scholarly journals Applicability of Membrane Reactor For Producing Environment Friendly Fuel Additive Glycerol Carbonate

2021 ◽  
Keyword(s):  
Membrane Reactor ◽  
Polymeric Membranes ◽  
Glycerol Carbonate ◽  
Fuel Additive ◽  
Catalytic Membrane ◽  
Environment Friendly ◽  
Catalytic Membranes ◽  
Waste Glycerol ◽  
Reaction Conversion ◽  
Chitosan Biopolymer

<p>Production of glycerol carbonate (GLC) that is a fuel additive from green solvent dimethyl carbonate (DMC) and biodiesel by-product glycerin is environmentally friendly synthesis. The usage of waste glycerol from biodiesel plant makes the production cost lower. When the membrane aided technique is used for the production of GLC, this technique will be very promising technique. Because membrane applications are environment and energy friendly economical applications. The production with membrane aided can be made by catalytic membrane. In this study, catalytic membranes were developed from synthetic and natural materials to produce GLC by transesterification reaction between glycerol and DMC. The reaction gives methanol as byproduct. The catalytic membranes were used methanol retentive material for increasing the reaction conversion of glycerol to glycerol carbonate. The synthetic catalytic membrane materials were poly(vinylalcohol)(PVA), poly(vinylpyrrolidone) (PVP), Poly(4-vinylpyridine) (P4VP) polymers and CaO. The natural catalytic membrane material was chitosan biopolymer and waste eggshell. The properties of by-product methanol retentive of the polymeric membranes were determined from sorption tests. The tests were shown that the catalytic membranes would sorp by-product methanol during reaction. This pointed out that GLC synthesis can be made by membrane aided technique such as membrane reactor.</p>

scholarly journals Hydrogenation of Maltose in Catalytic Membrane Reactor for Maltitol Production

2018 ◽  
Vol 156 ◽  
pp. 08008 ◽  
Author(s):  
I.G.B.N. Makertihartha ◽  
Khoiruddin ◽  
Ahmad N. Hakim ◽  
P.T.P. Aryanti ◽  
I.G. Wenten
Keyword(s):  
Membrane Reactor ◽  
Ceramic Membrane ◽  
Operating Pressure ◽  
Catalytic Membrane ◽  
Catalytic Membrane Reactor ◽  
Batch Mode ◽  
Food Industries ◽  
Reaction Conversion ◽  
Preliminary Study ◽  
Sugar Replacement

Maltitol is one of the low-calorie sweeteners which has a major role in food industries. Due to its characteristics of comparable sweetness level to sucrose, maltitol can be a suitable sugar replacement. In this work, catalytic membrane reactor (CMR) was examined in maltitol production through hydrogenation of maltose. Commercial ceramic membrane impregnated with Kalcat 8030 Nickel was used as the CMR. The reaction was conducted at a batch mode operation, 95 to 110°C of temperature, and 5 to 8 bar of pressure. In the range of working conditions used in this study, up to 47% conversion was achieved. The reaction conversion was significantly affected by temperature and pressure. Results of this preliminary study indicated that CMR can be used for hydrogenation of maltose with good performance under a relatively low operating pressure.

scholarly journals Hydrogen and Oxygen Production via Water Splitting in a Solar-Powered Membrane Reactor—A Conceptual Study

Hydrogen ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 18-32
Author(s):  
Silvano Tosti ◽  
Alfonso Pozio ◽  
Luca Farina ◽  
Alessia Santucci
Keyword(s):  
Water Splitting ◽  
Membrane Reactor ◽  
Practical Interest ◽  
Reaction Products ◽  
Critical Data ◽  
A Value ◽  
Reaction Conversion ◽  
Water Feed ◽  
Solar Powered ◽  
Conceptual Study

Among the processes for producing hydrogen and oxygen from water via the use of solar energy, water splitting has the advantage of being carried out in onestep. According to thermodynamics, this process exhibits conversions of practical interest at very high temperatures and needs efficient separation systems in order to separate the reaction products, hydrogen and oxygen. In this conceptual work, the behavior of a membrane reactor that uses two membranes perm-selective to hydrogen and oxygen is investigated in the temperature range 2000–2500 °C of interest for coupling this device with solar receivers. The effect of the reaction pressure has been evaluated at 0.5 and 1 bar while the permeate pressure has been fixed at 100 Pa. As a first result, the use of the membrane perm-selective to oxygen in addition to the hydrogen one has improved significantly the reaction conversion that, for instance, at 0.5 bar and 2000 °C, moves from 9.8% up to 18.8%. Based on these critical data, a preliminary design of a membrane reactor consisting of a Ta tubular membrane separating the hydrogen and a hafnia camera separating the oxygen is presented: optimaloperating temperature of the reactor results in being around 2500 °C, a value making impracticable its coupling with solar receivers even in view of an optimistic development of this technology. The study has verified that at 2000 °C with a water feed flow rate of 1000 kg h−1 about 200 and 100 m3 h−1 of hydrogen and oxygen are produced. In this case, a surface of the hafnia membrane of the order of hundreds m2 is required: the design of such a membrane device may be feasible when considering special reactor configurations.

The selective oxidation of benzyl alcohol using a novel catalytic membrane reactor

2002 ◽  
Vol 4 (5) ◽  
pp. 459-460 ◽  
Author(s):  
David W. Hall ◽  
Georgia Grigoropoulou ◽  
James H. Clark ◽  
Keith Scott ◽  
Roshan J. J. Jachuck
Keyword(s):  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Membrane Reactor ◽  
Catalytic Membrane ◽  
Catalytic Membrane Reactor ◽  
Oxidation Of Benzyl Alcohol

Asymmetric nickel hollow fibres as the catalytic membrane reactor for CO2 hydrogenation into syngas

2019 ◽  
Vol 55 (29) ◽  
pp. 4226-4229 ◽  
Author(s):  
Mingming Wang ◽  
Xiaoyao Tan ◽  
Xiaobin Wang ◽  
Bo Meng ◽  
Shaomin Liu
Keyword(s):  
Membrane Reactor ◽  
Skin Layer ◽  
Single Step ◽  
Co2 Hydrogenation ◽  
Catalytic Membrane ◽  
Porous Substrate ◽  
Catalytic Membrane Reactor ◽  
Hollow Fibres

Herein, we report the development of highly asymmetric Ni hollow fibres with a dense skin layer integrated on a porous substrate by a single-step spinning and sintering technique.

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