Environmentally friendly catalytic combustion of gaseous fuel to heat greenhouses

Abstract

Data on the study of thermally stable manganese oxide catalysts for deep oxidation of lean CH 4 and propane-butane mixtures in air into CO 2 are presented in the paper. New approaches to the synthesis of polyoxide catalysts based on Mn, modified with rare earth elements (La, Ce) and alkaline earth elements (Ba, Sr) when its supporting from nitrate solutions onto the alumina granules stabilized with 2 % Ce were used in the preparation of catalysts. Polyoxide thermally stable (up to 1473 K) highperformance Mn-containing catalyst for deep oxidation of CH 4 and propane-butane in gas-air mixture was developed. Prototype of the catalytic heat generator for environmentally friendly burning of methane and propane-butane mixture was created. Experienced tests of the catalytic heat generator for heating of greenhouses were performed and carbon dioxide fertilizing of plants by combustion products of propane-butane mixture was carried out. REERare earth elements AEE Alkaline earth elements a CH4 Degree of CH 4 conversion XRD X-ray diffraction TEM Transmission electron microscopy BET Brunauer-Emmett-Teller method ESDR Electronic spectroscopy of diffuse reflections TPD Temperature-programmed desorption TPR Temperature-programmed reduction TPO Temperature-programmed oxidation S Surface area

Macroporous ceramics for the sustainable development goals (SDGs): Review

“…For catalyst applications, the macroporous support has attracted great attention, especially in greenhouse plant cultivation in cold area, in which the catalytic combustion can play roles as heating greenhouses and fertilizing plants by CO 2 produced by the deep oxidation. Tungatarova et al 64 developed thermally stable polyoxide containing Mn catalyst on macroporous alumina support that achieved 97%-100% oxidation of hydrocarbons under lowered reaction temperature of 100 K and reduced catalyst consumption approximately six times, noting that their method could increase the productivity of crop yields up to 5%-7%. For the irrigation, macroporous emitter has been considered, in order to reduce the risk of deep percolation and improve the water use efficiency in sandy soil.…”