404 results about "Hydrogen yield" patented technology

The invention discloses a method for producing hydrogen from biogas biomass. The method comprises the following four major procedures: pre-purification, concentration, hydrogen production and hydrogenextraction. After biogas has undergone pre-purification and desulfurization, the biogas is pressurized and enters the pressure-swing adsorption and concentration unit, and methane is concentrated; after pressurization and preheating, further desulfurization is performed in virtue of a fine desulfurization tower; intermediate gas obtained after fine desulfurization and process steam are further preheated and then enter a reformer, and methane reacts with water vapor to produce CO, CO2, and H2; waste heat produced by reforming can by-produce steam which is output; CO is converted into CO2 through multiple-stage heat recovery and medium-temperature conversion so as to obtain more hydrogen and increase hydrogen yield; converted gas enters the pressure-swing adsorption hydrogen extraction procedure after multiple-stage heat recovery and cooling so as to obtain pure hydrogen and produce by-products such as steam and sulfur. In concentration of methane in the concentration procedure, the once-through yield of methane can reach 95% or more; remaining effective components provide equipment with heat energy through the recycling of tail gas; so the total utilization rate of methane is almost 100%, and full recovery of methane is realized.

The invention provides an integral catalyst for biological oil steam reforming hydrogen production, which has high reaction activity, strong carbon deposition resistance and good stability, and further provides a preparation method and application thereof. The catalyst consists of a carrier and an active component and comprises the following components by weight percentage: 5-20wt percent of active component nickel oxide, 0-5wt percent of alkali metal auxiliary agent, 0-5wt percent of metal auxiliary agent and the balance of integral ceramic carrier with the surface coated with 1-5 percent of Gamma-Al2O3. The integral catalyst is applied to biological oil reforming hydrogen production and has the characteristics of simple preparation method, easy control of conditions and good catalyst repeatability. Compared with the common granular type catalyst, the integral catalyst has the characteristics of more even heating, less mass transfer resistance, has higher activity to reaction, strong carbon deposition resistance and good stability, and greatly improves the biological oil conversion rate, hydrogen yield and catalyst service life.