TGA/FTIR study of the MCM-41-catalytic pyrolysis of tobacco and tobacco–glycerol mixtures

Abstract

In this work, the catalytic effect of MCM-41 on the qualitative composition of the gases evolved in the pyrolysis of glycerol, tobacco and tobacco-glycerol mixtures has been studied by TGA/FTIR. The results obtained reflect that the amount of volatile products obtained from tobacco or from tobacco containing mixtures is noticeably decreased if the catalyst is used as a tobacco additive. The addition of the catalyst also produces noticeable changes in the composition of the gases obtained at each temperature. Such changes are more significant in the case of the pyrolysis of the tobacco-glycerol-mixture than in the pyrolysis of tobacco. The evolution patterns for different types of compounds reveal that the catalyst contributes to a noticeable decrease of the yields of methane, CO, CO 2 and carbonylic compounds, which could be interesting from the point of view of the use of MCM-41 as a tobacco additive in order to reduce tobacco smoke toxicity.

TGA‐FTIR study of the pyrolysis of sodium citrate and its effect on the pyrolysis of tobacco and tobacco/SBA‐15 mixtures under N2 and air atmospheres

“…SBA‐15 catalyst (S) was synthesized according to a previously described procedure . The textural characteristics of SBA‐15 were analyzed by the corresponding N 2 adsorption isotherms at 77 K, measured in an automatic Autosorb‐6 analyzer supplied by Quantachrome (Boynton Beach, FL, USA).…”

“…The use of zeolites and other aluminosilicates in the filter or directly mixed with tobacco in order to reduce nitrosamines and polycyclic aromatics in the tobacco mainstream smoke has been described by several authors, who investigated the role of materials such as NaA, NaY, KA and NaZSM‐5, Cu‐ZSM‐5, SBA‐15, MCM‐48 and cerium‐containing MCM‐48, among others. The role of some of these materials in the pyrolysis and oxidation of tobacco as well as in different systems involving tobacco and different cigarette additives has been reported elsewhere …”

A copper(II) complex with pyridine-2,6-dicarboxylic acid: Synthesis, characterization, thermal decomposition, bioactivity and interactions with herring sperm DNA

“…FTIR was employed to detect the evolved gases of the complex which come from the thermal decomposition process at different temperatures, and the test result are shown in the corresponding Gram-Schmidt curve [36] (GS curve, as shown in the supplementary material). The TG-DTG curves of the complex are shown in Fig.…”

TGA–FTIR study of the thermal and SBA-15-catalytic pyrolysis of potassium citrate under nitrogen and air atmospheres

“…According to the bibliography [17][18][19][20][21], the mechanism of biomass pyrolysis is complicated and involves a large number of parallel and series reactions; nevertheless, a realistic approach can be made considering three independent parallel reactions, each corresponding to the decomposition of the constituent components hemicellulose, cellulose and lignin. Nevertheless, the pyrolytic reactions of potassium citrate have not been extensively studied.…”

“…Recently, the use of different porous structured solids has been studied to reduce the evolution of different compounds from tobacco smoke in order to reduce its toxicity [29,30], and the effect of these materials on the pyrolysis reactions of different tobacco additives has been studied using TG and TG-FTIR techniques [20,21]. The objective of the present paper is to study the thermal decomposition of potassium citrate by TG-FTIR and the effect of SBA-15 in such reactions both in N 2 and in air atmospheres, which to our knowledge has not been reported previously.…”