This monograph was prepared for the Agency for International Development, Washington D. C. 20523. The authors gratefully acknowledge the assistance ofthe following Research Assistants in the Department of Agricultural Engineering: G. Lamorey, E. A. Osman and K. Sachs. J. L. Bumgarner, Draftsman for the Department, did most ofthe ink drawings. The writing of the monograph provided an unique opportunity to collect and study a significant part of the English and some German literature on the subject starting about the year 1900. It may be concluded that, despite renewed worldwide efforts in this...

Italian Balestra Type Updraft Rice Hull Gas Producer (1910 - 1944) 216 Chinese Rice Hull Gas Producer 221 Design Considerations for Ash Removal Systems 224 Ash Removal Designs 226 Summary 237 Design Considerations for the Gas Exit 237 Air Injection Designs 243 Design of a Small (2 - 20 hp) Rice Hull Gas Producer 246 Open Core Gas Producer 256 .Mode of Operation 258 Gas Cleaning Train 278 Sieve Plate Scrubber and Dry Packed Bed Filter 280 Experimental Procedures and Results 284 Summary 295 List of Symbols 296 References 298 VIII LIST OF FIGURES FIGURE PAGE 1-1 Energy fractions in gaseous...