Process intensification by applying chemical looping in natural gas to dimethyl ether conversion process—Implications for process design education

RWGS reaction thermodynamics, mechanisms and kinetics. Process design and process intensification – from lab scale to industrial applications and CO2 value chains. Pathways for further improvement of catalytic systems, reactor and process design.

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Study on the interchangeability between low calorific value coalbed methane blended with hydrogen, dimethyl ether and natural gas

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/766/1/012041 ◽

2021 ◽

Vol 766 (1) ◽

pp. 012041

Author(s):

Zhou Yu ◽

Lin Mandi

Keyword(s):

Natural Gas ◽

Dimethyl Ether ◽

Coalbed Methane ◽

Calorific Value

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Energy and Exergy Analyses of a Power Plant With Carbon Dioxide Capture Using Multistage Chemical Looping Combustion

Journal of Energy Resources Technology ◽

10.1115/1.4035057 ◽

2016 ◽

Vol 139 (3) ◽

Cited By ~ 14

Author(s):

Bilal Hassan ◽

Oghare Victor Ogidiama ◽

Mohammed N. Khan ◽

Tariq Shamim

Keyword(s):

Carbon Dioxide ◽

Power Plant ◽

Natural Gas ◽

Co2 Capture ◽

Power Plants ◽

Waste Heat ◽

Chemical Looping Combustion ◽

Chemical Looping ◽

Operating Pressure ◽

Efficiency Gain

A thermodynamic model and parametric analysis of a natural gas-fired power plant with carbon dioxide (CO2) capture using multistage chemical looping combustion (CLC) are presented. CLC is an innovative concept and an attractive option to capture CO2 with a significantly lower energy penalty than other carbon-capture technologies. The principal idea behind CLC is to split the combustion process into two separate steps (redox reactions) carried out in two separate reactors: an oxidation reaction and a reduction reaction, by introducing a suitable metal oxide which acts as an oxygen carrier (OC) that circulates between the two reactors. In this study, an Aspen Plus model was developed by employing the conservation of mass and energy for all components of the CLC system. In the analysis, equilibrium-based thermodynamic reactions with no OC deactivation were considered. The model was employed to investigate the effect of various key operating parameters such as air, fuel, and OC mass flow rates, operating pressure, and waste heat recovery on the performance of a natural gas-fired power plant with multistage CLC. The results of these parameters on the plant's thermal and exergetic efficiencies are presented. Based on the lower heating value, the analysis shows a thermal efficiency gain of more than 6 percentage points for CLC-integrated natural gas power plants compared to similar power plants with pre- or post-combustion CO2 capture technologies.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.347-353.3681 ◽

2011 ◽

Vol 347-353 ◽

pp. 3681-3684 ◽

Cited By ~ 1

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.

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