Ethanol Dehydration over WO₃/TiO₂ Catalysts Using Titania Derived from Sol-Gel and Solvothermal Methods

Table 6

Ethanol conversion, product selectivity, and product yield as a function of reaction temperature (the reaction condition: T = 200–400°C, WHSV = 22.9 g_ethanol·g_cat⁻¹·h⁻¹, and catalyst weight = 0.05 (g)).

Catalyst	Temp (°C)	Ethanol conversion (%)	Product selectivity (%)			Product yield (%)
			Ethylene	DEE	Acetaldehyde	Ethylene	DEE	Acetaldehyde
TIO2-SG	200	4.5	0.0	0.0	100.0	0.0	0.0	4.5
	250	8.6	1.8	0.0	98.2	0.2	0.0	8.5
	300	13.2	4.0	2.6	93.4	0.5	0.3	12.3
	350	32.3	11.4	1.6	87.0	3.7	0.5	28.1
	400	33.9	17.7	0.9	81.4	6.0	0.3	27.6
TIO2-SV	200	21.1	0.0	0.0	100.0	0.0	0.0	21.1
	250	23.2	0.0	0.0	100.0	0.0	0.0	23.2
	300	35.7	2.5	2.1	95.3	0.9	0.8	34.1
	350	54.3	9.7	2.4	87.8	5.3	1.3	47.7
	400	56.3	25.5	3.4	71.1	14.4	1.9	40.0
WO3/TiO2-SG	200	12.4	4.7	37.4	57.9	0.6	4.6	7.2
	250	16.4	17.1	40.9	42.0	2.8	6.7	6.9
	300	25.0	39.5	10.4	50.1	9.9	2.6	12.5
	350	33.4	54.5	3.3	42.3	18.2	1.1	14.1
	400	45.4	64.6	1.3	34.1	29.3	0.6	15.5
WO3/TiO2-SV	200	33.2	5.2	42.6	52.2	1.7	14.2	17.3
	250	37.7	22.4	67.7	10.0	8.4	25.5	3.8
	300	51.8	52.6	42.4	5.0	27.3	22.0	2.6
	350	71.7	76.4	17.8	5.8	54.8	12.8	4.1
	400	87.6	88.2	3.5	8.3	77.2	3.1	7.3