Chapter 7

Utilization of Pine Nut Shell for Preparation of High Surface Area Activated Carbon by Microwave Heating and Koh Activation

Xuefeng Liao

Xuefeng Liao

State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, China

National Local Joint Engineering Laboratory of Engineering Applications of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, Yunnan, China

Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China

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Jinhui Peng

Jinhui Peng

State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, China

National Local Joint Engineering Laboratory of Engineering Applications of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, Yunnan, China

Key Laboratory of Resource Clean Conversion in Ethnic Regions Education Department of Yunnan, Yunnan Minzu University, Kunming, Yunnan, China

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Shengzhou Zhang

Shengzhou Zhang

National Local Joint Engineering Laboratory of Engineering Applications of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, Yunnan, China

Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China

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Hongying Xia

Hongying Xia

National Local Joint Engineering Laboratory of Engineering Applications of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, Yunnan, China

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Libo Zhang

Libo Zhang

National Local Joint Engineering Laboratory of Engineering Applications of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, Yunnan, China

Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China

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Guo Chen

Guo Chen

National Local Joint Engineering Laboratory of Engineering Applications of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, Yunnan, China

Key Laboratory of Resource Clean Conversion in Ethnic Regions Education Department of Yunnan, Yunnan Minzu University, Kunming, Yunnan, China

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Tu Hu

Tu Hu

National Local Joint Engineering Laboratory of Engineering Applications of Microwave Energy and Equipment Technology, Kunming University of Science and Technology, Kunming, Yunnan, China

Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China

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First published: 03 February 2016

Summary

Pine nut shell is as raw material for preparation of high surface area activated carbon (HSAAC) by microwave induced KOH activation. The effects of microwave power, activation duration and KOH/C mass rate (R) on the iodine adsorption capability and activated carbon yield were investigated. Additionally the surface characteristics of HSAAC were characterized by nitrogen adsorption isotherms and SEM. The operating variables were optimized utilizing the response surface methodology and were identified microwave power 738W, activation duration 17 min, and R 4, corresponding to a yield of 46.28 % and an iodine number of 2154 mg/g. The key pore structure parameters of HSAAC such as the Brunauer–Emmett–Teller (BET) surface area and total pore volume were estimated to be 3819 m2/g and 2.09 mL/g, respectively. The findings strongly support the feasibility of microwave heating for preparation of HSAAC from spent pine nut shell by microwave induced KOH activation.

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