Abstract
Abstract The increasing demand for H 2 for heavy oil upgrading, desulfurization and upgrading of conventional petroleum, and for production of ammonium, in addition to the projected demand for H 2 as a transportation fuel and portable power, will require H 2 production on a massive scale. Increased production of H 2 by current technologies will consume greater amounts of conventional hydrocarbons (primarily natural gas), which in turn will generate greater greenhouse gas emissions. Production of H 2 from renewable sources derived from agricultural or other waste streams offers the possibility to contribute to the production capacity with lower or no net greenhouse gas emissions (without carbon sequestration technologies), increasing the flexibility and improving the economics of distributed and semi-centralized reforming. Electrolysis, thermocatalytic, and biological production can be easily adapted to on-site decentralized production of H 2 , circumventing the need to establish a large and costly distribution infrastructure. Each of these H 2 production technologies, however, faces technical challenges, including conversion efficiencies, feedstock type, and the need to safely integrate H 2 production systems with H 2 purification and storage technologies.
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