Simultaneous Coproduction of Hydrogen and Ethanol in Anaerobic Packed-Bed Reactors

Table 3

SMP distribution in studies using APBRs for hydrogen production.

Reference	Substrate; (support material)	HRT; (h)	EtOH/SMP; (%)	HAc/SMP; (%)	HPr/SMP; (%)	HBu/SMP; (%)	MetOH/SMP; (%)	HVl/SMP; (%)	HCpr/SMP; (%)	TVFA; (mmol L^−1)	SMP; (mmol L^−1)	HAc/HBu*	HAc/EtOH*
Chang et al. [1]**	Sucrose (expanded clay)	5	46.3	27.2	17.4	9.1	—	—	—	29.9	55.8	2.9	0.6
		2	42.7	24.9	24.6	7.8	—	—	—	44.5	77.7	3.2	0.6
		1	25.3	31.1	33.9	9.7	—	—	—	50.7	67.9	3.2	1.2
		0.5	19.5	29.4	39.3	11.7	—	—	—	64.2	79.9	2.5	1.5
Lee et al. [2]**	Sucrose (activated carbon)	4	1.6	31.3	36.8	29.7	—	0.6	—	94.9	96.5	1.1	19.3
		2	21.0	20.8	16.6	37.8	—	3.9	—	89.2	112.8	0.6	1.0
		1	9.6	19.2	23.4	41.8	—	6.0	—	147.4	163.0	0.5	2.0
		0.5	10.3	20.6	24.7	41.2	—	3.2	—	136.2	151.8	0.5	2.0
Zhang et al. [3]	Glucose; (glass beads)	1.3***	—	70.6	—	29.4	—	—	—	1.7	1.7	2.4	—
Wu et al. [4]	Fructose; (POE)	4	52.8	25.1	10.1	12.1	—	—	—	355.7	616.3	2.1	0.5
Wu et al. [4]	Sucrose; (POE)	4	62.0	29.9	1.9	6.2	—	—	—	605.7	1302.2	4.8	0.5
Wu et al. [4]	Glucose; (POE)	4	69.2	22.3	1.3	7.1	—	—	—	418.5	1064.4	3.1	0.3
Leite et al. [5]	Glucose; (expanded clay)	0.5	—	57.9	3.0	34.0	—	—	5.1	12.9	12.9	1.7	—

HVl: valeric acid. HCpr: caproic acid.
*Molar ratio, **based on article data, and ***HRT = reactor volume/influent flow rate.