TY - JOUR
T1 - Cellulose hydrolysis over silica modified with chlorosulphonic acid in one pot synthesis
AU - Hello, Kasim Mohammed
AU - Hasan, Hathama Rzooki
AU - Sauodi, Muna Hasoon
AU - Morgen, Per
PY - 2014/4/5
Y1 - 2014/4/5
N2 - Titration of chlorosulphonic acid against sodium silicate was carried out via a simple one pot synthesis at room temperature to form an acid catalyst denoted as RHSO3H. The BET measurements of the catalyst showed the surface area to be 80 m2 g-1. The FT-IR clearly showed the presence of -SO2- absorption band at the expected range. The XPS showed the presence of O, Si, and S. The presence of S 2p on the XPS spectra indicated that the sulphonic acid groups (-SO3H) are included into the catalyst structure. The RHSO3H was efficient for the hydrolysis of cellulose, with maximum glucose yields over 99% at 120 C with 100% selectivity. As the solubility of cellulose is very important factor to make the hydrolysis much more easily. It was observed that the mixture of DMF/LiCl or cyclohexanol/LiCl has high ability to dissolve cellulose. The catalyst was simple in its preparation, stable during the cellulose hydrolysis in addition to repeatedly without a significant loss of its catalytic activity.
AB - Titration of chlorosulphonic acid against sodium silicate was carried out via a simple one pot synthesis at room temperature to form an acid catalyst denoted as RHSO3H. The BET measurements of the catalyst showed the surface area to be 80 m2 g-1. The FT-IR clearly showed the presence of -SO2- absorption band at the expected range. The XPS showed the presence of O, Si, and S. The presence of S 2p on the XPS spectra indicated that the sulphonic acid groups (-SO3H) are included into the catalyst structure. The RHSO3H was efficient for the hydrolysis of cellulose, with maximum glucose yields over 99% at 120 C with 100% selectivity. As the solubility of cellulose is very important factor to make the hydrolysis much more easily. It was observed that the mixture of DMF/LiCl or cyclohexanol/LiCl has high ability to dissolve cellulose. The catalyst was simple in its preparation, stable during the cellulose hydrolysis in addition to repeatedly without a significant loss of its catalytic activity.
KW - Cellulose
KW - Chlorosulphonic acid
KW - Glucose
KW - Rice husk ash
KW - Surface modification
U2 - 10.1016/j.apcata.2014.01.035
DO - 10.1016/j.apcata.2014.01.035
M3 - Journal article
AN - SCOPUS:84893825119
VL - 475
SP - 226
EP - 234
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
SN - 0926-860X
ER -