PREPARATION OF ACTIVATED CARBON FROM SALAK SEED BY CHEMICAL ACTIVATION
ผู้เขียน :
R. SUPATTRA
,
S. RUENGWIT
,
K. ARTIT
,
S. SURACHOK
,
P. JATUPONG
,
S. CHADAPORN
,
S. MONTHIRA
เผยแพร่วันที่ :
6 มิ.ย. 2561
ประเภท :
บทความวิจัยที่ตีพิมพ์ในรายงานสืบเนื่องจากการประชุมวิชาการระดับนานาชาติ
วารสารวิชาการ :
Proceedings of the 6th International Congress on Green Process Engineering
เล่มที่ :
ฉบับที่ :
หน้า :
163
ผู้เผยแพร่ :
ENSIACET, Toulouse-Labège campus, Toulouse
รายละเอียด :
Salak (Salacca Zalacca) is a species of palm tree. It is an attractive tropical fruit, is planted on a large scale in Indonesia, Malaysia, and Thailand. Salak fruit consists of pulp and hard-coated seeds.The pulp taste is usually sweet and acidic with unique smell, while the seed is inedible and disposed to the sanitary landfills. A lot of residual seed from Salak seedless in syrup, the famous dessert in Chanthaburi province (Thailand), was converting to waste and environmental pollution. This study focused on preparation of activated carbon from Salak seeds, both cultivars of Sumalee and Noen Wong, by the chemical activation. The carbonization conditions were at temperatures of 400, 500 and 600 °C for 1, 2 and 3 h, respectively. All charcoal samples were activated by 50% v/v phosphoric acid. The impregnation ratio of charcoal to phosphoric acid was 1:3. The activated temperature was 500°C for 1 h. The results showed that the adsorption capacity slightly decrease when increasing temperature and time for carbonization. That is because some of the pores enlarged or even collapsed. The moisture, ash, and volatile matter contents of the activated carbon were mostly high which caused of low fixed carbon content of Salak seed. The highest iodine value was achieved as high as 705.97±84.98 and 658.57±34.80 mg/g for Sumalee and Noen Wong samples, respectively. It was related to their BET surface area at 1,195.66 and 547.33 m2/g, respectively. On the other hand, the commercial AC has iodine value higher than 800 mg/g. The methylene blue index of all samples was very low. In other words, the activated carbon was microporous material. The iodine value of the activated carbon from Salak (cultivar: Sumalee) seed prepared in the air-free prototype furnace was lower than the ones prepared in the Carbolite® furnace because the temperature in the prototype furnace could not efficiently control to reach 400 oC.
ลิงค์ :