scholarly journals Deoxygenation of Stearic Acid over Cobalt-Based NaX Zeolite Catalysts

Catalysts ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 42 ◽  
Author(s):  
James M. Crawford ◽  
Courtney S. Smoljan ◽  
Jolie Lucero ◽  
Moises A. Carreon
Keyword(s):  
Stearic Acid ◽  
Zeolite Catalyst ◽  
Zeolite Catalysts ◽  
Inert Gas ◽  
Liquid Fuels ◽  
High Conversion ◽  
Catalyst Loading ◽  
Nax Zeolite ◽  
Noble Metal Catalysts ◽  
Competing Pathways

For the production of sustainable biofuels from lipid biomass it is essential to develop non-noble metal catalysts with high conversion and selectivity under inert gas atmospheres. Herein, we report a novel cobalt-based catalyst supported on zeolite NaX via ion-exchange synthesis. The resultant bifunctional cobalt-based NaX zeolite catalyst displayed high conversion of stearic acid to liquid fuels. In addition, the effect of reaction temperature and catalyst loading was studied to evaluate the order of reaction and activation energy. Decarboxylation and decarbonylation were the dominant deoxygenation pathways. Stearic acid was successfully deoxygenated in N2 atmospheres using Co/NaX catalysts with a conversion as high as 83.7% and a yield to heptadecane up to ~28%. Furthermore, we demonstrate that higher reaction temperatures resulted in competing pathways of decarboxylation and decarbonylation. Finally, the fresh and recycled catalysts were characterized showing modest recyclability with a ~12.5% loss in catalytic activity.

scholarly journals Conversion of Oil Palm Empty Fruit Bunch (EFB) Biomass to Bio-Oil and Jet Bio-Fuel by Catalytic Fast-Pyrolysis Process

2021 ◽  
Vol 14 ◽  
pp. 1-11
Author(s):  
Haryanti Yahaya ◽  
Rozzeta Dollah ◽  
Norsahika Mohd Basir ◽  
Rohit Karnik ◽  
Halimaton Hamdan
Keyword(s):  
Oil Palm ◽  
Zeolite Y ◽  
Fast Pyrolysis ◽  
Batch Process ◽  
Zeolite Catalysts ◽  
Catalyst Loading ◽  
Empty Fruit Bunch ◽  
Catalytic Fast Pyrolysis ◽  
Compound Distribution ◽  
Bio Oil

Oil palm empty fruit bunch (EFB) biomass is a potential source of renewable energy. Catalytic fast-pyrolysis batch process was initially performed to convert oil palm EFB into bio-oil, followed by its refinement to jet bio-fuel. Crystalline zeolites A and Y; synthesised from rice husk ash (RHA), were applied as heterogeneous catalysts. The catalytic conversion of oil palm EFB to bio-oil was conducted at a temperature range of 320-400°C with zeolite A catalyst loadings of 0.6 - 3.0 wt%. The zeolite catalysts were characterised by XRD, FTIR and FESEM. The bio-oil and jet bio-fuel products were analysed using GC-MS and FTIR. The batch fast-pyrolysis reaction was optimised at 400°C with a catalyst loading of 1.0 wt%, produced 42.7 wt% yields of liquid bio-oil, 35.4 wt% char and 21.9 wt% gaseous products. Analysis by GCMS indicates the compound distribution of the liquid bio-oil are as follows: hydrocarbons (23%), phenols (61%), carboxylic acids (0.7%), ketones (2.7%), FAME (7.7%) and alcohols (0.8%). Further refinement of the liquid bio-oil by catalytic hydrocracking over zeolite Y produced jet bio-fuel, which contains 63% hydrocarbon compounds (C8-C18) and 16% of phenolic compounds.

Operating conditions to maximize clean liquid fuels yield by oligomerization of 1-butene on HZSM-5 zeolite catalysts

Energy ◽  
2020 ◽  
Vol 207 ◽  
pp. 118317
Author(s):  
Marta Díaz ◽  
Eva Epelde ◽  
Zuria Tabernilla ◽  
Ainara Ateka ◽  
Andrés T. Aguayo ◽  
...  
Keyword(s):  
Operating Conditions ◽  
Zeolite Catalysts ◽  
Liquid Fuels

Catalytic self-etherification of 5-hydroxymethylfurfural to 5,5′(oxy-bis(methylene))bis-2-furfural over zeolite catalysts: effect of pore structure and acidity

2020 ◽  
Vol 10 (14) ◽  
pp. 4684-4692
Author(s):  
Pilan Zhang ◽  
Jie Yang ◽  
Hualei Hu ◽  
Danxin Hu ◽  
Jiang Gan ◽  
...  
Keyword(s):  
Pore Structure ◽  
Zeolite Catalyst ◽  
The Self ◽  
Zeolite Catalysts

Understanding the role of pore structure and acidity of zeolite catalyst in the self-etherification of 5-hydroxymethylfurfural to 5,5′(oxy-bis(methylene))bis-2-furfural.

Catalytic Oligomerization of Isobutyl Alcohol to Hydrocarbon Liquid Fuels over Acidic Zeolite Catalysts

2020 ◽  
Vol 5 (2) ◽  
pp. 528-532 ◽  
Author(s):  
Xiaoyu Guo ◽  
Lisheng Guo ◽  
Yuichi Suzuki ◽  
Jinhu Wu ◽  
Yoshiharu Yoneyama ◽  
...  
Keyword(s):  
Zeolite Catalysts ◽  
Liquid Fuels ◽  
Isobutyl Alcohol ◽  
Hydrocarbon Liquid

Preparation and Characterization of CaO Nanoparticles/NaX Zeolite Catalysts for the Transesterification of Sunflower Oil

2011 ◽  
Vol 50 (5) ◽  
pp. 2665-2670 ◽  
Author(s):  
Sandra Luz Martínez ◽  
Rubi Romero ◽  
José Carlos López ◽  
Amaya Romero ◽  
Víctor Sánchez Mendieta ◽  
...  
Keyword(s):  
Sunflower Oil ◽  
Zeolite Catalysts ◽  
Nax Zeolite

Direct Conversion of Natural Gas to Petrochemicals Using Monofunctional Mo/SiO2and H-ZSM-5 Zeolite Catalysts and Bifunctional Mo/H-ZSM-5 Zeolite Catalyst

2012 ◽  
Vol 30 (9) ◽  
pp. 893-903 ◽  
Author(s):  
A. K. Aboul-Gheit ◽  
A. E. Awadallah ◽  
S. M. Abdel-Hamid ◽  
A. A. Aboul-Enein ◽  
D. S. El-Desouki
Keyword(s):  
Natural Gas ◽  
Zeolite Catalyst ◽  
Direct Conversion ◽  
Zeolite Catalysts

scholarly journals Utilization of Natural Zeolite Catalyst Impregnated Sn Metal in Glucose Isomerization With Temperature Variations

ALCHEMY ◽  
2015 ◽  
Vol 4 (1) ◽  
Author(s):  
Dwi Putri W. Pamungkas ◽  
Suci Amalia ◽  
Susi Nurul Khalifah
Keyword(s):  
Surface Area ◽  
Natural Zeolite ◽  
Zeolite Catalyst ◽  
Hydrothermal Process ◽  
Xrd Analysis ◽  
Zeolite Catalysts ◽  
Edax Analysis ◽  
Modification Process ◽  
Glucose Isomerization ◽  
Ammonia Method

<p>Studied the characteristics of natural zeolite catalysts activated and modifications and catalytic activity in the isomerization of glucose. Natural zeolite was activated by NH<sub>4</sub>NO<sub>3</sub> 2 M obtained catalyst HZA. While modification using 0,24 M Sn metal impregnated on HZA obtained catalyst Sn-HZA. At this stage, hydrothermal process carried out at temperature of 90 °C for 12 hours followed by calcination at temperature of 500 °C for 4 hours. The characterization includes the XRD analysis, SEM-EDAX analysis, acidity by ammonia method, and surface area by adsorption of methylene blue method. Glucose conversion was obtained through analysis of polarimeter at hour-0, 1, 2, 3, and 4 with temperature variation of 110, 120, and 130 °C. Solution which had the highest conversion resulted by polarimeter was analyzed by HPLC. XRD analysis showed that there were no changes in the structure of zeolite after activation and modification process. SEM-EDAX analysis showed that morphology of the zeolite surface is not damaged and Sn metal was successfully impregnated 6,94 %. The activity of HZA and Sn-HZA was 1,4850 mmol/g and 2,3145 mmol/g. while the surface area of HZA and Sn-HZA was 11,4077 m<sup>2</sup>/g and 11,4738 m<sup>2</sup>/g. Using the Sn-HZA catalyst with the reaction temperature of 120 °C provides the highest conversion of glucose and fructose selectivity. It were 14,0733 % w/v and 0,646 % w/v.<em>  </em></p><p class="BodyAbstract"> </p><strong><em>Keywords</em>:</strong> <em>Catalyst, glucose, isomerization, natural zeolite, Sn metal.</em>

The Production of Biodiesel from Waste Cooking Oil (Simultaneous Esterification and Transesterification Using Fe/Zeolite Catalysts from Waste Geothermal)

2020 ◽  
Vol 990 ◽  
pp. 161-167
Author(s):  
Naila Luthfi Muna ◽  
Anna Alif Mu'alimah ◽  
Dita Baeti Pridiana ◽  
Abel Kristanto Widodo ◽  
Sabrina Rahmi Adiyar ◽  
...  
Keyword(s):  
Zeolite Catalyst ◽  
Hydrothermal Process ◽  
Waste Cooking Oil ◽  
Zeolite Catalysts ◽  
National Standard ◽  
Cooking Oil

The main aim of this research is to produce biodiesel with simultaneous esterification and transesterification using Fe/Zeolite catalyst. Fe/Zeolite catalyst synthesized using hydrothermal process from waste geothermal of PT. Geodipa Energy. This catalyst analyzed using XRD, SEM, and BET test. The variables of this research are concentration (0,01 gr/gr, 0,015 gr/gr, 0,02 gr/gr, 0,025 gr/gr, 0,03 gr/gr) and temperature (50°C, 55°C, 60°C, 65°C, 70°C). The result of biodiesel characterization using simultaneous esterification and transesterification is positive to increase yield following concentration of catalyst and temperature of the reaction. This biodiesel has been in accordance with Indonesian National Standard 7182-2015.

Nitrogen Oxides Removal by Using Plate Type Reactor Combined with Catalysts

2002 ◽  
Vol 5 (2) ◽  
Author(s):  
Kazuo Shimizu ◽  
Tetsuji Oda
Keyword(s):  
Nitrogen Oxides ◽  
Thermal Plasma ◽  
Zeolite Catalyst ◽  
Zeolite Catalysts ◽  
Exhaust Gas ◽  
Type Reactor ◽  
Dielectric Barriers ◽  
Nox Adsorption ◽  
Non Thermal Plasma ◽  
Plate Type

AbstractNon-thermal plasma has been studied to remove nitrogen oxides. In order to improve both high removal and energy efficiency, the combined process of the catalyst with the non-thermal plasma was examined experimentally. Hydrocarbons were added where real exhaust gas contains hydrocarbons from incomplete combustion. However zeolite catalysts have shown NOx adsorption at room temperature. For decreasing the NOx adsorption on the catalyst surface, a plate type reactor, which has mesh electrodes and dielectric barriers inside, has been developed. Adsorption characteristics of zeolite catalyst were investigated by measuring time dependence of NO or NOx concentrations. They were hardly observed in these experiments, since, quantities of catalyst were very small (4-5%) compared to that of wire-cylinder reactor.

Sign in / Sign up

Export Citation Format

Share Document