Pyrolysis of one of the most underutilized lignocellulosic biomasses, namely rice straw (RS) has been carried out through solar photovoltaic (PV)-powered microwave heating with biochar as an additive for the microwave absorption. Through the preliminary studies, microwave power of 700 W and reaction times of 20 min have been chosen optimum for maximizing the yield of bio-oil, a desired product for the study along with biochar ignoring gas, due to their easy collection, storability and transportation and higher commercial value. The results of the study revealed the highest yield of bio-oil as 25% and 23% with and without additive respectively. The net energy recovery percentage was calculated to be around 71 and 56 in using solar PV and grid electricity respectively. The exergy efficiency of pyrolysis system under this study was estimated to be about 55%. The payback period of the set-up is 6.5 and 3.12 years if solar PV system and grid electricity are respectively used. The monthly income of $ 33 may be earned from the pyrolytic products such as biochar, wood vinegar and tar by pyrolysing 675 kg of RS annually (2.25 kg per day at 450 g per batch with 5 batches per day and 300 days per year). The potential of mitigating CO₂ emission during the total life time of 30 years from the existing set-up is 55 tons and the earning of carbon credit is $ 1600 considering the current price of carbon credit as $ 30/ton.

通过利用太阳能光伏（PV）供电的微波加热，利用生物炭作为微波吸收的添加剂，对利用最不充分的木质纤维素生物质之一即稻草（RS）进行了热解。通过初步研究，已选择700 W的微波功率和20分钟的反应时间，以最大化生物油的产量，生物油是一种理想的研究产品，因为它易于收集，耐贮藏和运输，是与生物炭忽略气体一起研究的理想产品和更高的商业价值。研究结果表明，添加和不添加添加剂时，生物油的最高产量分别为25％和23％。使用太阳能光伏发电和电网发电的净能量回收率分别约为71和56。在该研究下，热解系统的火用效率估计约为55％。如果分别使用太阳能光伏系统和电网电力，则该装置的投资回收期为6.5年和3.12年。每年可通过热解675千克RS（例如，每天2.25千克，每批次450克，每天分5批，每年300天），从热解产品（如生物炭，木醋和焦油）中获得33美元的月收入。缓解二氧化碳的潜力₂从现有设置来看，在30年的总使用寿命中的排放量为55吨，考虑到碳信用证的当前价格为30美元/吨，碳信用证的收益为1600美元。