scholarly journals Co-production of pure hydrogen, carbon dioxide and nitrogen in a 10 kW fixed-bed chemical looping system

2020 ◽  
Vol 4 (3) ◽  
pp. 1417-1426 ◽  
Author(s):  
Sebastian Bock ◽  
Robert Zacharias ◽  
Viktor Hacker
Keyword(s):  
Carbon Dioxide ◽  
High Purity ◽  
Fixed Bed ◽  
Pure Hydrogen ◽  
Chemical Looping ◽  
System P ◽  
Pure Carbon ◽  
Pure Carbon Dioxide ◽  
High Purity Hydrogen

Fixed-bed chemical looping for the generation of high purity hydrogen with sequestration of pure carbon dioxide and nitrogen.

scholarly journals Experimental study on high-purity hydrogen generation from synthetic biogas in a 10 kW fixed-bed chemical looping system

RSC Advances ◽  
2019 ◽  
Vol 9 (41) ◽  
pp. 23686-23695 ◽  
Author(s):  
Sebastian Bock ◽  
Robert Zacharias ◽  
Viktor Hacker
Keyword(s):  
Experimental Study ◽  
High Purity ◽  
Hydrogen Generation ◽  
Fixed Bed ◽  
Chemical Looping ◽  
Experimental Proof ◽  
System P ◽  
High Purity Hydrogen

Experimental proof of synthetic biogas utilization for high-purity hydrogen generation (99.998%) with a 10 kW fixed-bed chemical looping system.

Hydrogen Generation by Gasification of Rice Husk in an Integrated Fuel Cell Processor

2006 ◽  
Author(s):  
Kuen-Song Lin ◽  
Chi-Nan Ku ◽  
Chien-Te Hsieh ◽  
Shih-Hung Chan ◽  
Ay Su
Keyword(s):  
Fuel Cell ◽  
Rice Husk ◽  
High Purity ◽  
Hydrogen Generation ◽  
Fixed Bed ◽  
Reaction System ◽  
Pure Hydrogen ◽  
Fuel Gas ◽  
Cold Gas Efficiency ◽  
High Purity Hydrogen

Fuel processing is defined as conversion of any biomass, hydrocarbons or organics to a fuel gas reformate suitable for fuel cell (FC) anode reaction system. Rice husk is one of the potential organic sources of hydrogen and heat energy that can be generated from rice husk gasification processes. The high-purity hydrogen fed to the FC stack for power generation makes waste rice husk utilization system economically and environmentally attractive. Thus, the main objectives of this work were to develop a rice husk gasification process and the potential applications of high-purity hydrogen from syngas (CO and H2) on stationary power generator of FC system. In the lab-scale fixed-bed and bench-scale downdraft experimental approaches, gasification of rice husk was accompanied by a substantial production of syngas at 760–900 K. It was found that in addition to over 90% of syngas generation, approximately 7.17 × 105 kcal/hr of thermal energy was recovered and the cold gas efficiency was 78–86% when the gasifier was operated at O/C atomic ratios between 1.1 and 1.3. The product syngas can be further separated by pressure swing adsorption and Pd membrane purification units, which effectively purified and generated 99.999% pure hydrogen in an integrated FC Processor. Finally, cost or benefit analysis of a rice husk gasifier of 10-TPD (tons per day) was also performed to confirm the economic potential for such a recycling practice and determine if further development of stationary FC system would be warranted.

AN ALGORITHM FOR OPTIMAL FERTILIZATION WITH PURE CARBON DIOXIDE IN GREENHOUSES

2012 ◽  
pp. 119-124 ◽  
Author(s):  
C. Stanghellini ◽  
J. Bontsema ◽  
A. de Koning ◽  
E.J. Baeza
Keyword(s):  
Carbon Dioxide ◽  
Pure Carbon ◽  
Pure Carbon Dioxide

Thermal Conductivity and Prandtl Number of Carbon Dioxide and Carbon-Dioxide Air Mixtures at One Atmosphere

1961 ◽  
Vol 83 (2) ◽  
pp. 125-131 ◽  
Author(s):  
Jerome L. Novotny ◽  
Thomas F. Irvine
Keyword(s):  
Carbon Dioxide ◽  
Thermal Conductivity ◽  
Prandtl Number ◽  
Maximum Error ◽  
Intermolecular Force ◽  
Temperature Range ◽  
Average Temperature ◽  
Pure Carbon ◽  
Prandtl Numbers ◽  
Pure Carbon Dioxide

By measuring laminar recovery factors in a high velocity gas stream, experimental determinations were made of the Prandtl number of carbon dioxide over a temperature range from 285 to 450 K and of carbon-dioxide air mixtures at an average temperature of 285 K with a predicted maximum error of 1.5 per cent. Thermal conductivity values were deduced from these Prandtl numbers and compared with literature values measured by other methods. Using intermolecular force constants determined from literature experimental data, viscosities, thermal conductivities, and Prandtl numbers were calculated for carbon-dioxide air mixtures over the temperature range 200 to 1500 deg for mixture ratios from pure air to pure carbon dioxide.

scholarly journals Direct Carbon Fuel Cell-Cleaner and Efficient Future Power Generation Technology

2019 ◽  
Vol 6 (1) ◽  
pp. 14-30
Author(s):  
Uzair Ibrahim ◽  
Ahsan Ayub
Keyword(s):  
Carbon Dioxide ◽  
Fuel Cell ◽  
Fossil Fuels ◽  
High Efficiency ◽  
Thermal Power ◽  
Gaseous State ◽  
Thermal Plant ◽  
Direct Carbon Fuel Cell ◽  
Pure Carbon ◽  
Pure Carbon Dioxide

Increasing greenhouse effect due to the burning of fossil fuels has stirred the attention of researchers towards cleaner and efficient technologies. Direct carbon fuel cell (DCFC) is one such emerging technology that could generate electricity from solid carbon like coal and biogas in a more efficient and environmental-friendly way. The mechanism involves electrochemical oxidation of carbon to produce energy and highly pure carbon dioxide. Due to higher purity, the produced carbon dioxide can be captured easily to avoid its release in the environment. The carbon dioxide is produced in a gaseous state while the fuel used is in a solid state. Due to different phases, all of the fuel can be recovered from the cell and can be reused, ensuring complete (100%) fuel utilization with no fuel losses. Moreover, DCFC operates at a temperature lower than conventional fuel cells. The electric efficiency of a DCFC is around 80% which is nearly double the efficiency of coal thermal plant. In addition, DCFC produces pure carbon dioxide as compared to the thermal power plant which reduces the cost of CO2 separation and dumping. In different types of DCFCs, molten carbon fuel cell is considered to be superior due to its low operating temperature and high efficiency. This paper provides a comprehensive review of the direct carbon fuel cell technology and recent advances in this field. The paper is focused on the fundamentals of fuel cell, history, operating principle, its types, applications, future challenges, and development.

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