竹浆纤维水热炭微球结构可控制备研究

doi:10.3969/j.issn.0253-2417.2023.02.016

Abstract

Abstract:

In order to realize the preparation of morphologically controllable hydrothermal carbon microspheres, the effects of hydrothermal reaction conditions(reaction temperature, reaction time and reactant addition) on the morphology and physicochemical structure of the products were systematically studied using bamboo pulp fiber as a raw material. The obtained hydrothermal carbon was investigated by SEM, XRD, FT-IR and other characterization methods. The results showed that when the reaction temperature was 220℃, the reaction time was 6 h and the amount of reactant was 6 g, the carbon microspheres were dispersed and the size distribution was relatively uniform. The highest carbon fixation rate of the sample reached 24.3%, indicating that the preparation of hydrothermal carbon had a good carbon fixation ability. XRD results showed that hydrothermal carbon was an amorphous crystal. Functional gronp analysis showed that the surface of hydrothermal carbon was rich in a series ofoxygen-containing functional groups such as hydroxyl, carbonyl, ester and ether bonds. Elemental analysis showed that hydrothermal carbon had preferably carbon fixation ability. The specific surface area of the products ranged from 23.2-83.7 m²/g, and the pores were mainly mesopores. The main distribution range was 3-8 nm, and the maximum pore volume was 0.35 cm³/g.

Key words: bamboo pulp fiber, hydrothermal carbonization, controlled preparation, carbon microsphere

CLC Number:

TQ35
TQ424.1

Shitao WEN, Linxin DAI, Zhihui WANG, Zhenrui LI, Jiajun WANG, Xing'er LIU. Preparation of Bamboo Pulp Fiber Hydrothermal Carbon Microspheres with Controllable Structure[J]. Chemistry and Industry of Forest Products, 2023, 43(2): 127-134.

Figures/Tables 7

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Table 1

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References 27

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项目¹⁾ item		C/%	O/%	H/%	N/%	O/C	H/C	固相碳得率/% solid state carbon element yield	得率/% yield	比表面积²⁾/(m²·g^-1) specific surface area		总孔容/(cm³·g^-1) total pore volume
项目¹⁾ item		C/%	O/%	H/%	N/%	O/C	H/C	固相碳得率/% solid state carbon element yield	得率/% yield	总孔 total pore	介孔 mesopore	总孔容/(cm³·g^-1) total pore volume
温度 temp.	200 ℃	43.9	50.1	5.97	0.03	1.14	0.14	24.3	65.2	107.0	40.5	0.12
	210 ℃	52.3	42.3	5.38	0.21	0.81	0.10	22.2	59.7	36.1	28.1	0.06
	220 ℃	69.4	26.2	4.24	0.12	0.38	0.06	10.5	28.1	83.7	70.5	0.28
	230 ℃	70.0	25.8	4.08	0.12	0.37	0.06	9.7	26.1	58.1	46.6	0.35
	240 ℃	72.6	23.1	4.23	0.04	0.32	0.06	6.7	18.1	77.2	63.9	0.31
	250 ℃	73.6	22.3	4.07	0.05	0.30	0.06	5.8	15.5	81.2	61.1	0.31
	260 ℃	73.5	22.1	4.32	0.01	0.30	0.06	5.7	15.3	65.1	48.4	0.21
时间 time	2 h	46.4	47.9	5.68	0.02	1.03	0.12	11.4	30.6	23.2	21.3	0.04
	3 h	53.6	41.2	5.18	0.03	0.77	0.10	8.1	21.7	28.5	25.1	0.04
	4 h	62.9	32.6	4.55	0.06	0.52	0.07	6.8	18.4	35.0	28.1	0.08
	5 h	64.9	30.7	4.33	0.21	0.47	0.07	6.4	17.2	55.8	46.2	0.19
	6 h	69.4	26.2	4.24	0.13	0.38	0.06	10.5	28.1	83.7	70.5	0.28
用量 dosage	3 g	67.3	28.0	4.57	0.21	0.42	0.07	4.0	10.8	80.7	79.6	0.33
	6 g	69.4	26.2	4.24	0.11	0.38	0.06	10.5	28.1	83.7	70.5	0.28
	12 g	69.4	26.2	4.24	0.03	0.38	0.06	10.2	27.5	45.2	35.5	0.26

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[2]	DAI Lin-lin, LI Wei, WU Qiong, ZHAO Xin, LIU Shou-xin. Preparation of Micron-size Spherical Activated Carbon from Carboxymethyl Cellulose via Combination of Hydrothermal Carbonization and Carbon Dioxide Activation Method [J]. Chemistry and Industry of Forest Products, 2015, 35(4): 21-27.

Preparation of Bamboo Pulp Fiber Hydrothermal Carbon Microspheres with Controllable Structure

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