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Gasificación of rice hulls : theory and praxis.




History of gas producer engine systems. History. Literature review. Chemistry of gasification of rice hulls. Formation reactions. Reaction zones. Model I. Example. Computer program. Analysis of the results. Influence of the moisture content. Higher heating values of the computed gas compositions. Summary for model I. Modell II. Species concentration equation. The energy equation. Flame temperatures of producer gas. Computer program. Comparison of theoretical results and experimental data. List of symbols. PHYSICAL PROPERTIES OF RICE HULLS. Densities. Introduction. Phase fractions. Surface area of loose rice hulls and rice hull pellets. Determination of A for rice hulls. Apparent surface a of pellets. Weight of a single rice hulls. Accuracy of the results. Caking and slagging behavior of rice hulls. Slagging of rice hull ash. Cause of slagging. Caking of rice hulls and pellets. Summary. Pressure drop in a rice hull bed and superficial velocities. Experimental set up and results. Theoretical treatment of the pressure drop in a rice hull fuel bed. Size distribution of rice hulls and rice hull char. List of symbols. References. PHYSICAL APPEARANCE OF RICE HULLS UNDER THERMAL DECOMPOSITION. Micrographs of rice hulls before thermal decomposition. Micrographs of rice hulls after thermal decomposition. Size reduction of pelletized rice hulls. Low temperature energy conversion of rice hulls. Products of pyrolysis. Mechanism of pyrolysis. Pyrolysis experiments in a pure nitrogen atmosphere. Heat-up period for a single rice hull. TAR CRACKING IN A RICE HULL AND RICE HULL PELLET FUEL BED. DESIGN CONSIDERATIONS FOR A RICE HULL GAS PRODUCER.

Presenta diagrs., ilus. y gráfs.

Ministerio de Ambiente y Energía. Secretaría de Planificación del Sub-Sector Energía - Centro de Información de Energía y Ambiente, CIENA

Grettel Ruiz Matarrita

Calle 25, Avenidas 8 y 10. San José, Costa Rica

(506)25476900 - 25476239

De lunes a viernes de 8 a.m. a 12m.

Address: Av. Mariscal Antonio José de Sucre N58-63 y Fernández Salvador Edif. Olade - San Carlos, Quito - Ecuador.

Web: www.olade.org

Phone: (593 2) 259 8122 / 2598 280

Correo: realc@olade.org

Desarrollado por: Aikyu-Systems