Cellulose Conversion to 5 Hydroxymethyl Furfural (5-HMF) Using Al-Incorporated SBA-15 as Highly Efficient Catalyst

Table 4

NH₃ amount of weak, medium, and strong acid sites of SBA-15 and xAl/SBA-15.

Samples	mol NH3/g cat
	<200°C	250–300°C	500–550°C	Total
SBA-15	0.23	—	—	0.23
1Al/SBA-15	0.23	0.22	0.04	0.49
2Al/SBA-15	0.43	0.19	0.56	1.18
3Al/SBA-15	0.14	0.17	0.12	0.43