Effects of large pore zeolite additions in the catalytic pyrolysis catalyst on the light olefins production

2007 ◽  
Vol 125 (3-4) ◽  
pp. 270-277 ◽  
Author(s):  
Xianfeng Li ◽  
Baojian Shen ◽  
Qiaoxia Guo ◽  
Jinsen Gao
Keyword(s):  
Catalytic Pyrolysis ◽  
Light Olefins ◽  
Large Pore ◽  
Pyrolysis Catalyst

scholarly journals Methanol promoted naphtha catalytic pyrolysis to light olefins on Zn-modified high-silicon HZSM-5 zeolite catalysts

RSC Advances ◽  
2019 ◽  
Vol 9 (36) ◽  
pp. 20818-20828 ◽  
Author(s):  
Qi-tong Cheng ◽  
Ben-xian Shen ◽  
Hui Sun ◽  
Ji-gang Zhao ◽  
Ji-chang Liu
Keyword(s):  
Catalytic Pyrolysis ◽  
Coupling Reaction ◽  
Zeolite Catalysts ◽  
Light Olefins ◽  
Efficient Utilization ◽  
Catalytic Reactivity ◽  
High Silicon ◽  
The Relationship

Exploring the relationship between the properties and catalytic reactivity of the Zn-modified high-silicon ZSM-5 in the methanol/naphtha coupling reaction and achieving the efficient utilization of naphtha.

Light olefins and light oil production from catalytic pyrolysis of waste tire

2009 ◽  
Vol 86 (2) ◽  
pp. 281-286 ◽  
Author(s):  
Nguyễn Anh Dũng ◽  
Raweewan Klaewkla ◽  
Sujitra Wongkasemjit ◽  
Sirirat Jitkarnka
Keyword(s):  
Catalytic Pyrolysis ◽  
Oil Production ◽  
Light Olefins ◽  
Waste Tire ◽  
Light Oil

Catalytic Pyrolysis of High Density Polyethylene on a HZSM-5 Zeolite Catalyst in a Conical Spouted Bed Reactor

2007 ◽  
Vol 5 (1) ◽  
Author(s):  
Gorka Elordi ◽  
Gartzen Lopez ◽  
Roberto Aguado ◽  
Martin Olazar ◽  
Javier Bilbao
Keyword(s):  
Atmospheric Pressure ◽  
Catalytic Pyrolysis ◽  
Zeolite Catalyst ◽  
Catalyst Deactivation ◽  
Gasoline Fraction ◽  
Light Olefins ◽  
Spouted Bed ◽  
Product Analysis ◽  
Commercial Gasoline ◽  
On Line

HDPE has been pyrolysed at 450 °C and 500 °C using HZSM-5 zeolite as a catalyst. Batch runs have been carried out at atmospheric pressure in a conical spouted bed reactor. Product analysis has been carried out by means of a GC, connected on-line with a thermostated line. The degradation rate of the plastic is slightly faster at 500 °C than at 450 °C and much faster than thermal pyrolysis in both cases. Products have been grouped into five lumps: the lump of light olefins, C2-C4; light alkanes, C1-C4; the gasoline fraction, C5-C11 compounds; C11+ hydrocarbons; and the coke deposited on the catalyst. An HZSM-5 catalyst is appropriate to obtain light olefins; about 55 wt% in both cases. The yield of gasoline fraction is also considerable and although its composition is not suitable for commercial gasoline, is interesting for its use in petrochemistry. The catalyst deactivation rate is low.

Catalytic pyrolysis of hemicellulose for the production of light olefins and aromatics over Fe modified ZSM-5 catalysts

Cellulose ◽  
2019 ◽  
Vol 26 (15) ◽  
pp. 8489-8500 ◽  
Author(s):  
Mingfa Yang ◽  
Jingai Shao ◽  
Haiping Yang ◽  
Yingquan Chen ◽  
Xiaowei Bai ◽  
...  
Keyword(s):  
Catalytic Pyrolysis ◽  
Light Olefins

scholarly journals Improving Light Olefins and Light Oil Production Using Ru/MCM-48 in Catalytic Pyrolysis of Waste Tire

2011 ◽  
Vol 9 ◽  
pp. 245-251 ◽  
Author(s):  
Chaiyaporn Witpathomwong ◽  
Rujirat Longloilert ◽  
Sujitra Wongkasemjit ◽  
Sirirat Jitkarnka
Keyword(s):  
Catalytic Pyrolysis ◽  
Oil Production ◽  
Light Olefins ◽  
Waste Tire ◽  
Light Oil

scholarly journals Catalytic Pyrolysis of Naphtha on SHS Catalysts

2009 ◽  
Vol 12 (1) ◽  
pp. 17 ◽  
Author(s):  
G. Xanthopoulou ◽  
G. Vekinis
Keyword(s):  
Conversion Efficiency ◽  
Strong Interaction ◽  
Catalytic Pyrolysis ◽  
Catalyst Surface ◽  
Active Phase ◽  
Light Olefins ◽  
High Yield ◽  
Partial Substitution ◽  
Process Conditions ◽  
Thermal Pyrolysis

High yield of light olefins by catalytic pyrolysis of naphtha on spinel-based catalysts is reported. The yields of ethylene and propylene reach over 50% and are at least 10% and 5% higher respectively than the yield using thermal Pyrolysis, under the same process conditions. The partial substitution of Mg by Co in MgAl<sub>2</sub>O<sub>4</sub> and the incorporation of Al<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>, MgO, H<sub>3</sub>BO<sub>3</sub> in the spinel and SHS synthesis of KVO<sub>3</sub> all increase the catalytic conversion efficiency while at the same time they suppress substantially the formation of coke. It was found that SHS-KVO<sub>3</sub> catalytically accelerates the gasification of coke deposited on the catalyst surface and its optimum values were found to be more than 10 wt.%. The addition of B<sub>2</sub>O<sub>3</sub> into the KVO<sub>3</sub>-based catalyst causes a strong interaction between KVO<sub>3</sub> and SHS support, which decreases the loss by evaporation of the active phase

Two-Step Catalytic Pyrolysis of Corn Stover in a Dual Bed Reactor

2014 ◽  
Vol 1051 ◽  
pp. 143-147 ◽  
Author(s):  
Zhao Ping Zhong ◽  
Zu Wei Song ◽  
Bo Zhang ◽  
Zhi Chao Liu ◽  
Ze Yu Xue
Keyword(s):  
Corn Stover ◽  
Reaction Temperature ◽  
Catalytic Pyrolysis ◽  
Fixed Bed ◽  
Relative Content ◽  
Fixed Bed Reactor ◽  
Catalytic Reforming ◽  
Reforming Catalysts ◽  
Bio Oil ◽  
Pyrolysis Catalyst

Experiments on the catalytic pyrolysis of corn stover and catalytic reforming of pyrolysis vapors were conducted in a tubular fixed-bed reactor. The influence of reaction temperature, pyrolysis catalysts, dosage of pyrolysis catalysts and dosage of reforming catalysts were investigated. The results showed that with the increase of reaction temperature, the oil and char yields decreased and the gas yield increased. The highest-quality bio-oil was achieved at the reaction temperature of 400 °C, and dolomite showed a best performance on the biomass pyrolysis compared to other catalysts. Besides, When the dosage of pyrolysis catalyst was 1 g, the relative content of aromatic was 43.92 wt% and the relative content of acids was 47.58 wt%, and when the dosage of reforming catalyst was 2 g, the relative content of aromatic was 34.1 wt% and the relative content of acids was 58.7 wt%.

scholarly journals Nine-Lump Kinetic Study of Catalytic Pyrolysis of Gas Oils Derived from Canadian Synthetic Crude Oil

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Rui Zhang ◽  
Li Li ◽  
Zhichang Liu ◽  
Xianghai Meng
Keyword(s):  
Kinetic Model ◽  
Crude Oil ◽  
Catalytic Pyrolysis ◽  
Zeolite Catalyst ◽  
Catalyst Deactivation ◽  
Arrhenius Equation ◽  
Activation Energies ◽  
Least Square ◽  
Light Olefins ◽  
Apparent Activation Energies

Catalytic pyrolysis of gas oils derived from Canadian synthetic crude oil on a kind of zeolite catalyst was conducted in a confined fluidized bed reactor for the production of light olefins. The overall reactants and products were classified into nine species, and a nine-lump kinetic model was proposed to describe the reactions based on appropriate assumptions. This kinetic model had 24 rate constants and a catalyst deactivation constant. The kinetic constants at 620°C, 640°C, 660°C, and 680°C were estimated by means of nonlinear least-square regression method. Preexponential factors and apparent activation energies were then calculated according to the Arrhenius equation. The apparent activation energies of the three feed lumps were lower than those of the intermediate product lumps. The nine-lump kinetic model showed good calculation precision and the calculated yields were close to the experimental ones.

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