Advances in Environmental Biology, 8(11) Special 2014, Pages: 1490-1500 AENSI Journals Advances in Environmental Biology ISSN-1995-0756 EISSN-1998-1066 Journal home page: http://www.aensiweb.com/AEB/ Corresponding Author: Farhad Shahraki, University of Sistan and Balouchestan, Iran Tel: 0098-9174323232; E-mail: sardashtib@yahoo.com Purification of Hydrogen by Absorption and Examination of Absorption Kinetics and Absorbers Type Mohammad Taghi Falahati, Farhad Shahraki, Mohammad Reza Sardashti Birjandi Department of Chemical Engineering, University of Sistan and Baluchestan, Iran ARTICLE INFO ABSTRACT Article history: Received 11 August 2014 Received in revised form 21 September 2014 Accepted 1 October 2014 Available online 17 October 2014 Keywords: Hydrogen Methanol-Water Vapor Reaction Catalyst-Bed Reactor Synthetic Background: Nowadays, environmental issues and increasingly depleting fossil fuels have shifted attentions to alternative energy sources. Hydrogen is one of such energy sources which can be used in transportation. Various approaches have been proposed for producing and purifying hydrogen. One of these approaches is producing hydrogen through the conversion reaction of methanol and water vapor in the catalyst-bed reactor. Since this process is performed in mild conditions, it has attracted the attentions of various researchers in energy production. Objective: In this project, as an essential and significant source of energy, hydrogen is characterized. Then, various methods of producing and purifying hydrogen and their advantages, disadvantages, and costs are discussed. Method: The following sections focus on the production of hydrogen through the conversion reaction of methanol and water vapor and discuss the stages of the process, the proposed syntheses, various adopted catalysts, and their production methods. Then, the process is simulated using the experimental data derived from a creditable study. Results: The comparison of the simulation results and those of the aforementioned study revealed that they are compatible. After simulation, the influences of various parameters (temperature, the length of the reactor, feed flow rate, and feed percentage composition) on the mole fraction of hydrogen are studied. A final simulation was conducted based on the results and an attempt was made to raise the amount of hydrogen in the product. Finally, the mole fraction of hydrogen was raised from %23 to %60. © 2014 AENSI Publisher All rights reserved. To Cite This Article: Mohammad Taghi Falahati, Farhad Shahraki, Mohammad Reza Sardashti Birjandi., Purification of Hydrogen by Absorption and Examination of Absorption Kinetics and Absorbers Type. Adv. Environ. Biol., 8(11), 1490-1500, 2014 INTRODUCTION Methanol/Water Vapor Reaction in Catalyst-Bed Reactor to Produce Hydrogen: Producing hydrogen through the reaction of methanol and water vapor is economic for producing the hydrogen used in various ways including fuel cells. It is a short and effective method for reaching the optimal product: This reaction occurs at low temperatures within the range of 200 to 300 ˚c on the catalys t bed. In addition to hydrogen, carbon dioxide, and nominal amounts of carbon monoxide (less than one percent) are produced as byproducts [9], [12]. Thus, hydrogen is occasionally introduced as the source of liquid hydrogen. Over the past decade, considerable attention has been paid to this reaction to produce hydrogen for various purposes such as fuel cells. Recently, methanol has been proposed as a good feed for a number of chemical processes [15]. Such applications require catalysts with high activity, selection, and resistance under the reaction conditions [10, 14]. Hence, an essential issue regarding this process is the type of the catalyst, its specifications, and production process. This is discussed in detail in 3-3. While designing the reactor, it is essential to consider the catalyst bed used in the methanol/water vapor reaction, the synthetics of the reaction in specifying the process, and especially the size of the reactor [16]. Therefore, an essential issue in this process is the investigation of the reaction synthesis, which is discussed in detail in 3-4. ) 200 ( / 57 3 2 2 2 3 C at mol kj H H CO O H OH CH      