The persistent enhancement of greenhouse gases in the atmosphere originated from anthropogenic activities, especially CO₂, resulted in several serious global challenges. In this way, employing biomass, biochar, etc., as a low-cost precursor for CO₂ adsorbent is promising not only in the view of hydrophobic character and abundant resources, but also is an illustrious strategy for solid wastes management as a consequence of the exponential population expansion. Herein, key concepts on adsorption technology, waste management, and different activation techniques on raw carbons materials have firstly been discussed. Afterwards, almost all accomplished studies on cyclic adsorption processes e.g. PSA, TSA, VSA, etc., which employed biomass/biochar as a source of adsorbents have been extensively reviewed, that gives a precise knowledge for large scale application of these materials. Furthermore, in the last part of this work, biomass/biochar adsorbent based samples, which have already been studied for CO₂ capture, but till now, they have not been evaluated at the bench/pilot scale by cyclic adsorption process, are introduced for future directions. Also for the reader’s of this work, key concepts of each section have been summarized in the form of simple figures and tables that will help to identify clearly the prominent accomplished works till now.

大气中温室气体的持续增加源于人为活动，特别是 CO ₂，导致了若干严重的全球性挑战。_{这样，利用生物质、生物炭等作为CO 2}的低成本前体吸附剂不仅在疏水性和丰富的资源方面很有前景，而且由于人口呈指数增长，它也是一种出色的固体废物管理策略。在此，首先讨论了吸附技术、废物管理和原料碳材料的不同活化技术的关键概念。此后，几乎所有以生物质/生物炭作为吸附剂来源的循环吸附过程（例如 PSA、TSA、VSA 等）已完成的研究都得到了广泛的回顾，这为这些材料的大规模应用提供了准确的知识。此外，在这项工作的最后一部分，基于生物质/生物炭吸附剂的样品已经研究了 CO ₂捕获，但直到现在，它们还没有通过循环吸附过程在小试/中试规模上进行评估，被引入未来的方向。同样对于本书的读者，每个部分的关键概念都以简单的数字和表格的形式进行了总结，这将有助于清楚地识别迄今为止的杰出成就。