Mechanical impregnation of Pd-Sn/alumina and Cu-Mn/graphite on charcoal to minimise carbon monoxide emissions

Abstract

This study investigated how to minimize carbon monoxide (CO) emissions from charcoal by impregnating with Pd-Sn/alumina and Cu-Mn/graphite. Samples were heated isothermally with continuous monitoring of residual CO using electrochemical and infra-red sensors. With 0.2wt% Pd-Sn/alumina, 26.9% and 44.4% were recorded as lowest and highest residual CO. On the other hand, when 2wt% Cu-Mn/graphite was used, 15.6%, and 25.3% were observed as lowest and highest residual CO. The activity of the catalysts decreased with temperature and increased with catalyst loading. This method could be used on briquettes, wood boiler chips and other solid carbonaceous materials to minimise CO emissions.

Catalytic Effects on the Nonisothermal Oxidation of Solid Fuels by Oxygen: An Experimental Study

“…The difference in reactivities was quantified at different conversion levels of the solid fuels in terms of activation energies and pre-exponential factors. This study expands on our previous work in which catalyst impregnation was done on charcoal but the experiments were done isothermally in a tube furnace, yet real-life combustion occurs nonisothermally. Also, CO emissions were quantified and the temperature range was 300–600 °C, and finally, this study uses laboratory manufactured charcoal briquettes similar to products on the market.…”

“…However, these values were obtained at isothermal temperatures ranging between 300 and 600 °C in a tube furnace and at relatively high airflows. In another study, 31 mechanically impregnated catalysts were used to minimize CO emissions from charcoal. CO emissions were reduced, but the catalyst lost activity with an increase in temperature.…”

Toxic emissions from smouldering combustion of woody biomass and derived char with a case study of CO build-up in an ISO container

“…The calorific values were determined using a method described elsewhere [47]. For determination of carbon monoxide (CO) emissions, triplicates of 200 mg samples were pyrolysed under air at temperatures between 300 -450 o C using a method described in our previous work [48]. The duration of the experiments varied between 5 -7 minutes.…”

“…For determination of carbon monoxide (CO) emissions, triplicates of 200 mg samples were heated under air at temperatures between 350 -600 o C using a method previously described in our previous work [48].…”