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BET theory

About: BET theory is a research topic. Over the lifetime, 9046 publications have been published within this topic receiving 286142 citations.


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Journal ArticleDOI
TL;DR: In this paper, the role of the catalyst in catalytic ozonation was discussed and it was concluded that the main mechanism should be developed through surface reactions involving both pollutants and ozone adsorption.
Abstract: Catalytic ozonation of a simulated phenolic wastewater composed by six acids: syringic, vanillic, 3,4,5-trimethoxybenzoic, veratric, protocatechuic and 4-hydroxybenzoic normally present in olive mill wastewaters was studied over a Mn–Ce–O laboratorial catalyst under different operating conditions. A high improvement in total organic carbon (TOC) degradation was observed even when low catalyst concentrations were used when compared with single ozonation. The influence of the medium pH in the performance of both single and catalytic ozonation was assessed in a wide range of pH values. An inhibitory effect in TOC removal was observed in the catalytic process performance at high pH values. The use of radical scavengers proved that this catalytic system does not follow a free radical pathway. No differences were observed between fresh and used catalyst structure and morphology by SEM and XRD. Nevertheless, a decrease on BET surface area was detected. Leaching of Mn as well as carbon adsorption due to organic intermediates deposition at the catalyst surface was analyzed for the recovered catalyst at the end of the experiments. The role of the catalyst in the catalytic ozonation pathway was discussed being concluded that the main mechanism should be developed through surface reactions involving both pollutants and ozone adsorption. A series of feed-batch trials was performed to test Mn–Ce–O activity along the time. A slight decrease on TOC removal was observed from the first to the second use, remaining the catalyst performance constant after the third run.

141 citations

Journal ArticleDOI
TL;DR: In this paper, a detailed investigation on how charge compensating anions and synthesis pH affect the structural properties and CO2 adsorption capacity of Mg-Al hydrotalcites (HTs).

141 citations

Journal ArticleDOI
TL;DR: In this article, the authors reported the preparation of activated carbon from durian shell (DSAC) by microwave assisted NaOH activation, and the results revealed the potential of durian shells as a viable biomass for preparation of carbon.

141 citations

Journal ArticleDOI
TL;DR: Comparison of relative photonic efficiencies demonstrated that supported TiO2 exhibited higher activity than some of the commercial photocatalysts, due to synergistic effects of improved adsorption of 2,4-D and efficient delocalisation of photogenerated electrons by zeolite support.

141 citations

Journal ArticleDOI
01 Jan 2000-Carbon
TL;DR: In this article, the feasibility of preparing activated carbons from oil palm stones by one-step CO2 activation was studied, and the results showed that the particle size of the starting material and heating rate appeared to have no significant effects on the BET surface areas of the activated carbon, but CO2 flow-rate had a significant influence increasing the heating rate.

141 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023166
2022356
2021525
2020551
2019533
2018531