Preparation method and application of vinegar residue biomass charcoal-molybdenum disulfide composite material

A technology of molybdenum disulfide and composite materials, which is applied in the direction of chemical instruments and methods, separation methods, grease/oily substances/floating matter removal devices, etc., to achieve the effects of cheap and easy-to-obtain raw materials, large specific surface area, and large adsorption

Pending Publication Date: 2021-07-23
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: Aiming at the problems that a large amount of cheap and efficient adsorption materials are needed for oilfield sewage treatment, and vinegar companies need to develop more vinegar residue treatment methods, the present invention provides a vinegar residue biomass charcoal-molybdenum disulfide composite material, the composite material Porous structure, large specific surface area, strong adsorption capacity, can significantly reduce the COD of oilfield sewage, and has great application potential in the treatment of oilfield sewage, printing and dyeing sewage and other industrial sewage treatment

Method used

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  • Preparation method and application of vinegar residue biomass charcoal-molybdenum disulfide composite material
  • Preparation method and application of vinegar residue biomass charcoal-molybdenum disulfide composite material
  • Preparation method and application of vinegar residue biomass charcoal-molybdenum disulfide composite material

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Embodiment 1

[0034] (1) Preparation of vinegar residue biochar:

[0035] Referring to the treatment methods of biomass in relevant literature (Zhang et al. Journal of Environmental Science, 47 (2016) 7-13; Zeng et al. Science of the Total Environment 648 (2019) 206-217), the dried vinegar grains were placed Biomass charcoal was prepared by pyrolysis at 500°C for 2 hours in a tube furnace, and nitrogen gas was continuously flowed into the tube furnace.

[0036] (2) Preparation of vinegar residue biochar-molybdenum disulfide composite material:

[0037] 230mg Na 2 MoO 4 2H 2 O and 460 mg of thioacetamide were dissolved in 60 mL of deionized water, and 0.1 g of the prepared biochar and 0.1 mM (final concentration) PEG-1000 were added sequentially while stirring the solution, and ultrasonically dispersed for 30 min. Then the whole solution was transferred to a 100mL polytetrafluoroethylene tube, heated to 180°C in a high-pressure hydrothermal synthesis reactor, and hydrothermally reacted f...

Embodiment 2

[0039] Characterization of vinegar residue biochar-molybdenum disulfide composite material and analysis of COD adsorption performance of oilfield sewage:

[0040] The vinegar residue biomass charcoal-molybdenum disulfide composite material prepared in Example 1 is used as an adsorption material, and the oilfield sewage is taken from Shengli Oilfield, and its basic physical and chemical properties are: pH 7.2-7.5, COD Cr220-470mg / L, suspended solids 130-146mg / L, sulfide 2.1-3.9mg / L, volatile phenol 0.7-0.9mg / L, petroleum 45-65mg / L.

[0041] ①Scanning electron microscope observation and specific surface area analysis of vinegar residue biochar

[0042] Scanning electron microscope is adopted to carry out morphology observation and analysis to the vinegar residue biochar prepared in embodiment 1, and the results are as attached figure 1 shown. pass figure 1 It can be observed that the biochar obtained by pyrolysis has a porous structure with defects at the edges. The BET meth...

Embodiment 3

[0058] (1) Place the dried vinegar grains in a tube furnace for thermal cracking at 350°C for 3 hours, and continuously flow nitrogen into the tube furnace to produce biochar.

[0059] (2) Add 200mg Na 2 MoO 4 2H 2 O and 450 mg of thioacetamide were dissolved in 60 mL of deionized water, and 0.08 g of prepared biochar and 0.1 mM (final concentration) PEG-1000 were added sequentially when stirring the solution, and ultrasonically dispersed for 30 min. Then the entire solution was transferred to a 100 mL polytetrafluoroethylene tube, heated to 180° C. in a high-pressure hydrothermal synthesis reactor, and hydrothermally reacted for 36 hours. After the mixture was naturally cooled to room temperature, the black solid precipitate was collected by centrifugation (8000rpm, 10min), washed 3 times with absolute ethanol and deionized water, and dried overnight in an oven at 80°C to obtain the vinegar residue biomass charcoal-molybdenum disulfide composite material.

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Abstract

The invention discloses a preparation method and application of a vinegar residue biomass charcoal-molybdenum disulfide composite material. The composite material is obtained by thermally cracking vinegar production industrial waste-vinegar residue as a raw material to prepare biomass charcoal, and synthesizing molybdenum disulfide (MoS2) nanosheets on the surface of the biomass charcoal by adopting a hydrothermal method. The composite material is prepared from wastes, has a porous structure, a large specific surface area and strong adsorption capacity, can obviously reduce the COD (Chemical Oxygen Demand) of oilfield sewage, has a huge application potential in treatment of industrial sewage such as oilfield sewage and printing and dyeing sewage, and provides a new method for recycling of vinegar residue wastes for vinegar making enterprises.

Description

technical field [0001] The invention relates to the field of oilfield sewage treatment, in particular to a vinegar residue biomass charcoal-molybdenum disulfide composite material and its preparation method and application. Background technique [0002] At present, most oilfields are in the middle and late stages of secondary oil recovery development, and most of them adopt water injection production. It is estimated that for every 1 ton of crude oil produced, about 2 to 3 tons of water need to be injected, and the water content of the produced oil is 70% to 80% (some oil fields that have entered the late stage of production have a water content of crude oil as high as 90%). The quality of oilfield wastewater is complex, containing various components such as petroleum, demulsifier, salt, phenol, and sulfur. [0003] The hazards of oilfield sewage to the environment mainly include: ① The oil slick forms an oil film that hinders atmospheric reoxygenation; ② Aerobic microorgan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/40C02F1/28
CPCB01J20/0218B01J20/0266B01J20/20C02F1/40C02F1/281
Inventor 黄和李霜俞亚东
Owner NANJING NORMAL UNIVERSITY
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