Tailoring product distribution during upgrading of palmitic acid over bi-functional metal/zeolite catalysts

2017 ◽  
Vol 166 ◽  
pp. 262-273 ◽  
Author(s):  
Yanchun Shi ◽  
Enhui Xing ◽  
Yaya Cao ◽  
Mingjuan Liu ◽  
Kejing Wu ◽  
...  
Keyword(s):  
Palmitic Acid ◽  
Product Distribution ◽  
Zeolite Catalysts

Effect of Silica Base Catalyst on Transformation of Methanol to Hydrocarbon

2017 ◽  
Vol 751 ◽  
pp. 512-517 ◽  
Author(s):  
Supranee Lao-Ubol ◽  
Phunthinee Somwongsa ◽  
Pracha Laoauyporn ◽  
Pasinee Panith ◽  
Siriporn Larpkiattaworn ◽  
...  
Keyword(s):  
Pore Diameter ◽  
Fixed Bed ◽  
Methanol Conversion ◽  
Liquid Hydrocarbon ◽  
Product Distribution ◽  
Catalytic Performance ◽  
Zeolite Catalysts ◽  
Fixed Bed Reactor ◽  
Phosphorus Species ◽  
Methanol To Hydrocarbon

Five different types of silica catalyst (SBA-15, SBA-15-PO3H2, and three different Si/Al ratio of commercial zeolites (30, 80 and 280) were used to study the transformation of methanol to hydrocarbon (MTH). The aim of this study was to investigate the effect of pore diameter and acidity in the structure of silica catalysts on the process performances in terms of methanol conversion and hydrocarbon selectivity. The mesoporous silica catalysts were prepared by co-condensation method. The catalysts samples were characterized by GC-MS, XRD, BET, and NH3-TPD techniques. The catalytic performance of synthesized and commercial catalysts for MTH process was evaluated using a homemade fixed bed reactor at temperature (300°C). It was found that the liquid hydrocarbon product provided by zeolite catalysts is aromatic hydrocarbons-rich. High Si/Al zeolites with larger pore size lead to higher selectivity and yield to paraffins (C1-C7). In contrast to commercial zeolite catalyst, SBA-15 and its modification with phosphorus species showed no conversion under studied condition. These results indicate that both pore diameter and acidity influence the product distribution in methanol to hydrocarbon process.

scholarly journals Product Distribution in Degradation of Polypropylene over Silica-Alumina and CaX Zeolite Catalysts

1983 ◽  
Vol 56 (9) ◽  
pp. 2768-2773 ◽  
Author(s):  
Yoshio Uemichi ◽  
Yasunori Kashiwaya ◽  
Masaya Tsukidate ◽  
Akimi Ayame ◽  
Hisao Kanoh
Keyword(s):  
Product Distribution ◽  
Zeolite Catalysts ◽  
Silica Alumina

scholarly journals Deactivation of Zeolite Catalysts in the Prins Reaction between Propene and Formaldehyde in the Liquid Phase

Catalysts ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1181
Author(s):  
Stanislav P. Bedenko ◽  
Konstantin I. Dement’ev ◽  
Valentin F. Tret’yakov
Keyword(s):  
Liquid Phase ◽  
Kinetic Model ◽  
Pore Diameter ◽  
Product Distribution ◽  
Acid Sites ◽  
Weak Acid ◽  
Zeolite Catalysts ◽  
Prins Reaction ◽  
Acidic Properties ◽  
Deactivation Process

The Prins reaction between propene and formaldehyde was studied over H-BEA, H-FAU, H-MFI and H-MOR zeolites at 150 °C in liquid phase. It was found that the H-BEA sample is the most active and selective toward buta-1,3-diene; the H-MFI is a potential catalyst for 3-buten-1-ol synthesis, while H-FAU can be used for 4-methyl-1,3-dioxane production. It had been confirmed that zeolite textural and acidic properties influence catalyst behaviour: the acidic properties influence sample activity, while product distribution is controlled by pore volume and effective pore diameter. The sample’s deactivation process had been studied and the kinetic model of deactivation was proposed. It was shown that the deactivation rate for the H-MFI catalyst is four times greater than for the H-BEA catalyst, probably because its strong/weak acid sites ratio is much more high than for the H-BEA.

Influence of Porosity on Product Distribution over Co/H-ZSM-22 Catalysts in the Upgrading of Palmitic Acid

2018 ◽  
Vol 6 (2) ◽  
pp. 406-415 ◽  
Author(s):  
Mingjuan Liu ◽  
Yanchun Shi ◽  
Yunfei Bi ◽  
Enhui Xing ◽  
Yulong Wu ◽  
...  
Keyword(s):  
Palmitic Acid ◽  
Product Distribution

Evaluation of zeolite catalysts on product distribution during sweet sorghum bagasse catalytic pyrolysis

Energy ◽  
2021 ◽  
Vol 214 ◽  
pp. 118799
Author(s):  
Xiajin Ren ◽  
Hongzhen Cai ◽  
Qingfa Zhang ◽  
Donghong Zhang ◽  
Xiaona Lin
Keyword(s):  
Sweet Sorghum ◽  
Catalytic Pyrolysis ◽  
Product Distribution ◽  
Zeolite Catalysts ◽  
Sweet Sorghum Bagasse ◽  
Sorghum Bagasse

Effect of Si/Al2 Ratio on Catalytic Performance of HZSM-5 Zeolites for Conversion of Ethanol to Propylene

2014 ◽  
Vol 953-954 ◽  
pp. 1121-1124 ◽  
Author(s):  
Wei Xia ◽  
Qi Sun ◽  
Shang Wen Liu ◽  
Lin Ping Qiang ◽  
Yuan Cun Cui
Keyword(s):  
Active Site ◽  
Product Distribution ◽  
Catalytic Performance ◽  
Zeolite Catalysts ◽  
Light Olefins ◽  
Product Distributions ◽  
Similar Product

Ethanol has great potential to be a candidate for the source of light olefins such as ethylene and propylene. However, ethanol to olefin (ETO) process has not been fully investigated. In this work, the conversion of ethanol to propylene was investigated over H-ZSM-5 zeolite catalysts with different Si/Al2 ratios (80 and 280). Similar product distributions were obtained with the two catalysts at different contact times, and the turnover frequencies of the two catalysts were identical. These results strongly imply that the product distribution was independent of the Si/Al2 ratio and that the active site for conversion of ethanol to propylene was the identical for both catalysts.

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