In 2006, installation for conversion of different Ukrainian solid fuels into synthesis gas with high hydrogen content is created. Dry synthesis gas with volume content of hydrogen more than 50 % is produced, influence of different factors on the content of produced dry and wet synthesis gas, rate of solid fuel reaction and productivity of installation are studied at the installation. Kinetic rate constants of reaction of Ukrainian high-ash anthracite culm and steam are obtained.
In 2007, kinetic rate constants of reaction of Ukrainian low-quality bituminous solid fuel and steam are obtained. New reactors for absorption of sulfur compounds and CO for installation for obtaining hydrogen from low-quality solid fuel are created. New techniques for analysis of experimental data about processes of solid fuel conversion, cleaning of synthesis gas from sulfur compounds, and CO absorption are developed.
In 2008, the new modifications of installation for research of coal volatile steam conversion (SC), water gas shift reaction, carbon-dioxide gas absorption in a steam gasifier and in a reactor of low-temperature СО2 absorption, hydrogen production from bituminous coal coke are created. The review of last achievements in the field of hydrogen production from solid fuel is made. There are carried out the researches: steam-carbon-dioxide gasification of РЕТ coke; steam conversion of volatile of high-ash bituminous coal from the Lvov-Volyn deposit with production of technical hydrogen; steam conversion of coke of this coal into hydrogen with the use of lime, medium- and low-temperature catalysts of СО conversion and monoethanolamine; catalytic steam conversion of high-ash anthracite culm from the Donetsk deposit.
In 2009 the processes of thermolysis and SC of Zhitomirsky brown coal (BC) volatile are studied. Experiment shows that the use of volatile SC three times reduced the time of BC carbonization in comparison with thermolysis. BC coke was used to obtain hydrogen by two circuits: 1) steam gasifier with medium-temperature catalyst of CO absorption within the layer of lime, 2) steam gasifier (with lime), water shift reactor (with catalyst of CO conversion) and CO2 absorption reactor (with solution of monoethanolamine). Synthesis gas containing over 80 vol. % of hydrogen (technical hydrogen) was obtained at the gasifier outlet by the circuit (1). 59.3% of carbon reacted with steam was removed by absorber in the gasifier. Hydrogen with purity of 94.7-96.2 % was obtained at the installation outlet by the circuit (2). 89.7% of carbon, reacted with steam in the gasifier, was removed in the installation.
In 2010, the peat of Rivne region deposit and coking coal of Donetsk coal basin were used for steam conversion. The dynamics of peat devolatilization was studied and peat coal was obtained. An increase in hydrogen content in dry gas up to 72.04 vol. % when using peat and to 83.74 vol. % when using coking coal was reached due to steam conversion of volatiles on a lime bed. 49.58% of carbon, reacted with steam water, was fixed during the steam gasification of peat coke in the absorber bed. Coke of coking coal was used to produce hydrogen by the circuit: the steam gasifier (with lime), water shift reactor (with catalysts of CO conversion), and CO2 absorption reactor (with a solution of monoethanolamin). Hydrogen with purity of 93,2-94,7% was obtained at the installation outlet. A new process of combustion and gasification of solid fuels in circulating fluidized bed under pressure for steam-gas plant on fuel cells is developed. Forecast assumptions about the development of the object of research - modernization of the Fuel Cell Test Installation, creation of a new pilot plant for hydrogen production using fuel cells.
Keywords: Hydrogen, steam conversion, coal, PET, peat