For the range of conditions tested, optimizing the ammonia loading, moisture content and residence time are more important for maximizing sugar yields from corn stover.
None of the other AFEX parameters show this relationship with either harvest date or corn stover fraction, which indicates that the same pretreatment conditions (moisture, temperature and residence time) can be used to maximize glucose release, regardless of the fractional composition of the corn stover or the harvest date.
For longer uninterrupted plant operation, residence time of these components is to be maximized within the plant and that necessitates a thorough structural integrity analysis of such tubes.
It is found that heat exchanger effectiveness is maximized for higher entry temperatures and for optimum values of the geometry and residence time balancing enhanced heat transfer between the particle beds and increased losses to the environment.
Therefore, the AFEX conditions used for further experiments on dried CS (0X-CS, 1X-CS or 10X-CS) were 90°C, 1 1 ammonia loading, 60% moisture and 5 min residence time to maximize glucan and xylan conversions.
The short residence time also suppresses undesirable secondary reactions such as hydrogen-transfer reactions, which consume olefins to maximize propylene production.
The implemented recycle reactor model is used to optimize the reaction conditions with the aim of maximizing propene yield and minimizing ethene yield from a 1-pentene feed by varying reaction temperature as well as residence time.
The liquid ammonia pretreatment (LAT) conditions were optimized to maximize sugar release of giant reed using a response surface methodology (RS M on Box-Behnken design by varying temperature, water loading, ammonia loading and residence time.
15.2 Residence Time Models.
Residence time distribution (R.T.D).
15 Residence Time Distributions. 15.1 Residence Time Theory.
