Catalyst for steam reforming of biomass tar and preparation method thereof

Abstract

The invention discloses a catalyst for steam reforming of biomass tar and a preparation method thereof. The catalyst for steam reforming of biomass tar is composed of an active component and a carrier, and the active component is Ni-NiO. The carrier is non-metal nitrogen-doped mesoporous cerium oxide (N-CeO 2 ). The preparation process is to dissolve urea, nickel nitrate, and cerium nitrate in deionized water in proportion, and then slowly air-dry at a certain temperature after stirring evenly. Biomass tar steam reforming catalyst is obtained by thermal treatment and activation in a mixture of hydrogen and nitrogen. This catalyst not only has a large specific surface area, uniform and adjustable pore size, but also shows high activity and stability in the catalytic aspect of biomass tar steam reforming. , and the preparation method is relatively simple and easy to expand.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for steam reforming of biomass tar and a preparation method thereof. Background technique [0002] In the 21st century, human beings will face severe challenges of energy issues. The extensive use of traditional fossil fuels not only brings serious environmental pollution and ecological damage, but also coal, oil, and natural gas are the main energy sources at this stage, and their resources are decreasing day by day. To meet the increasing demand for energy from social development, the development of clean and renewable energy has become an urgent need related to the sustainable development of the national economy, national security and social progress. Biomass energy is second only to coal, oil and natural gas in the fourth place in the world's total energy consumption. It has a large amount of resources and is widely distributed. Biomass energy is a renewable ener...

AI Technical Summary

Problems solved by technology

[0002] In the 21st century, human beings will face severe challenges of energy issues. The extensive use of traditional fossil fuels not only brings serious environmental pollution and ecological damage, but also coal, oil, and natural gas are the main energy sources at this stage, and their resources are decreasing day by day. To meet the increasing demand for energy from social development, the development of clean and renewable energy has become an urgent need related to the sustainable development of the national economy, national security and social progress

[0003] Biomass tends to produce more tar during gasification. The existence of tar mainly causes the following disadvantages: (1) Tar will form a viscous liquid at low temperature, which is corrosive when combined with some impurities such as water and fly ash. Long-term accumulation will block the pipeline, resulting in discontinuity of production, or even stop production; (2) The tar produced by biomass gasification accounts for 5-10% of the total energy of biomass, if it cannot be converted into useful combustible gas, it will be greatly reduce the conversion rate of biomass

[0005] In the traditional method for preparing nickel-based catalysts, noble metals, rare earth elements, etc. are often added as additives to maintain the high activity of nickel-based catalysts, resulting in expensive nickel-based catalysts; later found that adding carbon sources in the catalyst preparation method has It is helpful for the stability of catalyst pore formation and good particle dispersion performance, and can reduce costs at the same time. Therefore, activated carbon, sucrose, alkanes, etc. are also used as carbon sources in the preparation process of nickel-based catalysts, but the preparation process is complicated and the production The low efficiency still makes the manufacturing cost of the catalyst higher, and it is prone to carbon deposition, resulting in a decrease in activity