Key Laboratory of Industrial Biocatalysis, Ministry of Education, Tsinghua University, Beijing 100084, PR China; Institute of Applied Chemistry, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China.
Key Laboratory of Industrial Biocatalysis, Ministry of Education, Tsinghua University, Beijing 100084, PR China; Institute of Applied Chemistry, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China.
Bioresour Technol. 2022 Jan;344(Pt B):126189. doi: 10.1016/j.biortech.2021.126189. Epub 2021 Nov 5.
A coupled process of biomass pretreatment for increasing cellulose digestibility and direct conversion of biomass to electricity has been developed with ferric or ferricyanide ions as the anode electron carriers, and Fe(NO) activated by HNO as the cathode electron carriers. Pretreated substrates are subjected to enzymatic hydrolysis for release of fermentable sugars, while the pretreatment liquor is employed as anolyte for electricity generation in a liquid flow fuel cell (LFFC). Pretreatment of sugarcane bagasse with 2 M FeCl in anode reactor removes ∼ 100% hemicelluloses and obtains 76% enzymatic glucan conversion (EGC), while pretreatment with 0.1 M K[Fe(CN)] in 0.5 M KOH achieves 78% lignin removal, 95.8% EGC and 85.1% xylan conversion. From 1000 g bagasse, 171.3 g fermentable sugars is produced with co-generation of 101.4 W·h electricity based on FeCl pretreatment, while 519 g fermentable sugars and 28.9 W·h electricity are obtained based on K[Fe(CN)] pretreatment.
已开发出一种生物量预处理的偶联工艺，用于提高纤维素的可消化性，并将生物量直接转化为电能，该工艺使用铁或铁氰化物离子作为阳极电子载体，以 HNO 激活的 Fe(NO)作为阴极电子载体。预处理后的底物经过酶解以释放可发酵糖，而预处理液则用于在液流燃料电池（LFFC）中作为阳极电解液发电。在阳极反应器中用 2 M FeCl 预处理甘蔗渣可去除约 100%的半纤维素，并获得 76%的酶解葡聚糖转化率（EGC），而在 0.5 M KOH 中用 0.1 M K[Fe(CN)]预处理可去除 78%的木质素、95.8%的 EGC 和 85.1%的木聚糖转化率。从 1000 g 甘蔗渣中，基于 FeCl 预处理可共产生 171.3 g 可发酵糖和 101.4 W·h 电能，而基于 K[Fe(CN)]预处理可共产生 519 g 可发酵糖和 28.9 W·h 电能。
