Method for improving yield of biomass and coal co-pyrolysis tar
A technology of tar yield and biomass, which is applied in the field of increasing the tar yield of co-pyrolysis of biomass and coal, can solve the problems affecting the reactivity of pyrolysis volatiles, etc., and achieve the goal of realizing tar yield and avoiding coking and cracking reactions Effect
Active Publication Date: 2020-06-23
DALIAN UNIV OF TECH
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Problems solved by technology
[0003] In view of the existing problems, the present invention utilizes the co-pyrolysis process of coal and biomass, the space between the feed particles will significantly affect the volatile reactivity of the two pyrolysis, and provides a method to improve the co-pyrolysis of coal and biomass. method of tar yield
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Embodiment 1
[0024] In the constant temperature zone of the quartz tube reactor, load a total of 2.5 g of raw materials in a sleeve-type arrangement (pine wood in the inner cylinder, Baiyinhua coal in the outer cylinder), wherein the mass ratio of pine wood and Baiyinhua coal is 1 / 1. The co-pyrolysis experiment was carried out under the conditions of 500 °C, a heating rate of 10 °C / s and a nitrogen purge of 300 mL / min, and the reaction time was 20 min. The gaseous products after the reaction were condensed by a -20°C cold trap to collect the liquid products, and the water products were separated to obtain oil products, and the yields of each product were calculated respectively. figure 2 It is the comparison of the tar yield, water yield, semi-coke yield and gas yield of embodiment and comparative examples 1-4. It can be found that the tar yield of the embodiment increases by 8.70wt.% compared to the tar yield in Comparative Example 2, reaching 38.24wt.%, while the gas yield decreases b...
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The invention provides a method for improving yield of biomass and coal co-pyrolysis tar, which belongs to the technical field of energy. According to the method, the characteristic that the reactivity of pyrolytic volatile components of fed particles can be obviously influenced by reasonably utilizing the space between the fed particles is utilized; the coal raw material and the biomass raw material in a fixed bed are arranged to form the concentric cylindrical structure, and a co-pyrolysis reaction is performed on the fixed bed at 400-800 DEG C. The method realizes the full contact of the coal pyrolysis volatile component and the biomass pyrolysis volatile component, promotes the full implementation of the pyrolysis secondary reaction, and achieves the purpose of improving the tar yield.The method solves the problem of coking caused by too small gas-phase reaction space in the traditional mechanical mixing method of coal and biomass co-pyrolysis, and provides a new way for improvingthe tar yield of coal and biomass fixed bed co-pyrolysis.
Description
technical field [0001] The invention relates to a method for increasing the yield of co-pyrolysis tar of biomass and coal, which belongs to the technical field of energy. Background technique [0002] The co-pyrolysis of biomass and coal has received extensive attention in recent years. As one of the most important fossil energy sources in the world, coal pyrolysis has always been an important way for its efficient and clean utilization. However, due to the low hydrogen / carbon ratio of coal, the yield of fine chemicals and high-quality energy directly from its pyrolysis is low. Biomass is a cheap, easy-to-obtain, renewable, high-hydrogen / carbon energy source, which can be used as a hydrogen supply source to co-pyrolyze with coal to effectively improve thermal conversion rate and high-quality energy yield. However, a problem currently existing in the co-pyrolysis process of biomass and coal is that when coal and biomass are mixed by traditional mechanical methods, the syner...
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IPC IPC(8): C10B53/02C10B53/04C10G1/00
CPCC10B53/02C10B53/04C10G1/00Y02E50/10Y02P20/145
Inventor 靳立军胡浩权李建刚杨赫李扬
Owner DALIAN UNIV OF TECH