Multifunctional bio-charcoal and preparation method thereof
A multifunctional, biochar technology, applied in the field of biochar, can solve the problems of difficult control of reaction conditions, many production process links, complicated operation process, etc. Effect
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Embodiment 1
[0023] A multifunctional biochar and a preparation method thereof. Immerse the biomass in a KOH solution with a mass fraction of 1-5% for 20-30 hours, wash with water until neutral, and dry to obtain the treated biomass; then place the treated biomass in a tube furnace for mixing Carry out carbonization under atmospheric conditions, the carbonization temperature is 650~750°C, and the carbonization time is 1~5h to prepare multifunctional biochar.
[0024] The biomass described in this embodiment is rice straw. Among them: the volatile organic carbon of charcoal is 30~40wt%, the fixed carbon is 10~20wt%, the ash is 20~30wt%, and the moisture is 10~30wt%.
[0025] The mixed atmosphere described in this embodiment is: the ammonia gas integral rate is 10-30%, the sulfur dioxide gas integral rate is 1-5%, and the nitrogen gas integral rate is 50-70%; the pressure of the mixed atmosphere is 0.15-0.3 MPa.
[0026] The multifunctional biochar prepared in this example: the mass fracti...
Embodiment 2
[0028] A multifunctional biochar and a preparation method thereof. Immerse the biomass in a NaOH solution with a mass fraction of 5-10% for 40-50 hours, wash with water until neutral, and dry to obtain the treated biomass; then put the treated biomass in a tube furnace for mixing Carry out carbonization under atmospheric conditions, the carbonization temperature is 750-850°C, and the carbonization time is 5-10 hours, so as to prepare multifunctional biochar.
[0029] The biomass described in this embodiment is wheat straw. Among them: the volatile organic carbon of charcoal is 40~60wt%, the fixed carbon is 10~30wt%, the ash is 10~20wt%, and the moisture is 20~30wt%.
[0030] The mixed atmosphere described in this embodiment is: the ammonia gas integral rate is 30-50%, the oxygen volume fraction is 1-5%, the sulfur dioxide volume fraction is 1-5%, and the nitrogen gas integral rate is 40-60%; The pressure of the atmosphere is 0.15~0.3MPa.
[0031] The multifunctional biochar...
Embodiment 3
[0033] A multifunctional biochar and a preparation method thereof. Immerse the biomass in a KOH solution with a mass fraction of 10-15% for 30-40 hours, wash with water until neutral, and dry to obtain the treated biomass; then put the treated biomass in a tube furnace for mixing Carbonization is carried out under atmospheric conditions, the carbonization temperature is 300-500°C, and the carbonization time is 10-20 hours, so as to prepare multi-functional biochar.
[0034] The biomass described in this embodiment is grass. Among them: the volatile organic carbon of charcoal is 30~50wt%, the fixed carbon is 10~30wt%, the ash is 1~20wt%, and the moisture is 30~50wt%.
[0035] The mixed atmosphere described in this embodiment is: the ammonia gas integral rate is 20-40%, the oxygen volume fraction is 1-5%, the sulfur dioxide volume fraction is 5-10%, and the nitrogen gas integral rate is 40-60%; The pressure of the atmosphere is 0.15~0.3MPa.
[0036] The multifunctional biocha...
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