Methanol synthesis in a novel axial-flow, spherical packed bed reactor in the presence of catalyst deactivation

2011 ◽  
Vol 89 (11) ◽  
pp. 2457-2469 ◽  
Author(s):  
M.R. Rahimpour ◽  
E. Pourazadi ◽  
D. Iranshahi ◽  
A.M. Bahmanpour
Keyword(s):  
Methanol Synthesis ◽  
Catalyst Deactivation ◽  
Axial Flow ◽  
Packed Bed ◽  
Packed Bed Reactor

Modeling of an axial flow, spherical packed-bed reactor for naphtha reforming process in the presence of the catalyst deactivation

2010 ◽  
Vol 35 (23) ◽  
pp. 12784-12799 ◽  
Author(s):  
D. Iranshahi ◽  
E. Pourazadi ◽  
K. Paymooni ◽  
A.M. Bahmanpour ◽  
M.R. Rahimpour ◽  
...  
Keyword(s):  
Catalyst Deactivation ◽  
Axial Flow ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Naphtha Reforming

Investigations of Hydrodynamics and Heat Transfers in a Modified Reactor Using Fluid Mixers

2013 ◽  
Vol 805-806 ◽  
pp. 1250-1256
Author(s):  
Prayut Jiamrittiwong ◽  
Karn Pana-Suppamassadu ◽  
Phavanee Narataruksa ◽  
Sabaithip Tungkamani ◽  
Nuwong Chollacoop
Keyword(s):  
Catalyst Deactivation ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Liquid Fuels ◽  
Mixed Gas ◽  
Static Mixers ◽  
Uniform Distributions ◽  
Temperature Distributions ◽  
Drop Flow ◽  
Heat Transfers

The performance of a packed-bed reactor typically used in Gas-to-Liquid (GTL) or Biomass-to-Liquid (BTL) technologies in producing liquid fuels was affected by unfavorable high pressure drop, flow and temperature maldistributions which in turn could cause severe catalyst deactivation, and result in inefficient reaction etc. A certain types of fluid mixers such as KenicsTM or Mixing & Stirring type static mixers had been suggested to improve the performance of this type of reactor. In order to design a proper modified reactor by mean of an installation of such mixing structures for the pilot plant in liquid fuel production via Fischer-Tropsch Synthesis (FTS) conducted at the RCC research center, this study had to characterize the hydrodynamics and heat transfers within a packed-bed modified by KenicsTM and Mixing & Stirring type static mixers. During the FTS, the syngas i.e. CO and H2 was fed through the bed of catalyst causing the temperature rise due to an exothermic enthalpy, and the flow and temperature distributions of mixed gas within the catalyst bed were influenced. The improved velocity and temperature distributions and heat transfers were exhibited by using such mixers e.g. rather uniform distributions and higher heat transfer coefficient. Thus, the better performance of the reactor could be expected.

scholarly journals On the Numerical Simulation of Packed Bed Membrane Reactors for Methanol Synthesis from CO2 and H2: Suitable Alternatives to Packed Bed Reactor Technology

2019 ◽  
Vol 7 ◽  
Author(s):  
William Andrés Mejía Galarza ◽  
Javier Herguido Huerta ◽  
Miguel Alejandro Menéndez Sastre
Keyword(s):  
Numerical Simulation ◽  
Potential Energy ◽  
Methanol Synthesis ◽  
Membrane Reactor ◽  
Packed Bed ◽  
Energy Carrier ◽  
Membrane Reactors ◽  
Packed Bed Reactor ◽  
Reactor Technology

Methanol is considered to be a potential energy carrier. Currently, its synthesis from CO2 is performed in conventional reactors, although its yield can be improved if a packed bed membrane reactor (PBMR) is used instead. The objective of this work is to select potential PBMRs as an alternative to the conventional ones.

A Novel Reactor Configuration for Industrial Methanol Production From the Synthesis Gas

2018 ◽  
Vol 141 (4) ◽  
Author(s):  
Payam Parvasi ◽  
Seyyed Mohammad Jokar
Keyword(s):  
Methanol Synthesis ◽  
Radial Flow ◽  
Cooling Water ◽  
Packed Bed ◽  
Optimization Methods ◽  
Packed Bed Reactor ◽  
Flow Reactors ◽  
Methanol Production ◽  
Reactor Models ◽  
The Cost

In this work, the methanol synthesis on a commercial industrial catalyst in a novel cylindrical radial flow packed-bed reactor is investigated. The adiabatic and nonadiabatic cylindrical radial flow reactors were proposed and modeled in this research. The proposed configuration has been compared with conventional reactor for methanol production. It leads to higher methanol production and lower pressure drop, with the same catalyst consumption. Furthermore, the results show that the nonadiabatic radial flow packed-bed reactor has a higher methanol content compared with the adiabatic one. The improvement in methanol production was studied by optimizing the essential parameters such as inlet temperatures of the feed and cooling water as well as the number of cooling tubes. The nonlinearity and complexity of the reactor models make the traditional optimization methods ineffective and improbable. Therefore, the process was optimized by genetic algorithm (GA) method, which is one of the most powerful methods. The optimum values for the number of cooling tubes, feed and cooling water temperatures were 308, 507.6 K, and 522.43 K, respectively. The optimization results showed that a new reactor design could be proposed to reduce the cost of methanol synthesis.

scholarly journals Membrane Reactor for Methanol Synthesis Using Si-Rich LTA Zeolite Membrane

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 505
Author(s):  
Masahiro Seshimo ◽  
Bo Liu ◽  
Hey Ryeon Lee ◽  
Katsunori Yogo ◽  
Yuichiro Yamaguchi ◽  
...  
Keyword(s):  
Methanol Synthesis ◽  
Membrane Reactor ◽  
Synthesis Method ◽  
Packed Bed ◽  
Zeolite Membrane ◽  
Packed Bed Reactor ◽  
Co2 Conversion ◽  
Experimental Conditions ◽  
Reaction Field ◽  
Lta Zeolite

We successfully demonstrated the effect of a membrane reactor for methanol synthesis to improve one-pass CO2 conversion. An Si-rich LTA membrane for dehydration from a methanol synthesis reaction field was synthesized by the seed-assisted hydrothermal synthesis method. The H2O permselective performance of the membrane showed 1.5 × 10−6 mol m−2 s−1 Pa−1 as H2O permeance and around 2,000 as selectivity of H2O/MeOH at 473 K. From the results of membrane reactor tests, the CO2 conversion of the membrane reactor was higher than that of the conventional packed-bed reactor under the all of experimental conditions. Especially, at 4 MPa of reaction pressure, the conversion using the membrane reactor was around 60%. In the case of using a packed-bed reactor, the conversion was 20% under the same conditions. In addition, the calculated and experimental conversion were in good agreement in both the case of the membrane reactor and packed-bed reactor.

scholarly journals Simulation of methanol production from residual biomasses in a Cu/ZnO/Al2O3 packed bed reactor

2020 ◽  
Author(s):  
Carlos Esteban Aristizabal-Alzate ◽  
Andrés Felipe Vargas-Ramírez ◽  
Pedro Nel Alvarado-Torres
Keyword(s):  
Pressure Drop ◽  
Heterogeneous System ◽  
Catalyst Deactivation ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Deactivation Model ◽  
Alcohol Production ◽  
Methanol Production ◽  
Ratio Effect ◽  
Agent Selection

This article aims to simulate an algorithm constructed in MATLAB to represent the catalytic conversion of SYNGAS into methanol in a packed-bed reactor, based on chemical kinetics for a heterogeneous system with a Cu/ZnO/Al2O3 as a catalyst, and complementary math and phenomenological models, as a pressure drop and catalyst deactivation. Model validation is developed, comparing reference results and the results by running the algorithm in MATLAB using a reference SYNGAS composition. Also, the constructed model considers a catalyst deactivation by sintering and pressure drop along the reactor.  Several parameters were evaluated to identify the pro conditions for methyl alcohol production; these parameters include the gasifying agent selection, the biomass and steam ratio effect, and the biomass origin.

Selective Oxidation of Ethylene in an Industrial Packed-Bed Reactor: Modelling, Analysis and Optimization

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
Omar Galan ◽  
Vincent G Gomes ◽  
Jose Romagnoli ◽  
Kian F Ngian
Keyword(s):  
Ethylene Oxide ◽  
Catalyst Deactivation ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Coolant Temperature ◽  
Modelling Analysis ◽  
Composition Profiles ◽  
Plant Data ◽  
Personnel Safety ◽  
Optimal Set

This work is focused on the modelling, analysis and optimization of industrial ethylene oxide production in a packed bed reactor. The aim is to identify the critical variables that maximize the reactor productivity in an existing facility without compromising personnel safety and equipment integrity. The chemical reactions involved are highly exothermic making the internal temperature control of this unit a challenging task. Temperature excursions at dangerous levels have been experienced due to variations in composition and temperature of fresh feed to the reactor. Therefore, the prediction of dynamic temperature and composition profiles in the reactor are important for its safe operation. The model we developed incorporates catalyst deactivation and the effect of an inhibitory agent: 1,2-dichloroethene. The model predictions were found to be in good agreement with the plant data. Our model-based optimization studies show that the optimal set point for the inlet coolant temperature is suitable for preventing reactor hot spots and maximizing ethylene oxide selectivity. The heat integration aspects of the process were addressed.

Characteristics of an Integrated Micro Packed Bed Reactor-Heat Exchanger for methanol synthesis from syngas

2011 ◽  
Vol 167 (2-3) ◽  
pp. 496-503 ◽  
Author(s):  
Hamidreza Bakhtiary-Davijany ◽  
Fatemeh Hayer ◽  
Xuyen Kim Phan ◽  
Rune Myrstad ◽  
Hilde J. Venvik ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Methanol Synthesis ◽  
Packed Bed ◽  
Packed Bed Reactor

scholarly journals Polymer–Ceramic Composite Membranes for Water Removal in Membrane Reactors

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 472
Author(s):  
Ester Juarez ◽  
Javier Lasobras ◽  
Jaime Soler ◽  
Javier Herguido ◽  
Miguel Menéndez
Keyword(s):  
Methanol Synthesis ◽  
Membrane Reactor ◽  
Ceramic Composite ◽  
Composite Membranes ◽  
Packed Bed ◽  
Co2 Hydrogenation ◽  
Membrane Reactors ◽  
Packed Bed Reactor ◽  
Water Removal ◽  
Harsh Conditions

Methanol can be obtained through CO2 hydrogenation in a membrane reactor with higher yield or lower pressure than in a conventional packed bed reactor. In this study, we explore a new kind of membrane with the potential suitability for such membrane reactors. Silicone–ceramic composite membranes are synthetized and characterized for their capability to selectively remove water from a mixture containing hydrogen, CO2, and water at temperatures typical for methanol synthesis. We show that this membrane can achieve selective permeation of water under such harsh conditions, and thus is an alternative candidate for use in membrane reactors for processes where water is one of the products and the yield is limited by thermodynamic equilibrium.

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