Catalytic Evaluation of Hafnium Modified SiO2 for the Dehydration of Alcohols
Source abstract
Abstract
The influence of hafnium metal (Hf) and sulfate ions (SO42−) on the acidic properties of SiO2 mesopores synthesized by a non-hydrothermal method was studied using the following characterization techniques; TG-DTG, XRD, BET, SEM, TEM, EDS, FTIR, n-butylamine titration, FTIR-pyridine, and alcohol dehydration. The incorporation of 3.6% mol of Hf during the silicate synthesis step caused the characteristic structural arrangement of MCM-41 to collapse. However, an increase in the acid strength of the catalyst of up to 315 mV was observed, with Brönsted and Lewis-type acid sites being mostly present therein. Furthermore, the acidity of Hf- and (SO42−) -modified SiO2 in the dehydration of ethanol and methanol was evaluated, resulting in a selectivity towards ethylene and dimethyl ether, respectively. Acid solids have enormous potential to produce important compounds for the chemical industry using alternative routes other than petrochemical processes. They also represent a significant advance for biorefineries.
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Research context
OpenAlex topics: Mesoporous Materials and Catalysis · Zeolite Catalysis and Synthesis · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Interdisciplinary Center for Research and Studies on Environment and Development, Nacional Polytechnic Institute, Mexico City 07340, Mexico, Mexico
Research Group on Care Economy and Economic Autonomy, Nacional Polytechnic Institute, Mexico City 11350, Mexico, Mexico
National Technology of Mexico, Technological Institute of Ciudad Madero, Madero City 89440, Tamaulipas, Mexico
Center for Research in Advanced Materials, Chihuahua City 31109, Chihuahua, Mexico
Moscow State Institute of International Relations MGIMO, Moscow 119454, Russia
Joint Agency Cooperation Glocal, Mexico City 54130, Mexico, Mexico
Funding
National Council for the Humanities, Science and Technology · Higher Technological Institute of Naranjos
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