Gasification biomass in supercritical water as hydrogen production technology

• Autor(a) principal: Barros, Thiago Vinícius
• Data de Publicação: 2022
• Outros Autores: Lopez, Guilherme de Souza, Santos, Renivaldo José dos, Parizi, Marcela Prado Silva, Cardozo-Filho, Lucio, Ferreira-Pinto, Leandro
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Research, Society and Development
• Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/31296
• topic: Agua; Supercrítico; Hidrógeno; Biomasa; Gasificación.; Água; Supercrítico; Hidrogênio; Biomassa; Gaseificação.; Water; Supercritical; Hydrogen; Biomass; Gasification.

In recent decades, the interest in using biomass for energy production has grown considerably. Besides recycling waste from agriculture and food, for example, bagasse from sugar cane, biomass energy avoids the increase of carbon dioxide in the atmosphere. The residual biomass can be used in various ways to generate energy. One and perhaps the most effective is the production of hydrogen. The study of hydrogen production from alternative sources has grown in recent years due to the need to use renewable sources and the technological development of fuel cells. Among several alternatives, gasification in supercritical water cannot be specific for a particular residue (or agricultural effluents in various processes). During gasification in supercritical water, or at temperatures and pressures greater than or equal to 374 °C and 22.1 MPa, respectively, are produced in much hydrogen (H2) and carbon dioxide (CO2). However, too high pressures and temperatures, the materials for construction and maintenance of the production plant deserve special attention, and high operating cost becomes the greatest obstacle to developing this technology. However, in addition to excellent efficiency, hydrogen in a fuel cell generates only water as a by-product, therefore replacing processes using fossil fuels with alternative processes that use a convenient and timely manner. The hydrogen generation technology in supercritical water meets this yearning, and new studies are being conducted to make it more viable.