Study on gas production characteristic of waste paper by microwave pyrolysis in silicon carbide reactor

An investigation was conducted to analyze the influence of microwave power and the addition of coke on the pyrolysis of tissue paper for gas generation in a silicon carbide reactor. The study revealed that the primary components of syngas obtained through tissue paper microwave pyrolysis are predominantly CO and CO ₂ , constituting approximately 80% of the total. CH ₄ and H ₂ make up 15–20% of the total. As microwave power increases, the main pyrolysis gas CO and CO ₂ is released at a higher temperature. With a microwave power range of 500W-800W and a tissue paper diameter of approximately 6mm, the highest gas production reaches 18.8wt% (130ml•g ^− 1 ) at 700W. Adding 10–20% coke can significantly increase the amount of pyrolysis gas produced from waste paper. Once the feedstock had a diameter of approximately 4mm, the gas yield rose initially and then declined when coke was added. The greatest amount of gas produced is 20.5wt% (149.3ml•g ^− 1 ) with 20% coke addition.