol-to-hydrocarbons reaction over H-ZSM-48

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