Flow through milled bagasse is neither practical from a fluid mechanical perspective because the pressure drop per unit length is too high nor a logistical perspective because an additional size reduction processing step is undesirable. The pressure drop across a reactor of bagasse as received from the sugar mill diffusers is of greater practical interest. At room temperature, the pressure drop across the reactor packed with 100 kg/m3 of bagasse as received was below 6kPa/m. At 120 kg/m3, the pressuer drop was 34 kPa/m and it increased exponentially to 192 kPa/m at 200 kg/m3. No flow was possible at 400 kg/m3.