Some physical properties of rice straw briqeuttes / [electronic resource].

Includes references.

The main objective ofthe present study is to develop the fundamentals of
a technology for energetic utilbation ofrice strml,. aimed at solving the
problem of harmful storing and burning of rice strmll in Egypt and
preventing the smoke clouds caused by this and handling via the right
way that is safe for both the environment and agriculture, producing a
cheap. easily storable. and environmentally sound biofuelfor rural areas
in Egypt. Chopped rice strmll was densifled into briquettes using a
laboratory model vertical hydraulic press at different formation
pressures of (/5, 32. 49 and 60 MPa), three temperature (room
temperature (3S'C). 75 and 100"C). three level ofmoisture content (6.53.
8.90 and /0.26% wb) and different holding time (10.20 and 30 min). The
results showed that the highest bulk density. compression ratio,
durability and water resistance were 1337 kglmJ
• 18.95% and 107 min,
respectively. at formation pressure of 60 MPa. temperature of /O(f'c,
moisture content of 6.53% and holding time of 30 min. While•. the
minimum resiliency obtained was 6.53%. The CO. CO2 and NOx
emissions values for rice straw briquettes decreased by 69, 54 and 37 %,
respectively, ofthe emissions values CO, CO2 and NOxfor chopped rice
straw. The combustion efficiency was 99% and 70% for rice straw
briquettes and chopped rice strmll, respectively, and the burning time
was about 74 and 15 min for rice straw briquettes and chopped rice
straw. respectively.

Summary in Arabic.