Type of I.P :
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Patent Title : A Catalyst Applicable For Gasification Of Biomass And A Method Using The Same
Patent Registration No : To be provided
R&D The invention is at the lab stage or proof concept stage
Pre-Commercial The invention is currently in the process of field testing
Ready For Market Invention is ready to be licensed out or sold
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Product Year :
A method of producing hydrogen gas by decomposing lignocellulosic materials comprises the steps of providing a mixture of the cellulosic materials and a catalyst in a ratio of 0.2-1 to 0.2-1 by weight; heating the mixture at a temperature increasing rate of 5 to 200C min-1 to a temperature of 600 to 12000C to decompose the mixture to produce the hydrogen gas in the presence of an inert gas having partial oxygen of 0.5 to 10%, wherein the catalyst is calcined CaO-NiO solid doped with Ba-based derivative and/or Nd-based derivative.
- environmental friendly
- Cellulosic materials
Biomass gasification, global sustainability
Rh, Pt, and Pt-Rh catalysts on modified commercial zirconia support (m-ZrO2) were screened for the clean-up of gasification gas from tar, methane, and ammonia both in the absence and presence of H2S while varying the Rh metal content from 0.5 to 5 w-%. Our goal was to optimize the composition of the Rh/m-ZrO2 catalyst in view of the production of ultra clean gas applicable for liquid biofuels synthesis. In the presence of 100ppm sulfur, increasing Rh concentration from 0.5 to 5 w-% did not greatly improve the activity of the catalyst. The bimetallic Pt/Rh/m-ZrO2 catalyst was also less active than the 0.5 w-% Rh/m-ZrO2 catalyst. Furthermore, the Rh/m-ZrO2 catalyst regained its performance at the set point of 800°C when the sulfur feed was turned off even after exposures to 500–1000ppm sulfur. Our data allow us to suggest that in the presence of sulfur, the active sites responsible for the reforming reactions are poisoned, but less impact occurs on sites responsible for oxidation reactions. Furthermore, the screening experiments allow to suggest that the Rh/m-ZrO2 catalyst could be applicable to hot gas cleaning in the presence of sulfur (>50ppm) at above 800°C using a moderate gas hourly space velocity of approximately 3400 1/h. Since biomass gasification gas generally contains sulfur, the 0.5 w-% Rh/m-ZrO2 catalyst could be a promising option for gasification gas clean-up applications at temperatures above 800°C where it reduces tar to very low levels.
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