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Phosphorus-rich biomass pyrolytic carbon capable of controllably releasing available phosphorus and preparation method and application thereof

A biomass pyrolysis and available phosphorus technology, which is applied in the fields of application, chemical instruments and methods, organic fertilizers, etc., can solve the problems of limited data on heat treatment of food waste and energy recovery, application uncertainty, etc., to reduce hindrance and promote Effects on crop growth, broad application prospects

Inactive Publication Date: 2019-11-12
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Data on thermal processing of food waste and energy recovery are fairly limited, so application in agriculture is uncertain

Method used

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  • Phosphorus-rich biomass pyrolytic carbon capable of controllably releasing available phosphorus and preparation method and application thereof
  • Phosphorus-rich biomass pyrolytic carbon capable of controllably releasing available phosphorus and preparation method and application thereof
  • Phosphorus-rich biomass pyrolytic carbon capable of controllably releasing available phosphorus and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] (1) Pretreatment for the preparation of phosphorus-rich biomass pyrolytic carbon: phosphorus-rich biomass (shrimp shells, wild-caught shrimp from the Gulf of Mexico) is placed on an iron tray and placed in an oven at 60°C for more than 24 hours to ensure complete drying Dry; pulverize with a small pulverizer (rotating speed 25000r / min); after pulverization, the particle size is 2-5mm.

[0044] (2) Preparation of phosphorus-rich biomass pyrolytic carbon: the phosphorus-rich biomass, that is, the above-mentioned pulverized particles, was heated in a nitrogen stream (40mLmin -1 flow rate) to the set temperature (200°C, 300°C, 400°C, 500°C, 600°C, 700°C, 800°C) using a laboratory-scale tube furnace, and kept for 2 hours. Subsequently, the obtained biochar samples were naturally cooled to room temperature under a nitrogen atmosphere. The biochar samples were ground and screened into the following two particle fractions, particle size<38um (passed through a 400-mesh sieve) a...

Embodiment 2

[0059] (1) Pretreatment of phosphorus-rich biomass pyrolytic carbon preparation: phosphorus-rich biomass (shrimp shells, wild-caught shrimp from the East China Sea) is placed on an iron tray and placed in an oven at 60°C for more than 24 hours to ensure complete drying Dry; pulverize with a small pulverizer (rotating speed 25000r / min); after pulverization, the particle size is 2-5mm.

[0060] (2) Preparation of phosphorus-rich biomass pyrolytic carbon: the phosphorus-rich biomass, that is, the above-mentioned pulverized particles, was heated in a nitrogen stream (40mLmin -1 flow rate) using a laboratory-scale tube furnace to raise the temperature to 450, 650, and 850°C, respectively, and keep the temperature for 2h. The obtained biochar samples were naturally cooled to room temperature under a nitrogen atmosphere. Biochar samples with different pyrolysis temperatures were ground and sieved to obtain particles with a particle size of 200um-450um (the sieved material between tw...

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Abstract

The invention discloses phosphorus-rich biomass pyrolytic carbon capable of controllably releasing available phosphorus and a preparation method and an application thereof. The method comprises the following steps: (1) drying and crushing phosphorus-rich biomass shrimp shells to obtain shrimp shell powder; and (2) heating the shrimp shell powder obtained in the step (1) to 200-850 DEG C in a protective gas atmosphere, carrying out heat preservation for 2 hours for carbonization, cooling the shrimp shell to room temperature, sieving the product and collecting the particles less than 600 [mu]m in size, thereby obtaining the phosphorus-rich biomass pyrolytic carbon capable of controllably releasing available phosphorus. The phosphorus-rich biomass pyrolytic carbon can effectively promote thecontrolled release of available phosphorus without ultramicro particles, and reduces the power consumption required for preparing high-temperature pyrolytic biomass carbon and the economic cost for grinding the ultramicro particles. The product can increase the crop yield and promote the crop growth by improving the bioavailability of the phosphorus element in the soil.

Description

technical field [0001] The invention belongs to the technical field of soil remediation agents for controlling the release of biologically available phosphorus, and in particular relates to a phosphorus-rich biomass pyrolytic charcoal capable of controlling the release of available phosphorus, a preparation method and application thereof. Background technique [0002] Phosphorus is an essential element for plant growth and development. The phosphorus required for plant growth and development is mainly obtained from the soil phosphorus pool, or through fertilization so that plants can absorb enough phosphorus. Phosphorus deficiency has an impact on plant photosynthesis, respiration and biosynthesis, which will lead to morphological and physiological changes in plants. [0003] Phosphorus fertilizer is the main source of phosphorus in soil. Phosphorus is a non-renewable resource, and the world's phosphate rock resources are very limited. According to research estimates, the...

Claims

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Application Information

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IPC IPC(8): C10B53/00C10B57/10C09K17/04
CPCC09K17/04C10B53/00C10B57/10
Inventor 简秀梅林英行李彦涵张彧涵涂任程树朝许细薇任永志蒋恩臣
Owner SOUTH CHINA AGRI UNIV
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