PHÂN TÍCH ĐẶC TÍNH CỦA THAN THẢI SAU QUÁ TRÌNH KHÍ HÓA RƠM

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Tác giả: Hong Nam Nguyen, Van Bay Tran

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Trường Đại học Công nghiệp Hà Nội, 2023

Mô tả vật lý: tr.96

Bộ sưu tập: Báo, Tạp chí

ID: 364933

Thêm vào giỏ Liên kết toàn văn

Rice straw is the most abundant agricultural waste in Vietnam. Utilizing rice straw for energy purposes through biomass gasification technology is an advanced solution. However, current biomass gasification technologies have relatively low efficiency and generate a significant amount of excess char after the gasification process. In this study, residual char from rice straw gasification in a commercial system was collected and analyzed to provide a basis for reutilization. Proximte and ultimate analysis revealed that the char from rice straw gasification has high ash content, but substantial carbon content remains. SEM-EDX analysis showed that the char has a relatively complex structure with various inorganic particles present on the surface. Furthermore, the rice straw char has a high porous structure, as indicated by its specific surface area (438m2/g), determined using the nitrogen adsorption method. The physico-chemical properties of the rice straw char after gasification demonstrate its suitability as an inexpensive and environmentally friendly adsorbent material.Rơm là rác thải nông nghiệp có trữ lượng nhiều nhất tại Việt Nam. Việc sửdụng rơm cho mục đích năng lượng bằng công nghệ khí hóa sinh khối là một giải pháp tiên tiến. Tuy nhiên các công nghệ khí hóa sinh khối hiện tại có hiệu suất tương đối thấp, tạo ra nhiều than thừa sau quá trình khí hóa. Trong nghiên cứu này, than thừa sau quá trình khí hóa rơm trên hệ thống thương mại được thu thập và phân tích nhằm cung cấp cơ sở dữ liệu cho việc tái sử dụng. Phân tích kỹ thuật và nguyên tố cho thấy than rơm sau khí hóa có hàm lượng tro cao, tuy nhiên làm lượng cacbon vẫn tương đối đáng kể. Phân tích SEM-EDX cho thấy than rơm có cấu trúc tương đối phức tạp với nhiều hạt vô cơ hiện diện trên bề mặt. Ngoài ra than rơm có độ rỗng xốp cao, thể hiện qua diện tích bề mặt riêng (438m2/g), xác định bằng phương pháp hấp nhả nitơ. Các đặc tính lý - hóa của than rơm sau quá trình khí hóa cho thấy sự phù hợp của than rơm sau quá trình khí hóa như một chất hấp phụ rẻ và thân thiện môi trường.

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