Reflowed Aqua Ammonia Explosion Pretreatment for Corn Stover
Based on ammonia recycled percolation (ARP) and combined with the advantage of ammonia fiber explosion (AFEX), a set of reflowed aqua ammonia explosion pretreatment (RAAEP) equipment was developed. According to the previous orthogonal experiment experimental results, the optimal pretreatment conditions were at 90°C, 9 min retention time, water to dry corn stover loading of 0.8:l(w/w), and aqua ammonia flow rate is 1.5L/min. The cellulose content of the pretreated corn stover was 50.46 ％ and the glucan and xylan enzymatic digestibility was 86.45 ％ and 95.77％ respectively. The reflowed aqua ammonia not only caused fiber swelling and an efficient delignification (up to 62.5％) of biomass, but also altered the cellulose crystalline structure. The SEM picture and FTIR spectra confirmed swelling and significant delignification effects of the RAAEP process. The X-ray crystallography data indicated that the rigid structure of corn stover was disrupted with more crystallization fiber being exposed after the pretreatment process, but the crystallinity increased due to the removal of amorphous materials (lignin and hemicelluloses).
Reflowed aqua ammonia explosion Corn stover Pretreatment Enzymatic hydrolysis
Bing Li Chao Zhang Feng Pang Yong Kang
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072
国际会议
大连
英文
1184-1189
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）