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Supplementary information
Impact of Precursor Sequence of Addition for One-pot Synthesis of Cr-MCM-41 catalyst nanoparticles to enhance ethane Oxidative
Dehydrogenation with Carbon dioxide
Abdulrhman S. Al-Awadi1, Ahmed Mohamed El-Toni2,3,* Mansour Alhoshan1, Aslam Khan2,
Joselito P. Labis2, Ahmed Al-Fatesh1, Ahmed E. Abasaeed1, Saeed M. Al-Zahrani1
1Chemical Engineering Department, King Saud University, Riyadh 11451, Saudi Arabia
2 King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia
3Central Metallurgical Research and Development Institute, CMRDI, Helwan 11421, Cairo,
Egypt
* Corresponding author: aamohammad@ksu.edu.sa
Fig. S1: Schematic diagram of the catalytic experimental setup
Table S1: pH variation through one-pot Synthesis steps of 8wt%Cr/MCM-41 using different precursor sequence of addition
Synthesis SteppH Value
MCM-41
MCM41-TEOS then Cr
MCM41-Cr then TEOS
Step I
H2O+NH4OH+HTMAL solution
10.95 10.94 10.95
Step II
TESO or Cr additionTEOS addition Cr addition
One hour later 9.64 9.60 9.37
Step III
Cr or TEOS additionCr addition TEOS addition
One more hour later - 8.85 8.87
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