scholarly journals Decentralized Production of Hydrogen for Residential PEM Fuel Cell from Piped Natural Gas by Low Temperature Steam - Methane Reforming Using a Novel Sorption Enhanced Reaction Concept

Author(s):  
Michael Beaver ◽  
Shivaji Sircar
2017 ◽  
Vol 419 ◽  
pp. 788-794 ◽  
Author(s):  
Sang Moon Lee ◽  
Jong Min Won ◽  
Geo Jong Kim ◽  
Seung Hyun Lee ◽  
Sung Su Kim ◽  
...  

Author(s):  
Deborah A. Udousoro ◽  
Cliff Dansoh

One of the challenges faced in the United Kingdom energy market is the need to supply clean energy at affordable prices. Hydrogen can be used as an energy carrier and has been applied as fuel for automotive engines. Several technologies exist for the production of hydrogen fuel but their acceptance is dependent on the cost and impact on the environment. Steam methane reforming is an established hydrogen production process in the UK. Currently there are 8 fuel cell buses that run on hydrogen fuel but the hydrogen used is produced via steam methane reforming. Production of hydrogen through solar powered electrolysis is a cleaner option but at what economic cost? In this paper, cost analysis is conducted to compare the cost of producing the amount of hydrogen needed to run the RV1 fuel cell buses at Lea Interchange bus garage through steam methane reforming of natural gas to solar powered water electrolysis. From the analysis it was discovered that levelised energy cost of solar powered electrolysis system is 15 times the levelised energy cost of steam methane reforming of natural gas. Thus, the production of hydrogen is not economically feasible through solar powered water electrolysis system.


Author(s):  
Marco Gambini ◽  
Michela Vellini

In this paper two options for H2 production, by means of natural gas, are presented and their performances are evaluated when they are integrated with advanced H2/air cycles. In this investigation two different schemes have been analysed: an advanced combined cycle power plant (CC) and a new advanced mixed cycle power plant (AMC). The two methods for producing H2 are as follows: • steam methane reforming: it is the simplest and potentially the most economic method for producing hydrogen in the foreseeable future; • partial oxidation of methane: it could offer an energy advantage because this method reduces energy requirement of the reforming process. These hydrogen production plants require material and energetic integrations with power section and the best interconnections must be investigated in order to obtain good overall performance. With reference to thermodynamic and economic performance, significant comparisons have been made between the above introduced reference plants. An efficiency decrease and an increase in the cost of electricity has been obtained when power plants are equipped with a natural gas decarbonisation section. The main results of the performed investigation are quite variable among the different H2 production technologies here considered: the efficiency decreases in a range of 5.5 percentage points to nearly 10 for the partial oxidation of the natural gas and in a range of 8.8 percentage points to over 12 for the steam methane reforming. The electricity production cost increases in a range of about 41–42% for the first option and in a range of about 34–38% for the second one. The AMC, coupled with partial oxidation, stands out among the other power plant solutions here analysed because it exhibits the highest net efficiency and the lowest final specific CO2 emission. In addition to this, economic impact is favourable when AMC is equipped with systems for H2 production based on partial oxidation of natural gas.


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