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A packed bed Ammonia Fiber Expansion reactor system for pretreatment of agricultural residues at regional depots

2012; Taylor & Francis; Volume: 4; Issue: 1 Linguagem: Inglês

10.4155/bfs.12.71

1759-7277

Timothy J. Campbell, Farzaneh Teymouri, Bryan Bals, John Glassbrook, Chandra Nielson, Josh Videto,

Phosphorus and nutrient management

Background: Pretreatment of biomass at regional depots could simplify supply logistics for the emerging biofuels industry. Ammonia Fiber Expansion (AFEX™) could be an appropriate pretreatment method for use at depots, if the process can be simplified. Here we investigate pretreatment of corn stover and wheat straw using a simple packed bed AFEX system that exploits the high porosity of biomass to facilitate ammonia transport. Results & discussion: Steam stripping vertical packed beds allowed recovery of more than 90% residual ammonia as substantially dry vapor. AFEX-treated biomass gave enzyme hydrolysis yields equal to biomass treated in stirred batch reactors, and formed durable pellets. Conclusion: Packed bed AFEX shows significant promise as a biomass pretreatment for use at distributed depots.