Enhancement of synthesis gas and methanol production by flare gas recovery utilizing a membrane based separation process

Khanipour, Mina; Mirvakili, A.; Bakhtyari, Ali; Farniaei, Mehdi; Rahimpour, Mohammad Reza

doi:10.1016/j.fuproc.2017.06.008

Cited by 47 publications

(10 citation statements)

References 80 publications

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“…In addition, Agahzamin et al have evaluated the recovery of the purge gas to the auto-thermal reformer (ATR). In both studies, results show that by the recovery of the purge gas not only CO 2 emission into the environment is reduced, but also synthesis gas and methanol production enhance very well in terms of quality and quantity, and it is economical as well [13,14]. A large portion of flare gas contains CO, H 2 and CO 2 which can be used in the production of methanol.…”

Section: Recycling Of the Flare Gasmentioning

confidence: 99%

Hydrogen and carbon dioxide recovery from the petrochemical flare gas to methanol production using adsorption and absorption combined high-efficient method

et al. 2019

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Today, one of the challenging issues all over the world is the global warming which can be attributed to the emission of greenhouse gases into the environment as well as burning of gases in flare gas stream of industrial units. The latter can not only cause environmental problems but also is accompanied by wasting a great deal of energy. To deal with the aforementioned issue, the flare gas stream can be recycled after separating some species. In this investigation, the objective is to separate CO 2 and H 2 from the flare gas in addition to methanol production. In this regard, a separation with sorbent/solvent method is used which is divided into two stages: (1) H 2 separation by sorbent, (2) CO 2 separation by monoethanolamine solvent. From the obtained results in this study, in the first stage, H 2 and CO 2 can be purified up to 75% and 99.83%, respectively. Beside, methanol synthesis is compared in three different cases: (1) industrial unit, (2) CO 2 is fed into the reactor instead of CO, and (3) CO 2 and H 2 are fed to the reactor with stoichiometric coefficients. The obtained methanol production of the case (1) is approximately close to that of the case (3) and it is reduced 4% in case (3).

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Section: Recycling Of the Flare Gasmentioning

confidence: 99%

Hydrogen and carbon dioxide recovery from the petrochemical flare gas to methanol production using adsorption and absorption combined high-efficient method

et al. 2019

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“…In present times, hydrogen gas separation is carried out by some of these processes, namely, pressure swing adsorption, cryogenic distillation, and membrane separation . However, the former two techniques are energy intensive and require high capital investments . On the other hand, membrane technology comes with the feasibility of abundant raw materials, facile modification, economical processing capabilities, and environmental friendliness. , Membrane technology has provided the means for hydrogen separation and is already in use for retrieval of hydrogen from hydrocarbon streams and ammonia streams in industrial applications .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Cellulose Acetate Film through Blending Technique with Palladium Acetate for Hydrogen Gas Separation

et al. 2020

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With the growing demand for fuel and simultaneous pollution caused by the use of traditional fuel sources, the quest for clean energy sources is the biggest challenge forward. This has paved a way for the hydrogen economy. Herein, the successful fabrication of novel cellulose acetate (CA)/palladium acetate (PdOAc)2 blend membranes for hydrogen gas separation with respect to carbon dioxide and methane gases is reported. Pristine CA and CA/(PdOAc)2 blend membranes with various concentrations (0.5, 0.75, and 1 wt %) of (PdOAc)2 were prepared via vapor-induced phase separation (VIPS) method. The membranes were investigated through various techniques such as attenuated total reflectance infrared spectroscopy (ATR-IR) spectroscopy to study the interaction between the CA and (PdOAc)2. Then, a morphological study by field emission scanning electron microscopy (FESEM) showcased homogeneous blending between CA and (PdOAc)2. X-ray diffraction (XRD) patterns revealed the characteristic peaks denoting (PdOAc)2 and change in the crystallinity of the membranes upon blending. The alteration in the mechanical strength of the blends due to the incorporation of (PdOAc)2 into the CA matrix was deliberated by tensile strength analysis. Gas experiments showcased permeability in the descending order of H2 > CO2 > CH4, with a selectivity of 2.02, 68.5, and 34 for H2/CO2, H2/CH4, and CO2/CH4 separation respectively for the optimum membrane. The study was able to demonstrate a simple yet effective way to fabricate membranes with decent separation efficiency for hydrogen gas, giving a boost to the ongoing expedition to use hydrogen gas as a fuel.

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“…It can be used as a mixture or can be separated into its constituents before use [10]. State-of-the-art shows that the most efficient method for production of syngas is the reforming processes [11]. Thus, one of the aims of this study is to highlight the syngas produced from MSW gasification.…”

Section: Introductionmentioning

confidence: 99%

“…However, the separation of gases by the membrane is one of the most flexible separation processes. Amongst many available techniques, such as distillation, crystallization, absorption, or solvent extraction for chemical separations, membrane technology is economically competitive for administering alternative separation technologies [11,13]. Opportunities thrive to extend membrane markets for gas separations although the existing membrane materials, membrane structures, and formation processes are inadequate for thorough utilization of these opportunities, and the requirements for the viability of membranes vary considerably with each application [14].…”

Section: Introductionmentioning

confidence: 99%

Process Design Characteristics of Syngas (CO/H2) Separation Using Composite Membrane

Poudel

Choi

2019

Sustainability

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The effectiveness of gas separation membranes and their application is continually growing owing to its simpler separation methods. In addition, their application is increasing for the separation of syngas (CO and H 2 ) which utilizes cryogenic temperature during separation. Polymers are widely used as membrane material for performing the separation of various gaseous mixtures due to their attractive perm-selective properties and high processability. This study, therefore, aims to investigate the process design characteristics of syngas separation utilizing polyamide composite membrane with polyimide support. Moreover, characteristics of CO/H 2 separation were investigated by varying inlet gas flow rates, stage cut, inlet gas pressures, and membrane module temperature. Beneficial impact in CO and H 2 purity were obtained on increasing the flow rate with no significant effect of increasing membrane module temperature and approximately 97% pure CO was obtained from the third stage of the multi-stage membrane system.

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Enhancement of synthesis gas and methanol production by flare gas recovery utilizing a membrane based separation process

Cited by 47 publications

References 80 publications

Hydrogen and carbon dioxide recovery from the petrochemical flare gas to methanol production using adsorption and absorption combined high-efficient method

Hydrogen and carbon dioxide recovery from the petrochemical flare gas to methanol production using adsorption and absorption combined high-efficient method

Fabrication of Cellulose Acetate Film through Blending Technique with Palladium Acetate for Hydrogen Gas Separation

Process Design Characteristics of Syngas (CO/H2) Separation Using Composite Membrane

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