Process for producing hydrogen by combining biomass gasification in circulating fluidized bed with H2 adsorption enhanced water vapor transformation

A circulating fluidized bed and water vapor shift technology, applied in the field of chemistry, can solve the problems of high cost, energy consumption and cost, and achieve the effects of improving carbon conversion rate, improving gasification intensity, and prolonging residence time

Active Publication Date: 2017-09-08
UNIV OF SHANGHAI FOR SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

CO 2 Although the method of in-situ adsorption enhanced hydrogen production can obtain high-purity hydrogen, due to the adsorption of CO by the adsorbent 2 Due to the limitation of capacity, hydrogen with a purity of more than 99% cannot be obtained, and the separation process of pressure swing a

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  • Process for producing hydrogen by combining biomass gasification in circulating fluidized bed with H2 adsorption enhanced water vapor transformation

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Experimental program
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Effect test

Embodiment 1

[0047] Using biomass straw as raw material, according to the mass ratio of straw primary feed and secondary feed 1:4, the air used in circulating fluidized bed 7 is based on the ratio of the number of oxygen moles in the air to the number of carbon moles in the primary feed of biomass: 1:1.1, the water vapor used is 4:1 according to the ratio of the moles of water vapor to the carbon moles in the secondary biomass feed, and the amount of quicklime is 4 according to the mass ratio of its Ca content to the secondary biomass feed. %, the steam of the gasification agent enters the circulating fluidized bed 7 furnace and sprays it at an angle of 25 degrees downwards, and the circulating fluidized bed 7 burns and gasifies the biomass, and the generated syngas enters the H 2 In-situ adsorption enhanced water vapor shift moving bed reactor 33, according to the carbon, water vapor and nitrogen in the biomass secondary feed according to the molar ratio C:H 2 O:N 2 It is 1.78:5.35:20.8,...

Embodiment 2

[0049] Using biomass straw as raw material, according to the mass ratio of straw primary feed and secondary feed of 1:3, the air used in circulating fluidized bed 7 is based on the ratio of the number of oxygen moles in the air to the number of carbon moles in the primary feed of biomass: 1:1, the water vapor used is 3:1 according to the ratio of the number of moles of water vapor to the number of carbon moles in the secondary feed of biomass, and the amount of quicklime is 3 according to the mass ratio of the Ca content to the secondary feed of biomass %, gasification agent water vapor enters the nozzle angle of the circulating fluidized bed furnace 7 and injects it at an angle of 25 degrees downwards, and the circulating fluidized bed 7 burns and gasifies the biomass, and the generated synthesis gas enters the H 2 In-situ adsorption enhanced water vapor shift moving bed reactor 33, according to the carbon, water vapor and nitrogen in the biomass secondary feed according to th...

Embodiment 3

[0051] Using biomass straw as raw material, according to the mass ratio of straw primary feed and secondary feed of 1:5, the air used in circulating fluidized bed 7 is based on the ratio of the number of oxygen moles in the air to the number of carbon moles in the primary feed of biomass: 1:1.1, the water vapor used is 4:1 according to the ratio of the number of moles of water vapor to the number of carbon moles in the secondary biomass feed, and the amount of quicklime is 5 according to the mass ratio of its Ca content to the secondary feed of biomass %, gasification agent water vapor enters the nozzle angle of the circulating fluidized bed furnace 7 and injects it at an angle of 25 degrees downwards, and the circulating fluidized bed 7 burns and gasifies the biomass, and the generated synthesis gas enters the H 2 In-situ adsorption enhanced water vapor shift moving bed reactor 33, according to the carbon, water vapor and nitrogen in the biomass secondary feed according to the...

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Abstract

The invention provides a process for producing hydrogen by combining biomass combustion gasification and furnace internal calcium spraying in a circulating fluidized bed with H2 in-situ adsorption enhanced water vapor transformation. The process comprises the following steps: gradually enlarging a conical circulating fluidized bed of a hearth, and enabling biomass to carry out partial air combustion at the bottom of the circulating fluidized bed; releasing heat for water vapor gasification of most biomass raw materials; moreover, spraying quicklime into the furnace for catalytic synergism, enabling synergic gas generated by the circulating fluidized bed to enter a moving-bed reactor, and carrying out H2 in-situ adsorption enhanced water vapor transformation reaction to produce hydrogen at the temperature of 250 to 350DEG C; at the same time, adsorbing produced hydrogen and storing the adsorbed hydrogen in a hydrogen absorption material; separating the hydrogen absorption material for regenerating to release pure hydrogen; arranging a water vapor transformation moving bed reactor, a solid separator, a regenerator and a solid mixer for H2 adsorption enhanced water vapor transformation, and enabling a water vapor transformation catalyst and the hydrogen absorption material for adsorbing H2 to continuously and simultaneously move, react and regenerate, so as to obtain pure hydrogen with the content of 100 percent.

Description

technical field [0001] The invention relates to a chemical field, in particular to biomass circulating fluidized bed gasification combined with H 2 Adsorption enhanced water vapor shift hydrogen production. Background technique [0002] The process of producing hydrogen from a large amount of solid fuel includes: raw material gasification, CO water vapor shift, pressure swing adsorption and waste heat recovery, etc. Limited by the thermodynamic equilibrium of the reversible CO water vapor shift reaction, the general conversion rate and selectivity of hydrogen production are not high, and the purity of hydrogen gas is very low. The hydrogen gas with low purity needs to be separated and purified by subsequent products. will product H 2 Purified to more than 99%, but the process is complicated and the technical price is extremely expensive. Cheap hydrogen production is a huge challenge for the development of hydrogen energy. The innovation of suitable raw materials and core ...

Claims

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Application Information

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IPC IPC(8): C10J3/54C10J3/56C10J3/72C10J3/82B01D53/02
CPCB01D53/02B01D2256/16C10J3/54C10J3/56C10J3/72C10J3/82Y02P20/52Y02P20/584
Inventor 豆斌林张华崔国民王子龙张振华吴文广
Owner UNIV OF SHANGHAI FOR SCI & TECH
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