کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6452898 | 1418396 | 2017 | 6 صفحه PDF | دانلود رایگان |
- The electron equivalent balance closure was within â12 to +10% for all experiments.
- The Gibb's free energies (ÎG°) were fluctuated from â2.2 to â5.9 (kJ/mol).
- The Gompertz model depicts that Hmax 1551Â mL was occurred at H2SO4 treatments.
- The longest lag phase is related to HCl pretreatment.
This study presents results pertaining to bioH2 production carried out in batch experiments under different inorganic acid pretreatments of sludge. The sludge was collected from an anaerobic digester and was subjected to different acid (H2SO4, H3PO4, HNO3, and HCl) pretreatments at pH 3 for 24 h. The results showed that electron equivalent balance closure was within â12 to +10% for all experiments; the portion of electrons as bioH2 fluctuated from 16% to 25%. H2SO4 pretreatments significantly increased H2 yields to 3.3 mol H2/mol glucose followed by HNO3, HCl, and H3PO4 pretreatments which averaged 2.5 ± 0.5. Enthalpy (ÎH°) and Gibb's free energies (ÎG°) fluctuated from 120.5 to 192.7 (kJ/mol) and from â2.2 to â5.9 (kJ/mol). The modified Gompertz was assessed and determined that the maximum bioH2 production potential, 1551 mL and maximum rate of bioH2 production, 303 mL/h occurred using the H2SO4 pretreatment.
140
Journal: Process Biochemistry - Volume 61, October 2017, Pages 24-29