Dimethyl ether conversion to light olefins over SAPO-34: Deactivation due to coke deposition

1998 ◽  
pp. 521-526 ◽  
Author(s):  
De Chen ◽  
Hans Petter Rebo ◽  
Kjell Moljord ◽  
Anders Holmen
Keyword(s):  
Dimethyl Ether ◽  
Coke Deposition ◽  
Light Olefins ◽  
Dimethyl Ether Conversion

Dimethyl Ether Conversion to Olefins over the SAPO-34/ZrO2 Catalysts: Effect of the ZrO2 Supporter

2011 ◽  
Vol 347-353 ◽  
pp. 3681-3684 ◽  
Author(s):  
Young Ho Kim ◽  
Su Gyung Lee ◽  
Byoung Kwan Yoo ◽  
Han Sol Je ◽  
Chu Sik Park
Keyword(s):  
Physicochemical Properties ◽  
Dimethyl Ether ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Coke Deposition ◽  
Light Olefins ◽  
Similar Activity ◽  
Dimethyl Ether Conversion ◽  
Zro2 Catalyst ◽  
Catalyst Lifetime

A SAPO-34 catalyst is well known to be one of the best catalysts for DME to olefins (DTO) reaction. Main products of the reaction were light olefins such as ethylene, propylene and butenes. However, the main problem is rapid deactivation of the SAPO-34 catalyst due to coke deposition during DTO reaction. In this study, various SAPO-34/ZrO2 catalysts added with ZrO2 were prepared for improving the lifetime and their physicochemical properties have been characterized by XRD and SEM. The DTO reaction over various SAPO-34/ZrO2 catalysts was carried out using a fixed bed reactor. All SAPO-34/ZrO2 catalysts showed similar activity and selectivity in the DTO reaction. The SAPO-34(9wt%)/ZrO2 catalyst was showed the best performance for the catalyst lifetime.

Reaction Characteristic of MeAPSO-34 (Me=Mn, Co) Catalysts for Olefins Production from Dimethyl Ether

2012 ◽  
Vol 550-553 ◽  
pp. 416-419
Author(s):  
Young Ho Kim ◽  
Su Gyung Lee ◽  
Eun Jee Kang ◽  
Hyo Sub Kim ◽  
Chu Sik Park
Keyword(s):  
Dimethyl Ether ◽  
Strong Acid ◽  
Acid Sites ◽  
Coke Deposition ◽  
Light Olefins ◽  
Co Catalysts ◽  
Strong Acid Sites ◽  
Reaction Characteristic ◽  
Catalyst Lifetime

In DME to olefins (DTO) reaction, SAPO-34 catalyst with CHA structure is well known to be one of the catalysts with good performance. However, the SAPO-34 catalyst is easily deactivated due to coke deposition during DTO reaction. In this study, MeAPSO-34 catalysts (Me=Mn, Co) were prepared for the increase of the catalyst lifetime and their properties have been characterized by XRD and SEM. The DTO reaction was carried out over the MeAPSO-34 catalysts, and the results were compared with the SAPO-34 catalyst. The lifetime of MeAPSO-34 catalysts with high DME conversion and selectivity of light olefins was prolonged than that of the SAPO-34 catalyst. It may be concluded that the decrease of strong acid sites, which were responsible for the formation of coke, affect on the lifetime of the MeAPSO-34 catalysts. In addition, the CoAPSO-34 catalyst with a Co additive showed the best performance in terms of the catalytic lifetime and the selectivity to light olefins.

Dimethyl Ether Conversion into Light Olefins in a Slurry Reactor: Entrainment and Decomposition of Dispersion Liquid

2019 ◽  
Vol 60 (5) ◽  
pp. 681-687
Author(s):  
N. N. Ezhova ◽  
O. V. Yashina ◽  
A. N. Stashenko ◽  
E. N. Khivrich ◽  
N. V. Kolesnichenko
Keyword(s):  
Dimethyl Ether ◽  
Slurry Reactor ◽  
Light Olefins ◽  
Dimethyl Ether Conversion

Dimethyl ether conversion to light olefins over the SAPO-34/ZrO2 composite catalysts with high lifetime

2014 ◽  
Vol 20 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Su-Gyung Lee ◽  
Hyo-Sub Kim ◽  
Young-Ho Kim ◽  
Eun-Jee Kang ◽  
Dong-Hee Lee ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Light Olefins ◽  
Composite Catalysts ◽  
Dimethyl Ether Conversion

Efficient Production of Light Olefin Based on Methanol Dehydration: Simulation and Design Improvement

2020 ◽  
Vol 23 ◽  
Author(s):  
S. Majid Abdoli ◽  
Mahsa Kianinia
Keyword(s):  
Dimethyl Ether ◽  
Flow Reactor ◽  
New Technology ◽  
Plug Flow ◽  
Light Olefins ◽  
Efficient Production ◽  
Actual Process ◽  
Light Olefin ◽  
Aspen Hysys ◽  
Improved Design

Background: Ethylene, propylene, and butylene as light olefins are the most important intermediates in the petrochemical industry worldwide. Methanol to olefins (MTO) process is a new technology based on catalytic cracking to produce ethylene and propylene from methanol. Aims and Objective: This study aims to simulate the process of producing ethylene from methanol by using Aspen HYSYS software from the initial design to the improved design. Methods: Ethylene is produced in a two-step reaction. In an equilibrium reactor, the methanol is converted to dimethyl ether by an equilibrium reaction. The conversion of the produced dimethyl ether to ethylene is done in a conversion reactor. Changes have been made to improve the conditions and get closer to the actual process design done in the industry. The plug flow reactor has been replaced by the equilibrium reactor, and the distillation column was employed to separate the dimethyl ether produced from the reactor. Result and Conclusion: The effect of the various parameters on the ethylene production was investigated. Eventually, ethylene is

scholarly journals SELECTIVE SYNTHESIS OF LIGHT OLEFINS FROM DIMETHYL ETHER OVER ACIDIC SALTS OF H3PW12O40WITH 1,3,5-TRIAZINE

1982 ◽  
Vol 11 (8) ◽  
pp. 1275-1276 ◽  
Author(s):  
Takuo Hibi ◽  
Toshio Okuhara ◽  
Makoto Misono ◽  
Yukio Yoneda
Keyword(s):  
Dimethyl Ether ◽  
Light Olefins ◽  
Selective Synthesis

Effect of magnesium on the catalytic properties of polymetallic zeolite catalysts for conversion of dimethyl ether to light olefins

2020 ◽  
Vol 298 ◽  
pp. 110087 ◽  
Author(s):  
N.V. Kolesnichenko ◽  
Е.N. Khivrich ◽  
T.K. Obukhova ◽  
Т.I. Batova ◽  
G.N. Bondarenko
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Properties ◽  
Zeolite Catalysts ◽  
Light Olefins

scholarly journals Influence of Precursors on the Induction Period and Transition Regime of Dimethyl Ether Conversion to Hydrocarbons over ZSM-5 Catalysts

2019 ◽  
Vol 58 (36) ◽  
pp. 16479-16488 ◽  
Author(s):  
Toyin Omojola ◽  
Dmitry B. Lukyanov ◽  
Nikolay Cherkasov ◽  
Vladimir L. Zholobenko ◽  
André C. van Veen
Keyword(s):  
Induction Period ◽  
Dimethyl Ether ◽  
Transition Regime ◽  
Dimethyl Ether Conversion
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