A hydrogen economy: opportunities and challenges

Tseng, Phillip; Lee, John; Friley, Paul

doi:10.1016/j.energy.2004.07.015

Cited by 157 publications

(64 citation statements)

References 2 publications

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“…Biomass is an abundant renewable resource capable of supporting the future H 2 economy [2,4,7]. In recent studies made by the Biomass R&D Technical Advisory Committee (BTAC) of the US Department of Energy and Agriculture [8] it is reported that biomass now exceeds hydropower as the largest potential domestic source of renewable energy.…”

Section: Introductionmentioning

confidence: 99%

“…. H 2 is a valuable commodity, its main uses being in the chemical industry, petroleum refining, ammonia production and as rocket fuel with a total world annual consumption of more than 50 million tonnes, with a market value of $120 billion in 2010 and 15% annual growth [2][3][4]. The potential use of H 2 as a major power source for stationary applications and for the transportation industry will considerably increase its demand [1].…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal hydrolysis of starch with CO2 and detoxification of the hydrolysates with activated carbon for bio-hydrogen fermentation

Orozco

Redwood

Leeke

et al. 2012

International Journal of Hydrogen Energy

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The imminent use of hydrogen as an energy vector establishes the need for sustainable production technologies based on renewable resources. Starch is an abundant renewable resource suitable for bio-hydrogen generation. It was hypothesised that starch hydrolysates from a large (250 mL) hydrothermal reactor could support bioH 2 fermentation without inhibition by toxic byproducts.Starch was hydrolysed at high concentrations (40-200 g.L -1 ) in hot compressed water (HCW) with CO 2 at 30 bar in a 250 mL reactor, the largest so far for polysaccharide hydrolysis, at 180-235 °C, 15 min. Hydrolysates were detoxified with activated carbon (AC) and tested in biohydrogen fermentations. The maximum yield of glucose was 548 g.kg starch -1 carbon at 200 °C. 5-hydroxymethyl furfural, the main fermentation inhibitor, was removed by AC to support 70% more hydrogen production than the untreated hydrolysates. The potential utilization of starch hydrolysates from HCW treatment for upscaled fermentations is promising.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrothermal hydrolysis of starch with CO2 and detoxification of the hydrolysates with activated carbon for bio-hydrogen fermentation

Orozco

Redwood

Leeke

et al. 2012

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

show abstract

“…In this case, transitioning to a hydrogen economy will require economic incentives that encourage implementing new technologies and then identifying niche markets where segments of the economy can be introduced without the incentives. 34 On the other hand, the United States could transition to a hydrogen economy in a revolutionary manner, with a strong lead by government. "If we set our minds to it, we could accomplish a hydrogen economy by 2010" 35 , but it will take the level of effort of an Apollo project.…”

Section: How Do We Transition?mentioning

confidence: 99%

“…Their purpose was to "dynamically simulate the effects of a hydrogen economy on the energy sector, capture the interactions between hydrogen-and petroleum-based fuels, and identify the social costs and benefits of the transformation to a hydrogen economy." 29 Using conservative assumptions, not the least of which is a modest 3% annual rise in the price of oil, they limited their analysis to a hydrogen economy that might stem from the most likely sources of hydrogen production -coal, natural gas, biomass and electrolysis. They report,…”

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confidence: 99%

Conversion to a Hydrogen Fuel Transportation Industry, Incremental Route or Direct Route

King¹

2005

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“…Thus, from its life cycle point of view, hydrogen is environmentally friendly. In many countries, such as the United States, China, Japan, Australia, Germany, Turkey, UK, et al, the importance of hydrogen economy has been recognized (Tseng et al, 2005;Sherif et al, 2005;Winter, 2005). In order to realize hydrogen economy, one of the challenges need to be resolved is to store hydrogen efficiently, safely, and economically.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Hydrogen Storage Technologies

2006

Energy Exploration & Exploitation

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How to store hydrogen efficiently, economically and safely is one of the challenges to be overcome to make hydrogen an economic source of energy. This paper presents an overview of present hydrogen storage technologies, namely, high-pressure gas compression, liquefaction, metal hydride storage, and carbon nanotube adsorption. The energy efficiency, economic aspect, environmental and safety issues of various hydrogen storage technologies were compared. Presently, high-pressure gas compression is favorable due to its high energy efficiency as well as low capital and operation costs. Liquefaction is mainly employed in space applications because of its high volumetric and gravimetric efficiency. The disadvantages are low energy efficiency and high cost. Due to their high volumetric efficiency, metal hydride storage and carbon nanotube adsorption are promising hydrogen storage technologies and are expected to play a key role in hydrogen economy in the future.

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A hydrogen economy: opportunities and challenges

Cited by 157 publications

References 2 publications

Hydrothermal hydrolysis of starch with CO2 and detoxification of the hydrolysates with activated carbon for bio-hydrogen fermentation

Hydrothermal hydrolysis of starch with CO2 and detoxification of the hydrolysates with activated carbon for bio-hydrogen fermentation

Conversion to a Hydrogen Fuel Transportation Industry, Incremental Route or Direct Route

An Overview of Hydrogen Storage Technologies

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